Deposits (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Amount of certificates of deposit and other time deposits of $250,000 or more outstanding
Under 3 months	$ 67,857
4-6 months	68,413
7-12 months	48,088
Over 12 months	163,939
Total	348,297	$ 422,380
Maturities of time deposits, including both private and public funds
2017	581,280
2018	199,166
2019	170,303
2020	83,801
2021	14,528
Thereafter	7,574
Total	$ 1,056,652	$ 1,140,744