Securities - Contractual Maturities and Gross Realized Gains and Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Amortized Cost
Due in one year or less	$ 48,902
Due after one year through five years	149,981
Due after five years through ten years	14,338
Due after ten years	3,429
Amortized Cost	216,650	$ 218,168
Fair Value
Due in one year or less	48,832
Due after one year through five years	148,258
Due after five years through ten years	14,313
Due after ten years	3,507
Fair Value	214,910	218,976
Proceeds from sales, maturities and calls of securities and related gains and losses
Gross realized gains			$ 61
Gross realized losses			(26)
Net realized gains			35
Proceeds from sales of securities			917
Gross realized gains	10	10	17
Net realized gains	10	10	17
Proceeds from maturities, calls and paydowns of securities	$ 51,067	$ 41,520	$ 56,438