Securities - AFS 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	5	55
Unrealized loss for twelve months or longer | item	12	16
Total | item	17	71
Fair Value
Unrealized loss for less than twelve months	$ 38,800	$ 165,636
Unrealized loss for twelve months or longer	53,162	60,387
Total	91,962	226,023
Unrealized Loss
Unrealized loss for less than twelve months	201	599
Unrealized loss for twelve months or longer	232	427
Total	$ 433	$ 1,026
Bonds
Number of Securities
Unrealized loss for less than twelve months | item	1	2
Total | item	1	2
Fair Value
Unrealized loss for less than twelve months	$ 5,000	$ 24,937
Total	$ 5,000	24,937
Unrealized Loss
Unrealized loss for less than twelve months		64
Total		$ 64
Residential Mortgage Backed Securities
Number of Securities
Unrealized loss for less than twelve months | item	2	37
Unrealized loss for twelve months or longer | item		2
Total | item	2	39
Fair Value
Unrealized loss for less than twelve months	$ 25,819	$ 36,187
Unrealized loss for twelve months or longer		13,683
Total	25,819	49,870
Unrealized Loss
Unrealized loss for less than twelve months	181	87
Unrealized loss for twelve months or longer		58
Total	$ 181	$ 145
Commercial mortgage-backed securities
Number of Securities
Unrealized loss for less than twelve months | item		1
Total | item		1
Fair Value
Unrealized loss for less than twelve months		$ 9,967
Total		9,967
Unrealized Loss
Unrealized loss for less than twelve months		2
Total		$ 2
Collateralized Mortgage Obligations
Number of Securities
Unrealized loss for less than twelve months | item	2	15
Unrealized loss for twelve months or longer | item	12	13
Total | item	14	28
Fair Value
Unrealized loss for less than twelve months	$ 7,981	$ 94,545
Unrealized loss for twelve months or longer	53,162	46,217
Total	61,143	140,762
Unrealized Loss
Unrealized loss for less than twelve months	20	446
Unrealized loss for twelve months or longer	232	369
Total	$ 252	$ 815
States and political subdivisions
Number of Securities
Unrealized loss for twelve months or longer | item		1
Total | item		1
Fair Value
Unrealized loss for twelve months or longer		$ 487
Total		$ 487