Deposits (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Amount of certificates of deposit and other time deposits of $250,000 or more outstanding
Under 3 months	$ 199,375
4-6 months	170,902
7-12 months	156,874
Over 12 months	222,284
Total	749,435	$ 666,890
Maturities of time deposits, including both private and public funds
2020	1,256,577
2021	227,115
2022	105,218
2023	49,999
2024	7,496
Thereafter	2,093
Total	$ 1,648,498	$ 1,467,766