Purchased Credit Impaired ("PCI") Loans - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
FDIC proceeds from loss share termination [Line Items]
Removal of remaining clawback liability, FDIC loss share termination		$ 3,500
Removal of remaining FDIC receivable, FDIC loss share termination		7,200
One-time pretax charge		2,400
PCI loans outstanding	$ 54,600	98,600
Net payment received from FDIC for loss share termination		1,300
Expense recorded related to Clawback Liability	$ 0	$ 760	$ 1,201