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Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.","units":{"USD":[{"end":"2010-12-31","val":67119000,"accn":"0001144204-12-014206","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-12","frame":"CY2010Q4I"},{"end":"2010-12-31","val":67119000,"accn":"0001144204-11-063970","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-14"},{"end":"2010-12-31","val":67119000,"accn":"0001144204-11-046614","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-15"},{"end":"2011-06-30","val":56259000,"accn":"0001144204-11-046614","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-15","frame":"CY2011Q2I"},{"end":"2011-09-30","val":55553000,"accn":"0001144204-11-063970","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-14","frame":"CY2011Q3I"},{"end":"2011-12-31","val":43685000,"accn":"0001144204-13-013303","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-06","frame":"CY2011Q4I"},{"end":"2011-12-31","val":43685000,"accn":"0001144204-12-061208","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-13"},{"end":"2011-12-31","val":43685000,"accn":"0001144204-12-044304","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"end":"2011-12-31","val":43685000,"accn":"0001144204-12-027462","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-10"},{"end":"2011-12-31","val":43685000,"accn":"0001144204-12-014206","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-12"},{"end":"2012-03-31","val":41673000,"accn":"0001144204-12-027462","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-10","frame":"CY2012Q1I"},{"end":"2012-06-30","val":39730000,"accn":"0001144204-12-044304","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":38382000,"accn":"0001144204-12-061208","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-13","frame":"CY2012Q3I"},{"end":"2012-12-31","val":37631000,"accn":"0001144204-13-045538","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-14","frame":"CY2012Q4I"},{"end":"2012-12-31","val":37631000,"accn":"0001144204-13-025886","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":37631000,"accn":"0001144204-13-013303","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-06"},{"end":"2013-03-31","val":37043000,"accn":"0001144204-13-025886","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":37369000,"accn":"0001144204-13-045538","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-14","frame":"CY2013Q2I"}]}},"AssetsCurrent":{"label":"Assets, Current","description":"Sum of the carrying amounts as of the balance sheet date of all assets that are expected to be realized in cash, sold, or consumed within one year (or the normal operating cycle, if longer). Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or 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any.","units":{"USD":[{"end":"2011-12-31","val":3000000,"accn":"0001144204-13-013303","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-06","frame":"CY2011Q4I"},{"end":"2011-12-31","val":3000000,"accn":"0001144204-12-061208","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-13"},{"end":"2011-12-31","val":3000000,"accn":"0001144204-12-044304","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"end":"2012-06-30","val":3790000,"accn":"0001144204-12-044304","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":5068000,"accn":"0001144204-12-061208","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-13","frame":"CY2012Q3I"},{"end":"2012-12-31","val":5603000,"accn":"0001144204-13-045538","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-14","frame":"CY2012Q4I"},{"end":"2012-12-31","val":5603000,"accn":"0001144204-13-025886","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":5603000,"accn":"0001144204-13-013303","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-06"},{"end":"2013-03-31","val":4269000,"accn":"0001144204-13-025886","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":4422000,"accn":"0001144204-13-045538","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-14","frame":"CY2013Q2I"}]}},"AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost":{"label":"Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year One Through Five","description":"Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in second through fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2012-06-30","val":1238000,"accn":"0001144204-12-044304","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":1491000,"accn":"0001144204-12-061208","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-13","frame":"CY2012Q3I"},{"end":"2012-12-31","val":1900000,"accn":"0001144204-13-013303","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-06","frame":"CY2012Q4I"},{"end":"2013-03-31","val":656000,"accn":"0001144204-13-025886","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":250000,"accn":"0001144204-13-045538","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-14","frame":"CY2013Q2I"}]}},"AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue":{"label":"Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five","description":"Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in second through fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2012-06-30","val":1241000,"accn":"0001144204-12-044304","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":1495000,"accn":"0001144204-12-061208","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-13","frame":"CY2012Q3I"},{"end":"2012-12-31","val":1906000,"accn":"0001144204-13-013303","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-06","frame":"CY2012Q4I"},{"end":"2013-03-31","val":654000,"accn":"0001144204-13-025886","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":250000,"accn":"0001144204-13-045538","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-14","frame":"CY2013Q2I"}]}},"AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost":{"label":"Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, Year One","description":"Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2012-06-30","val":2552000,"accn":"0001144204-12-044304","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":3577000,"accn":"0001144204-12-061208","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-13","frame":"CY2012Q3I"},{"end":"2012-12-31","val":3703000,"accn":"0001144204-13-013303","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-06","frame":"CY2012Q4I"},{"end":"2013-03-31","val":3613000,"accn":"0001144204-13-025886","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":4172000,"accn":"0001144204-13-045538","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-14","frame":"CY2013Q2I"}]}},"AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue":{"label":"Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One","description":"Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2012-06-30","val":2555000,"accn":"0001144204-12-044304","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":3594000,"accn":"0001144204-12-061208","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-13","frame":"CY2012Q3I"},{"end":"2012-12-31","val":3738000,"accn":"0001144204-13-013303","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-06","frame":"CY2012Q4I"},{"end":"2013-03-31","val":3644000,"accn":"0001144204-13-025886","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":4188000,"accn":"0001144204-13-045538","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-14","frame":"CY2013Q2I"}]}},"AvailableForSaleSecuritiesFairValueDisclosure":{"label":"Available-for-sale Securities, Fair Value Disclosure (Deprecated 2013-01-31)","description":"This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as 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Excludes preferred shares that are classified as debt.","units":{"shares":[{"end":"2010-12-31","val":0,"accn":"0001144204-11-063970","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-14","frame":"CY2010Q4I"},{"end":"2010-12-31","val":0,"accn":"0001144204-11-046614","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-15"},{"end":"2011-06-30","val":0,"accn":"0001144204-11-046614","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-15","frame":"CY2011Q2I"},{"end":"2011-09-30","val":0,"accn":"0001144204-11-063970","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-14","frame":"CY2011Q3I"},{"end":"2011-12-31","val":0,"accn":"0001144204-13-013303","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-06","frame":"CY2011Q4I"},{"end":"2011-12-31","val":0,"accn":"0001144204-12-061208","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-13"},{"end":"2011-12-31","val":0,"accn":"0001144204-12-044304","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"end":"2012-06-30","val":0,"accn":"0001144204-12-044304","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":0,"accn":"0001144204-12-061208","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-13","frame":"CY2012Q3I"},{"end":"2012-12-31","val":0,"accn":"0001144204-13-045538","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-14","frame":"CY2012Q4I"},{"end":"2012-12-31","val":0,"accn":"0001144204-13-025886","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":0,"accn":"0001144204-13-013303","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-06"},{"end":"2013-03-31","val":0,"accn":"0001144204-13-025886","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":0,"accn":"0001144204-13-045538","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-14","frame":"CY2013Q2I"}]}},"PreferredStockValue":{"label":"Preferred Stock, Value, Issued","description":"Aggregate par or stated value of issued nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable preferred shares, par value and other disclosure concepts are in another section within stockholders' 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Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.","units":{"USD":[{"end":"2011-12-31","val":874000,"accn":"0001144204-13-013303","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-06","frame":"CY2011Q4I"},{"end":"2012-12-31","val":1011000,"accn":"0001144204-13-013303","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-06","frame":"CY2012Q4I"}]}},"PropertyPlantAndEquipmentNet":{"label":"Property, Plant and Equipment, Net","description":"Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. 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The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). 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