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Cash Equivalents, Restricted Cash and Restricted Cash Equivalents","description":"Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.","units":{"USD":[{"end":"2016-12-31","val":33087000,"accn":"0000873044-18-000091","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-03"},{"end":"2016-12-31","val":33087000,"accn":"0000873044-18-000110","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-08","frame":"CY2016Q4I"},{"end":"2017-06-30","val":46248000,"accn":"0000873044-18-000091","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-03","frame":"CY2017Q2I"},{"end":"2017-09-30","val":12682000,"accn":"0000873044-18-000110","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-08","frame":"CY2017Q3I"},{"end":"2018-06-30","val":9599000,"accn":"0000873044-18-000091","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-03","frame":"CY2018Q2I"},{"end":"2018-09-30","val":14094000,"accn":"0000873044-18-000110","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-08","frame":"CY2018Q3I"}]}},"CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect":{"label":"Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect","description":"Amount of increase (decrease) in cash, cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; including effect from exchange rate change. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.","units":{"USD":[{"start":"2017-01-01","end":"2017-06-30","val":13161000,"accn":"0000873044-18-000091","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-03"},{"start":"2017-01-01","end":"2017-09-30","val":-20405000,"accn":"0000873044-18-000110","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-08"},{"start":"2018-01-01","end":"2018-06-30","val":1475000,"accn":"0000873044-18-000091","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-03"},{"start":"2018-01-01","end":"2018-09-30","val":5970000,"accn":"0000873044-18-000110","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-08"}]}},"CashFlowHedgeGainLossReclassifiedToCostOfSalesNet":{"label":"Cash Flow Hedge Gain (Loss) Reclassified to Cost of Sales, Net (Deprecated 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This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' 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Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.","units":{"USD":[{"end":"2014-12-31","val":10000000,"accn":"0000873044-15-000089","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-07-31"},{"end":"2014-12-31","val":10000000,"accn":"0000873044-15-000130","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-10-30"},{"end":"2014-12-31","val":10000000,"accn":"0000873044-16-000154","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-02","frame":"CY2014Q4I"},{"end":"2015-06-30","val":10000000,"accn":"0000873044-15-000089","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-07-31","frame":"CY2015Q2I"},{"end":"2015-09-30","val":10000000,"accn":"0000873044-15-000130","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-10-30","frame":"CY2015Q3I"},{"end":"2015-12-31","val":15000000,"accn":"0000873044-16-000154","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-02"},{"end":"2015-12-31","val":15000000,"accn":"0000873044-16-000180","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-04"},{"end":"2015-12-31","val":15000000,"accn":"0000873044-16-000211","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-07-29"},{"end":"2015-12-31","val":15000000,"accn":"0000873044-16-000249","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-10-31"},{"end":"2015-12-31","val":15000000,"accn":"0000873044-17-000019","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-01","frame":"CY2015Q4I"},{"end":"2016-03-31","val":15000000,"accn":"0000873044-16-000180","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-04","frame":"CY2016Q1I"},{"end":"2016-06-30","val":25000000,"accn":"0000873044-16-000211","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-07-29","frame":"CY2016Q2I"},{"end":"2016-09-30","val":25000000,"accn":"0000873044-16-000249","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-10-31","frame":"CY2016Q3I"},{"end":"2016-12-31","val":25000000,"accn":"0000873044-17-000019","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-01"},{"end":"2016-12-31","val":25000000,"accn":"0000873044-17-000042","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-02"},{"end":"2016-12-31","val":25000000,"accn":"0000873044-17-000077","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-03"},{"end":"2016-12-31","val":25000000,"accn":"0000873044-17-000100","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-08"},{"end":"2016-12-31","val":25000000,"accn":"0000873044-18-000025","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-28","frame":"CY2016Q4I"},{"end":"2017-03-31","val":40000000,"accn":"0000873044-17-000042","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-02","frame":"CY2017Q1I"},{"end":"2017-06-30","val":45000000,"accn":"0000873044-17-000077","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-03","frame":"CY2017Q2I"},{"end":"2017-09-30","val":15000000,"accn":"0000873044-17-000100","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-08","frame":"CY2017Q3I"},{"end":"2017-12-31","val":16000000,"accn":"0000873044-18-000025","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-28"},{"end":"2017-12-31","val":16000000,"accn":"0000873044-18-000062","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-04"},{"end":"2017-12-31","val":16000000,"accn":"0000873044-18-000091","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-03"},{"end":"2017-12-31","val":16000000,"accn":"0000873044-18-000110","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-08","frame":"CY2017Q4I"},{"end":"2018-03-31","val":8547000,"accn":"0000873044-18-000062","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-04","frame":"CY2018Q1I"},{"end":"2018-06-30","val":12176000,"accn":"0000873044-18-000091","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-03","frame":"CY2018Q2I"},{"end":"2018-09-30","val":11989000,"accn":"0000873044-18-000110","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-08","frame":"CY2018Q3I"}]}},"LineOfCreditFacilityAmountOutstanding":{"label":"Line of Credit Facility, Amount Outstanding (Deprecated 2014-01-31)","description":"Amount borrowed under the credit facility as of the balance sheet 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of Credit Facility, Commitment Fee Amount","description":"Amount of the fee for available but unused credit capacity under the credit facility.","units":{"USD":[{"start":"2012-01-01","end":"2012-06-30","val":35000,"accn":"0000873044-12-000086","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-03"},{"start":"2012-01-01","end":"2012-09-30","val":35000,"accn":"0000873044-12-000127","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-02"},{"start":"2013-01-01","end":"2013-03-31","val":35000,"accn":"0000873044-13-000029","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":35000,"accn":"0000873044-13-000073","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-09-30","val":35000,"accn":"0000873044-13-000128","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-07"}]}},"LineOfCreditFacilityCurrentBorrowingCapacity":{"label":"Line of Credit Facility, Current Borrowing 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facility.","units":{"USD":[{"end":"2012-06-30","val":40000000,"accn":"0000873044-12-000086","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-03","frame":"CY2012Q2I"},{"end":"2012-09-30","val":40000000,"accn":"0000873044-12-000127","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-02","frame":"CY2012Q3I"},{"end":"2013-03-31","val":40000000,"accn":"0000873044-13-000029","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":40000000,"accn":"0000873044-13-000073","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":35000000,"accn":"0000873044-13-000128","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-07","frame":"CY2013Q3I"},{"end":"2013-12-31","val":35000000,"accn":"0000873044-14-000040","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-14","frame":"CY2013Q4I"},{"end":"2014-03-31","val":35000000,"accn":"0000873044-14-000083","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02","frame":"CY2014Q1I"},{"end":"2014-06-30","val":35000000,"accn":"0000873044-14-000129","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":35000000,"accn":"0000873044-14-000162","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-07","frame":"CY2014Q3I"},{"end":"2014-12-31","val":35000000,"accn":"0000873044-15-000031","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-27","frame":"CY2014Q4I"},{"end":"2015-06-30","val":5000000,"accn":"0000873044-15-000089","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-07-31","frame":"CY2015Q2I"},{"end":"2015-09-30","val":5000000,"accn":"0000873044-15-000130","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-10-30","frame":"CY2015Q3I"},{"end":"2016-03-31","val":5000000,"accn":"0000873044-16-000180","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-04","frame":"CY2016Q1I"},{"end":"2016-06-30","val":5000000,"accn":"0000873044-16-000211","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-07-29","frame":"CY2016Q2I"}]}},"LineOfCreditFacilityRemainingBorrowingCapacity":{"label":"Line 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Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. 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Amount excludes temporary equity. Alternate caption for the concept is permanent 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