Quarterly report pursuant to Section 13 or 15(d)

Schedule of Restricted Cash and Cash Equivalents (Details)

v3.7.0.1
Schedule of Restricted Cash and Cash Equivalents (Details) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Mar. 31, 2016
Dec. 31, 2015
Restricted Cash and Cash Equivalents Items [Line Items]        
Restricted cash $ 381,664 $ 408,312 $ 281,145 $ 262,562
Restricted Cash and Cash Equivalents Held for Securities Trading Activity [Member]        
Restricted Cash and Cash Equivalents Items [Line Items]        
Restricted cash 27,810 26,310    
Restricted Cash and Cash Equivalents Held for Derivatives Trading Activity [Member]        
Restricted Cash and Cash Equivalents Items [Line Items]        
Restricted cash 218,654 218,896    
Restricted Cash and Cash Equivalents Pledged as Restricted Collateral for Borrowings [Member]        
Restricted Cash and Cash Equivalents Items [Line Items]        
Restricted cash 134,853 162,759    
Restricted Cash and Cash Equivalents Held by Counterparties [Member]        
Restricted Cash and Cash Equivalents Items [Line Items]        
Restricted cash 381,317 407,965    
Restricted Cash and Cash Equivalents for Lease [Member]        
Restricted Cash and Cash Equivalents Items [Line Items]        
Restricted cash $ 347 $ 347