Deposits - Scheduled Maturities of Time Deposits (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Maturity
Three months or less	$ 255,410
Over three through six months	154,609
Over six through twelve months	162,468
Total due in 2018	572,487
2019	109,815
2020	21,665
2021	23,345
2022	20,553
2023	385
Total	748,250	$ 870,788
Less than $250,000
Maturity
Three months or less	144,123
Over three through six months	104,497
Over six through twelve months	120,065
Total due in 2018	368,685
2019	101,077
2020	19,006
2021	19,343
2022	18,064
2023	385
Total	526,560
$250,000 and over
Maturity
Three months or less	111,287
Over three through six months	50,112
Over six through twelve months	42,403
Total due in 2018	203,802
2019	8,738
2020	2,659
2021	4,002
2022	2,489
2023	0
Total	$ 221,690