Annual report pursuant to Section 13 and 15(d)

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation (Details)

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Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Available-for-sale Securities [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning of period level 3 fair value $ 0 $ 0
Realized (losses) gains 0 0
Unrealized (losses) gains 0 0
Total gains (losses) included in net income 0 0
Other comprehensive income (loss) 141 0
Purchases 153,000 0
Sales 0 0
Settlements 0 0
Gross transfers into level 3 0 0
Gross transfers out of level 3 0 0
End of period level 3 fair value 153,141 0
Change in unrealized gains or losses for the period included in earnings for assets held at the end of the reporting period 141 0
Servicing Contracts [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning of period level 3 fair value 693,815 493,688
Realized (losses) gains (97,372) (100,103)
Unrealized (losses) gains 6,339 16,572
Total gains (losses) included in net income (91,033) (83,531)
Other comprehensive income (loss) 0 0
Purchases 499,886 313,504
Sales (355) (40,137)
Settlements (15,596) 10,291
Gross transfers into level 3 0 0
Gross transfers out of level 3 0 0
End of period level 3 fair value 1,086,717 693,815
Change in unrealized gains or losses for the period included in earnings for assets held at the end of the reporting period 5,870 13,906
Loans Receivable [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning of period level 3 fair value 39,221 47,112
Realized (losses) gains 1,780 4,451
Unrealized (losses) gains 726 (135)
Total gains (losses) included in net income 2,506 4,316
Other comprehensive income (loss) 0 0
Purchases 575 183,074
Sales (3,717) (98,338)
Settlements (8,645) (96,943)
Gross transfers into level 3 0 0
Gross transfers out of level 3 0 0
End of period level 3 fair value 29,940 39,221
Change in unrealized gains or losses for the period included in earnings for assets held at the end of the reporting period $ 916 $ 168