Quarterly report pursuant to Section 13 or 15(d)

Schedule of Restricted Cash and Cash Equivalents (Details)

v3.19.1
Schedule of Restricted Cash and Cash Equivalents (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Restricted Cash and Cash Equivalents Items [Line Items]    
Restricted cash $ 266,752 $ 688,006
Restricted Cash and Cash Equivalents Held for Securities Trading Activity [Member]    
Restricted Cash and Cash Equivalents Items [Line Items]    
Restricted cash 45,050 51,350
Restricted Cash and Cash Equivalents Held for Derivatives Trading Activity [Member]    
Restricted Cash and Cash Equivalents Items [Line Items]    
Restricted cash 155,346 219,900
Restricted Cash and Cash Equivalents Pledged as Restricted Collateral for Borrowings [Member]    
Restricted Cash and Cash Equivalents Items [Line Items]    
Restricted cash 66,296 416,696
Restricted Cash and Cash Equivalents Held by Counterparties [Member]    
Restricted Cash and Cash Equivalents Items [Line Items]    
Restricted cash 266,692 687,946
Restricted Cash and Cash Equivalents for Lease [Member]    
Restricted Cash and Cash Equivalents Items [Line Items]    
Restricted cash $ 60 $ 60