Covered Assets and Indemnification Asset - FDIC Indemnification Asset (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Activity in the FDIC Indemnification Asset
Balance, beginning of period	$ 71,313	$ 91,648
FDIC Indemnification Asset accretion (amortization)	(3,949)	87
Transfers to due from FDIC and other	(19,424)	(11,213)
Balance, end of period	47,940	$ 80,522
FDIC, collections received	$ 140,300