Fair Value - Changes in Level 3 Assets Measured at Fair Value on a Recurring Basis (Details) - Recurring Basis [Member] - Level 3 [Member] - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015
MSR [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance		$ 74,007	$ 64,358
Total net (loss) gain included in Mortgage banking, net	[1]	(10,513)	(7,949)
Additions		16,745	17,598
Sales		0	0
Ending Balance		80,239	74,007
The amount of total gains (losses) for the period included in earnings that are attributable to the change in unrealized gains or losses still held, end of period		(407)	1,578
Other Assets - Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance		1,113	1,299
Total net (loss) gain included in Mortgage banking, net	[1]	10,128	6,900
Additions		0	0
Sales		(10,240)	(7,086)
Ending Balance		1,001	1,113
The amount of total gains (losses) for the period included in earnings that are attributable to the change in unrealized gains or losses still held, end of period		$ 753	$ (419)

[1] Total net (loss) gain included in Mortgage banking, net relating to the MSR includes changes in fair value due to market changes and due to run-off.