Securities - Scheduled Maturities of Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Amortized Cost
Due in one year or less	$ 61,441
Due after one year through five years	78,391
Due after five years through 10 years	106,088
Over 10 years	15,158
Subtotal	261,078
Total available for sale securities	401,844	$ 337,184
Fair Value
Due in one year or less	61,631
Due after one year through five years	82,244
Due after five years through 10 years	111,699
Over 10 years	15,887
Subtotal	271,461
Fair value	416,319	339,937
Amortized Cost
Due in one year or less	0
Due after one year through five years	0
Due after five years through 10 years	0
Over 10 years	0
Subtotal	0
Mortgage-backed securities	0
Amortized Cost	0	86,579
Fair Value
Due in one year or less	0
Due after one year through five years	0
Due after five years through 10 years	0
Over 10 years	0
Subtotal	0
Mortgage-backed securities	0
Fair value	0	86,817
Collateralized mortgage obligations
Amortized Cost
Without single maturity date	5,428
Total available for sale securities	5,428	16,400
Fair Value
Without single maturity date	5,560
Fair value	5,560	16,397
Mortgage-backed securities
Amortized Cost
Without single maturity date	135,338
Total available for sale securities	135,338	179,546
Fair Value
Without single maturity date	139,298
Fair value	139,298	179,625
Amortized Cost
Amortized Cost	0	63,297
Fair Value
Fair value	$ 0	$ 63,385