Quarterly report pursuant to Section 13 or 15(d)

Schedule of Restricted Cash and Cash Equivalents (Details)

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Schedule of Restricted Cash and Cash Equivalents (Details) - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Restricted Cash and Cash Equivalents Items [Line Items]    
Restricted Cash and Cash Equivalents Held By Broker Counterparties For Securities Trading Activity $ 17,250 $ 12,000
Restricted Cash and Cash equivalents Held by Broker Counterparties For Derivatives Trading Activity 210,597 211,989
Restricted Cash and Cash Equivalents Held By Repurchase Counterparties as Restricted Collateral 182,709 112,435
Restricted Cash and Cash Equivalents Held by Broker and Repurchase Counterparties 410,556 336,424
Restricted Cash and Cash Equivalents, Noncurrent 347 347
Restricted Cash and Cash Equivalents $ 410,903 $ 336,771