Securities - HTM in an Unrealized Loss Position (Details) $ in Thousands	Jun. 30, 2020 USD ($) item	Dec. 31, 2019 USD ($) item
Number of Securities
Unrealized loss for less than twelve months | item	13	52
Unrealized loss for twelve months or longer | item		12
Total | item	13	64
Fair Value
Unrealized loss for less than twelve months	$ 4,169	$ 94,175
Unrealized loss for twelve months or longer		60,659
Total	4,169	154,834
Unrealized Losses
Unrealized loss for less than twelve months	29	1,102
Unrealized loss for twelve months or longer		648
Total	$ 29	$ 1,750
Bonds
Number of Securities
Unrealized loss for less than twelve months | item		2
Total | item		2
Fair Value
Unrealized loss for less than twelve months		$ 9,665
Total		9,665
Unrealized Losses
Unrealized loss for less than twelve months		35
Total		$ 35
Commercial mortgage-backed securities
Number of Securities
Unrealized loss for less than twelve months | item		8
Total | item		8
Fair Value
Unrealized loss for less than twelve months		$ 44,610
Total		44,610
Unrealized Losses
Unrealized loss for less than twelve months		656
Total		$ 656
Collateralized Mortgage Obligations
Number of Securities
Unrealized loss for less than twelve months | item		4
Unrealized loss for twelve months or longer | item		8
Total | item		12
Fair Value
Unrealized loss for less than twelve months		$ 23,904
Unrealized loss for twelve months or longer		59,560
Total		83,464
Unrealized Losses
Unrealized loss for less than twelve months		287
Unrealized loss for twelve months or longer		617
Total		$ 904
States and political subdivisions
Number of Securities
Unrealized loss for less than twelve months | item	13	38
Unrealized loss for twelve months or longer | item		4
Total | item	13	42
Fair Value
Unrealized loss for less than twelve months	$ 4,169	$ 15,996
Unrealized loss for twelve months or longer		1,099
Total	4,169	17,095
Unrealized Losses
Unrealized loss for less than twelve months	29	124
Unrealized loss for twelve months or longer		31
Total	$ 29	$ 155