Securities (Details 2) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Investment securities with unrealized losses
Fair Value, Less Than 12 Months	$ 334,866	$ 91,251
Unrealized Losses, Less Than 12 Months	(5,182)	(506)
Fair Value, 12 Months or Longer	262	0
Unrealized Losses, 12 Months or Longer	(4)	0
Fair Value, Total	335,128	91,251
Unrealized Losses, Total	(5,186)	(506)
U.S. Treasury and U.S. government sponsored entities
Investment securities with unrealized losses
Fair Value, Less Than 12 Months	13,876	8,153
Unrealized Losses, Less Than 12 Months	(318)	(54)
Fair Value, 12 Months or Longer	0	0
Unrealized Losses, 12 Months or Longer	0	0
Fair Value, Total	13,876	8,153
Unrealized Losses, Total	(318)	(54)
State and political subdivisions
Investment securities with unrealized losses
Fair Value, Less Than 12 Months	65,009	19,205
Unrealized Losses, Less Than 12 Months	(951)	(204)
Fair Value, 12 Months or Longer	0	0
Unrealized Losses, 12 Months or Longer	0	0
Fair Value, Total	65,009	19,205
Unrealized Losses, Total	(951)	(204)
Mortgage-backed securities - residential
Investment securities with unrealized losses
Fair Value, Less Than 12 Months	255,143	63,401
Unrealized Losses, Less Than 12 Months	(3,896)	(243)
Fair Value, 12 Months or Longer	0	0
Unrealized Losses, 12 Months or Longer	0	0
Fair Value, Total	255,143	63,401
Unrealized Losses, Total	(3,896)	(243)
Collateralized mortgage obligations - residential
Investment securities with unrealized losses
Fair Value, Less Than 12 Months	0	294
Unrealized Losses, Less Than 12 Months	0	(3)
Fair Value, 12 Months or Longer	262	0
Unrealized Losses, 12 Months or Longer	(4)	0
Fair Value, Total	262	294
Unrealized Losses, Total	(4)	(3)
Corporate bonds
Investment securities with unrealized losses
Fair Value, Less Than 12 Months	838	198
Unrealized Losses, Less Than 12 Months	(17)	(2)
Fair Value, 12 Months or Longer	0	0
Unrealized Losses, 12 Months or Longer	0	0
Fair Value, Total	838	198
Unrealized Losses, Total	$ (17)	$ (2)