Securities - Amortized Cost and Estimated Fair Value by Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Available for Sale, Amortized Cost
Amortized Cost	$ 317,528	$ 268,984
Available for Sale, Estimated Fair Value
Total	315,580	262,967
Held to Maturity, Amortized Cost
Total		43,503
Held to Maturity, Estimated Fair Value
Total		42,990
Mortgage-Backed Securities
Available for Sale, Amortized Cost
Due within one year	0	0
Due after one through five years	13,360	7,204
Due after five through ten years	6,261	11,862
Due after ten years	148,450	139,092
Amortized Cost	168,071	158,158
Available for Sale, Estimated Fair Value
Due within one year	0	0
Due after one through five years	13,391	7,089
Due after five through ten years	6,257	11,637
Due after ten years	148,835	135,339
Total	168,483	154,065
Held to Maturity, Amortized Cost
Due within one year		0
Due after one through five years		578
Due after five through ten years		2,035
Due after ten years		28,669
Total		31,282
Held to Maturity, Estimated Fair Value
Due within one year		0
Due after one through five years		569
Due after five through ten years		1,978
Due after ten years		28,180
Total		30,727
Investment Securities
Available for Sale, Amortized Cost
Due within one year	0	0
Due after one through five years	2,043	0
Due after five through ten years	58,460	19,564
Due after ten years	88,954	91,262
Amortized Cost	149,457	110,826
Available for Sale, Estimated Fair Value
Due within one year	0	0
Due after one through five years	2,084	0
Due after five through ten years	57,680	19,362
Due after ten years	87,333	89,540
Total	$ 147,097	108,902
Held to Maturity, Amortized Cost
Due within one year		0
Due after one through five years		734
Due after five through ten years		6,728
Due after ten years		4,759
Total		12,221
Held to Maturity, Estimated Fair Value
Due within one year		0
Due after one through five years		741
Due after five through ten years		6,743
Due after ten years		4,779
Total		$ 12,263