Securities, AFS Securities in Continuous Unrealized Loss Position (Details) $ in Thousands	Jun. 30, 2020 USD ($) Position	Dec. 31, 2019 USD ($) Position
Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months	$ 20,594	$ 198,501
12 months or longer	3,822	97,243
Total	24,416	295,744
Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	(28)	(718)
12 months or longer	(13)	(815)
Total	$ (41)	$ (1,533)
Unrealized Loss Position, Number of Positions [Abstract]
Less than 12 months | Position	5	48
12 months or longer | Position	3	34
Total | Position	8	82
Federal Agency [Member]
Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months	$ 19,965	$ 14,891
12 months or longer	0	9,866
Total	19,965	24,757
Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	(23)	(109)
12 months or longer	0	(134)
Total	$ (23)	$ (243)
Unrealized Loss Position, Number of Positions [Abstract]
Less than 12 months | Position	2	2
12 months or longer | Position	0	1
Total | Position	2	3
State & Municipal [Member]
Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months		$ 2,503
12 months or longer		0
Total		2,503
Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months		(20)
12 months or longer		0
Total		$ (20)
Unrealized Loss Position, Number of Positions [Abstract]
Less than 12 months | Position		1
12 months or longer | Position		0
Total | Position		1
Mortgage-Backed [Member]
Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months	$ 46	$ 67,986
12 months or longer	779	37,745
Total	825	105,731
Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	0	(273)
12 months or longer	(9)	(122)
Total	$ (9)	$ (395)
Unrealized Loss Position, Number of Positions [Abstract]
Less than 12 months | Position	2	21
12 months or longer | Position	2	16
Total | Position	4	37
Collateralized Mortgage Obligations [Member]
Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months	$ 583	$ 113,121
12 months or longer	3,043	49,632
Total	3,626	162,753
Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	(5)	(316)
12 months or longer	(4)	(559)
Total	$ (9)	$ (875)
Unrealized Loss Position, Number of Positions [Abstract]
Less than 12 months | Position	1	24
12 months or longer | Position	1	17
Total | Position	2	41