Securities - Schedule of Securities with Unrealized Losses (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Available-for-sale securities
Fair Value, Less than 12 Months	$ 106,458	$ 241,757
Unrealized Losses, Less than 12 Months	1,177	1,371
Fair Value, 12 Months or Longer	15,150	288,210
Unrealized Losses, 12 Months or Longer	451	3,747
Fair Value	121,608	529,967
Unrealized Losses	1,628	5,118
Obligations of U.S. Government sponsored entities
Available-for-sale securities
Fair Value, Less than 12 Months	20,412	18,654
Unrealized Losses, Less than 12 Months	20	76
Fair Value, 12 Months or Longer	0	3,479
Unrealized Losses, 12 Months or Longer	0	8
Fair Value	20,412	22,133
Unrealized Losses	20	84
Obligations of U.S. states and political subdivisions
Available-for-sale securities
Fair Value, Less than 12 Months	9,750	10,456
Unrealized Losses, Less than 12 Months	60	54
Fair Value, 12 Months or Longer	0	2,300
Unrealized Losses, 12 Months or Longer	0	7
Fair Value	9,750	12,756
Unrealized Losses	60	61
U.S. Government agencies
Available-for-sale securities
Fair Value, Less than 12 Months	43,968	54,846
Unrealized Losses, Less than 12 Months	694	489
Fair Value, 12 Months or Longer	5,627	45,999
Unrealized Losses, 12 Months or Longer	247	1,030
Fair Value	49,595	100,845
Unrealized Losses	941	1,519
U.S. Government sponsored entities
Available-for-sale securities
Fair Value, Less than 12 Months	32,328	157,801
Unrealized Losses, Less than 12 Months	403	752
Fair Value, 12 Months or Longer	7,159	233,999
Unrealized Losses, 12 Months or Longer	68	2,635
Fair Value	39,487	391,800
Unrealized Losses	471	3,387
U.S. corporate debt securities
Available-for-sale securities
Fair Value, Less than 12 Months	0	0
Unrealized Losses, Less than 12 Months	0	0
Fair Value, 12 Months or Longer	2,364	2,433
Unrealized Losses, 12 Months or Longer	136	67
Fair Value	2,364	2,433
Unrealized Losses	$ 136	$ 67