FDIC Indemnification Asset (Changes in the FDIC Indemnification Asset) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
FDIC Indemnification Asset [Roll Forward]
FDIC Indemnification Asset and Liability, net	$ 739,843	$ 974,335	$ 1,205,117
Amortization of FDIC indemnification asset	(160,091)	(109,411)	(69,470)
Decrease in FDIC indemnification asset for claims filed	(46,083)	(59,139)	(114,916)
Net loss on FDIC indemnification	(17,759)	(65,942)	(46,396)
FDIC Indemnification Asset and Liability, net	$ 515,910	$ 739,843	$ 974,335