Securities, HTM Securities in Continuous Unrealized Loss Position (Details) $ in Thousands	Dec. 31, 2019 USD ($) Position	Dec. 31, 2018 USD ($) Position
Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months	$ 20,297	$ 23,293
12 months or longer	47,759	286,233
Total	68,056	309,526
Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	(187)	(91)
12 months or longer	(442)	(8,195)
Total	$ (629)	$ (8,286)
Unrealized Loss Position, Number of Positions [Abstract]
Less than 12 months | Position	7	32
12 months or longer | Position	7	118
Total | Position	14	150
Mortgage-Backed [Member]
Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months	$ 0	$ 0
12 months or longer	25,370	82,579
Total	25,370	82,579
Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	0	0
12 months or longer	(155)	(2,773)
Total	$ (155)	$ (2,773)
Unrealized Loss Position, Number of Positions [Abstract]
Less than 12 months | Position	0	0
12 months or longer | Position	2	6
Total | Position	2	6
Collateralized Mortgage Obligations [Member]
Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months	$ 18,040	$ 4,386
12 months or longer	22,389	145,396
Total	40,429	149,782
Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	(181)	(7)
12 months or longer	(287)	(3,890)
Total	$ (468)	$ (3,897)
Unrealized Loss Position, Number of Positions [Abstract]
Less than 12 months | Position	3	2
12 months or longer | Position	5	26
Total | Position	8	28
State & Municipal [Member]
Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months	$ 2,257	$ 18,907
12 months or longer	0	58,258
Total	2,257	77,165
Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	(6)	(84)
12 months or longer	0	(1,532)
Total	$ (6)	$ (1,616)
Unrealized Loss Position, Number of Positions [Abstract]
Less than 12 months | Position	4	30
12 months or longer | Position	0	86
Total | Position	4	116