Deposits - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Banking and Thrift [Abstract]
Brokered deposit placement fee	$ 2,600,000	$ 2,700,000
Third party broker fees paid	2,800,000	$ 0
Deposits exceeding FDIC insurance limits	251,500,000		$ 709,900,000
Accrued interest on deposits	24,600,000		15,700,000
Deposits - non-interest bearing	$ 963,000		$ 701,000