Deposits (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Amount of certificates of deposit and other time deposits of $250,000 or more outstanding
Under 3 months	$ 66,085
4-6 months	68,413
7-12 months	64,224
Over 12 months	223,653
Total	422,375	$ 295,420
Maturities of time deposits, including both private and public funds
2016	510,796
2017	225,880
2018	178,987
2019	145,784
2020	74,935
Thereafter	4,362
Total	$ 1,140,744