Deposits - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Deposits [Abstract]
Stable interest-bearing deposits	$ 1,500,000
Aggregate of deposits of individual depositors	5,400,000
Brokered deposit placement fee	10,100	$ 10,500	$ 10,300
Third party broker fees paid	4,400	4,100	$ 15,200
Deposits exceeding FDIC insurance limits	304,500	709,900
Accrued interest on deposits	18,900	15,700
Deposits - non-interest bearing	$ 677	$ 701