Quarterly report pursuant to Section 13 or 15(d)

Schedule of Restricted Cash and Cash Equivalents (Details)

v3.8.0.1
Schedule of Restricted Cash and Cash Equivalents (Details) - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Sep. 30, 2016
Dec. 31, 2015
Restricted Cash and Cash Equivalents Items [Line Items]        
Restricted cash $ 343,813 $ 408,312 $ 264,872 $ 262,562
Restricted Cash and Cash Equivalents Held for Securities Trading Activity [Member]        
Restricted Cash and Cash Equivalents Items [Line Items]        
Restricted cash 27,823 26,310    
Restricted Cash and Cash Equivalents Held for Derivatives Trading Activity [Member]        
Restricted Cash and Cash Equivalents Items [Line Items]        
Restricted cash 165,799 218,896    
Restricted Cash and Cash Equivalents Pledged as Restricted Collateral for Borrowings [Member]        
Restricted Cash and Cash Equivalents Items [Line Items]        
Restricted cash 149,844 162,759    
Restricted Cash and Cash Equivalents Held by Counterparties [Member]        
Restricted Cash and Cash Equivalents Items [Line Items]        
Restricted cash 343,466 407,965    
Restricted Cash and Cash Equivalents for Lease [Member]        
Restricted Cash and Cash Equivalents Items [Line Items]        
Restricted cash $ 347 $ 347