Fair Value - Fair value of derivatives is based on valuation models using observable market data as of the measurement date (Level 2 inputs) (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Fair value measurement
Securities available-for-sale	$ 1,331,985	$ 1,364,734
U.S. Government agencies
Fair value measurement
Securities available-for-sale	106,281	120,123
Mortgage Backed Securities - residential
Fair value measurement
Securities available-for-sale	618,969	626,428
Mortgage Backed Securities - commercial
Fair value measurement
Securities available-for-sale	11,309	15,671
Collateralized Mortgage Obligations
Fair value measurement
Securities available-for-sale	206,360	175,005
State and municipal obligations
Fair value measurement
Securities available-for-sale	348,815	380,098
Municipal taxable
Fair value measurement
Securities available-for-sale	32,606	38,626
U.S. Treasury
Fair value measurement
Securities available-for-sale	2,056	204
Collateralized debt obligations
Fair value measurement
Securities available-for-sale	3,111	3,359
Other securities
Fair value measurement
Securities available-for-sale	2,478	5,220
Level 2
Fair value measurement
Securities available-for-sale	1,324,851	1,357,737
Derivative Assets	3,555	1,030
Derivative Liability	(3,555)	(1,030)
Level 2 | U.S. Government agencies
Fair value measurement
Securities available-for-sale	106,281	120,123
Level 2 | Mortgage Backed Securities - residential
Fair value measurement
Securities available-for-sale	618,969	626,428
Level 2 | Mortgage Backed Securities - commercial
Fair value measurement
Securities available-for-sale	11,309	15,671
Level 2 | Collateralized Mortgage Obligations
Fair value measurement
Securities available-for-sale	206,360	175,005
Level 2 | State and municipal obligations
Fair value measurement
Securities available-for-sale	347,270	378,203
Level 2 | Municipal taxable
Fair value measurement
Securities available-for-sale	32,606	38,626
Level 2 | U.S. Treasury
Fair value measurement
Securities available-for-sale	2,056	204
Level 2 | Other securities
Fair value measurement
Securities available-for-sale		3,477
Level 3
Fair value measurement
Securities available-for-sale	7,134	6,997
Level 3 | State and municipal obligations
Fair value measurement
Securities available-for-sale	1,545	1,895
Level 3 | Collateralized debt obligations
Fair value measurement
Securities available-for-sale	3,111	3,359
Level 3 | Other securities
Fair value measurement
Securities available-for-sale	$ 2,478	$ 1,743