Debt Securities - Available for Sale Securities in Continuous Loss Position (Details) $ in Thousands	Mar. 31, 2020 USD ($) security	Dec. 31, 2019 USD ($) security
Schedule of Available-for-sale Securities
Number of Securities | security	122	94
Less than 12 Months, Fair Value	$ 202,557	$ 138,531
Less than 12 Months, Accumulated Losses	5,784	1,067
12 Months or More, Fair Value	1,333	77,869
12 Months or More, Accumulated Loss	85	1,376
Fair Value	203,890	216,400
Unrealized Losses	$ 5,869	$ 2,443
State and political subdivisions
Schedule of Available-for-sale Securities
Number of Securities | security	77	47
Less than 12 Months, Fair Value	$ 33,845	$ 27,161
Less than 12 Months, Accumulated Losses	1,209	322
12 Months or More, Fair Value		2,112
12 Months or More, Accumulated Loss	0	26
Fair Value	33,845	29,273
Unrealized Losses	$ 1,209	$ 348
Mortgage-backed securities
Schedule of Available-for-sale Securities
Number of Securities | security	9	7
Less than 12 Months, Fair Value	$ 404	$ 963
Less than 12 Months, Accumulated Losses	2	12
12 Months or More, Fair Value	17	1,365
12 Months or More, Accumulated Loss	0	3
Fair Value	421	2,328
Unrealized Losses	$ 2	$ 15
Collateralized mortgage obligations
Schedule of Available-for-sale Securities
Number of Securities | security	8	33
Less than 12 Months, Fair Value	$ 62,873	$ 103,395
Less than 12 Months, Accumulated Losses	1,231	719
12 Months or More, Fair Value		65,604
12 Months or More, Accumulated Loss	0	1,246
Fair Value	62,873	168,999
Unrealized Losses	$ 1,231	$ 1,965
Corporate debt securities
Schedule of Available-for-sale Securities
Number of Securities | security	28	7
Less than 12 Months, Fair Value	$ 105,435	$ 7,012
Less than 12 Months, Accumulated Losses	3,342	14
12 Months or More, Fair Value	1,316	8,788
12 Months or More, Accumulated Loss	85	101
Fair Value	106,751	15,800
Unrealized Losses	$ 3,427	$ 115