Quarterly report pursuant to Section 13 or 15(d)

Schedule of Restricted Cash and Cash Equivalents (Details)

v3.10.0.1
Schedule of Restricted Cash and Cash Equivalents (Details) - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Restricted Cash and Cash Equivalents Items [Line Items]    
Restricted cash $ 564,705 $ 635,836
Restricted Cash and Cash Equivalents Held for Securities Trading Activity [Member]    
Restricted Cash and Cash Equivalents Items [Line Items]    
Restricted cash 27,050 27,050
Restricted Cash and Cash Equivalents Held for Derivatives Trading Activity [Member]    
Restricted Cash and Cash Equivalents Items [Line Items]    
Restricted cash 187,769 191,421
Restricted Cash and Cash Equivalents Pledged as Restricted Collateral for Borrowings [Member]    
Restricted Cash and Cash Equivalents Items [Line Items]    
Restricted cash 349,539 417,018
Restricted Cash and Cash Equivalents Held by Counterparties [Member]    
Restricted Cash and Cash Equivalents Items [Line Items]    
Restricted cash 564,358 635,489
Restricted Cash and Cash Equivalents for Lease [Member]    
Restricted Cash and Cash Equivalents Items [Line Items]    
Restricted cash $ 347 $ 347