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Repurchase Agreements Repurchase Agreements By Maturity Period (Details) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2014 | Dec. 31, 2013
--- | --- | ---
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Deferred Costs | $ 139 | $ 243
Maturity up to 30 days [Member] |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Repurchase Agreements, Maturities | 369,542 | 206,112
Maturity 31 to 60 days [Member] |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Repurchase Agreements, Maturities | 715,516 | 492,145
Matuity 61 to 90 days [Member] |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Repurchase Agreements, Maturities | 987,579 | 665,020
Maturity 91 to 120 days [Member] |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Repurchase Agreements, Maturities | 545,628 | 783,371
Maturity 121 to 190 days [Member] |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Repurchase Agreements, Maturities | 867,418 | 1,434,349
Repurchase Agreements [Member] |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Repurchase Agreements, Maturities | $ 3,485,683 | $ 3,580,997

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- Definition The carrying amount of deferred costs. + References No definition available. + Details
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- Definition Carrying value, as of the balance sheet date, of securities sold under agreements to repurchase where the transferor maintains effective control over the assets, accounting for them as secured debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(m)(1)(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 10 -Section 55 -Paragraph 51 -URI http://asc.fasb.org/extlink&oid=7580763&loc=d3e101761-111710 + Details
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