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Includes amounts representing dividends not currently declared or paid but which will be payable under the redemption features or for which ultimate payment is solely within the control of the issuer.","units":{"USD":[{"end":"2010-12-22","val":17000000,"accn":"0001144204-14-014191","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-07","frame":"CY2010Q4I"},{"end":"2010-12-22","val":17000000,"accn":"0001144204-13-013819","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2011-11-23","val":17000000,"accn":"0001144204-14-014191","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-07","frame":"CY2011Q4I"},{"end":"2011-11-23","val":17000000,"accn":"0001144204-13-013819","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"}]}},"PreferredStockSharesAuthorized":{"label":"Preferred Stock, Shares Authorized","description":"The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.","units":{"shares":[{"end":"2010-12-31","val":34000,"accn":"0001144204-12-013924","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-09","frame":"CY2010Q4I"},{"end":"2010-12-31","val":34000,"accn":"0001144204-11-060832","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-02"},{"end":"2010-12-31","val":34000,"accn":"0001144204-11-044109","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-05"},{"end":"2011-06-30","val":34000,"accn":"0001144204-11-044109","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-05","frame":"CY2011Q2I"},{"end":"2011-09-30","val":34000,"accn":"0001144204-11-060832","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-02","frame":"CY2011Q3I"},{"end":"2011-12-31","val":34000,"accn":"0001144204-12-013924","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-09","frame":"CY2011Q4I"}]}},"PreferredStockSharesIssued":{"label":"Preferred Stock, Shares Issued","description":"Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt.","units":{"shares":[{"end":"2010-12-31","val":17000,"accn":"0001144204-11-044109","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-05"},{"end":"2010-12-31","val":17000,"accn":"0001144204-11-060832","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-02"},{"end":"2010-12-31","val":17000,"accn":"0001144204-12-013924","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-09","frame":"CY2010Q4I"},{"end":"2011-06-30","val":17000,"accn":"0001144204-11-044109","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-05","frame":"CY2011Q2I"},{"end":"2011-09-30","val":17000,"accn":"0001144204-11-060832","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-02","frame":"CY2011Q3I"},{"end":"2011-12-31","val":0,"accn":"0001144204-12-013924","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-09"},{"end":"2011-12-31","val":0,"accn":"0001144204-13-013819","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q4I"},{"end":"2013-12-31","val":34000,"accn":"0001144204-15-015604","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-12","frame":"CY2013Q4I"}]}},"PreferredStockSharesOutstanding":{"label":"Preferred Stock, Shares Outstanding","description":"Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased.","units":{"shares":[{"end":"2010-12-31","val":17000,"accn":"0001144204-11-060832","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-02","frame":"CY2010Q4I"},{"end":"2010-12-31","val":17000,"accn":"0001144204-11-044109","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-05"},{"end":"2011-06-30","val":17000,"accn":"0001144204-11-044109","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-05","frame":"CY2011Q2I"},{"end":"2011-09-30","val":17000,"accn":"0001144204-11-060832","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-02","frame":"CY2011Q3I"}]}},"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' equity.","units":{"USD":[{"end":"2010-12-31","val":16790000,"accn":"0001144204-12-013924","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-09","frame":"CY2010Q4I"},{"end":"2010-12-31","val":16790000,"accn":"0001144204-11-060832","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-02"},{"end":"2010-12-31","val":16790000,"accn":"0001144204-11-044109","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-05"},{"end":"2011-06-30","val":16882000,"accn":"0001144204-11-044109","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-05","frame":"CY2011Q2I"},{"end":"2011-09-30","val":16930000,"accn":"0001144204-11-060832","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-02","frame":"CY2011Q3I"}]}},"ProceedsFromIssuanceOfCommonStock":{"label":"Proceeds from Issuance of Common Stock","description":"The cash inflow from the additional capital contribution to the entity.","units":{"USD":[{"start":"2010-01-01","end":"2010-12-31","val":28173000,"accn":"0001144204-13-013819","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2010-01-01","end":"2010-12-31","val":28173000,"accn":"0001144204-12-013924","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-09"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0001144204-13-013819","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011"}]}},"ProceedsFromIssuanceOfDebt":{"label":"Proceeds from Issuance of Debt","description":"The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.","units":{"USD":[{"start":"2008-03-01","end":"2008-03-31","val":20000000,"accn":"0001144204-13-013819","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2008-03-01","end":"2008-03-31","val":20000000,"accn":"0001144204-14-014191","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-07"},{"start":"2008-03-01","end":"2008-03-31","val":20000000,"accn":"0001144204-15-015604","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-12","frame":"CY2008Q1I"}]}},"ProceedsFromIssuanceOfRedeemablePreferredStock":{"label":"Proceeds from Issuance of Redeemable Preferred Stock","description":"The cash inflow from issuance of preferred stock that is classified as callable.","units":{"USD":[{"start":"2007-05-01","end":"2007-05-31","val":18000000,"accn":"0001144204-13-013819","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2007-05-01","end":"2007-05-31","val":18000000,"accn":"0001144204-14-014191","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-07"},{"start":"2007-05-01","end":"2007-05-31","val":18000000,"accn":"0001144204-15-015604","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-12","frame":"CY2007Q2I"}]}},"ProceedsFromLifeInsurancePolicies":{"label":"Proceeds from Life Insurance Policy","description":"Amount of cash inflow for proceeds from settlement of corporate-owned life insurance policy, classified as investing activities. Includes, but is not limited to, bank-owned life insurance 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Calls of Debt Securities, Available-for-sale","description":"Amount of cash inflow from maturity, prepayment and call of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income 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