Purchase Credit Impaired ("PCI") Loans - Summary of FDIC Loss Share Receivable (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Financing Receivable, Impaired [Line Items]
Total Cash received from FDIC for covered assets	$ 3,528
Reductions for loss share termination	(5,922)	$ 0
FDIC Indemnification Asset [Roll Forward]
Balance at beginning of period	15,866	34,319
Cash received from the FDIC for covered assets	(2,275)	(9,605)	$ (10,981)
FDIC reimbursable losses (recoveries)	(1,386)	459
Amortization, net	(2,293)	(6,342)
Loan impairment (impairment reversal)	(1,113)	841
Reductions for payments on covered assets in excess of expected cash flows	(1,624)	(3,806)
Balance at end of period	$ 0	$ 15,866	$ 34,319