Covered Assets and Indemnification Asset - Covered OREO (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Activity in covered OREO
Balance, beginning of period	$ 51,642	$ 99,090
Additions to covered OREO	1,723	4,542
Dispositions of covered OREO	(6,799)	(14,977)
Valuation adjustments in the period	(1,192)	(9,765)
Balance, end of period	$ 45,374	$ 78,890