Securities - Unrealized Loss Positions (Details)	6 Months Ended
	Jun. 30, 2022 USD ($) security	Dec. 31, 2021 USD ($)
Fair value
Less Than 12 Months, Fair Value	$ 388,306,000	$ 198,937,000
12 Months or More, Fair Value	61,715,000	18,485,000
Total Fair Value	450,021,000	217,422,000
Unrealized Loss
Less Than 12 Months, Unrealized Loss	22,960,000	2,417,000
12 Months or More, Unrealized Loss	8,044,000	524,000
Total Unrealized Loss	$ 31,004,000	2,941,000
Other information
Number of positions considered temporarily impaired | security	495
Number of position significant relative to carrying value	0
Debt securities considered temporarily impaired	$ 450,021,000	217,422,000
Other than temporary impairment	0
U.S. Treasury securities
Fair value
Less Than 12 Months, Fair Value	57,130,000
Total Fair Value	57,130,000
Unrealized Loss
Less Than 12 Months, Unrealized Loss	1,008,000
Total Unrealized Loss	1,008,000
Other information
Debt securities considered temporarily impaired	57,130,000
U.S. government agencies and corporations
Fair value
Less Than 12 Months, Fair Value	73,935,000	46,561,000
12 Months or More, Fair Value	27,788,000	10,604,000
Total Fair Value	101,723,000	57,165,000
Unrealized Loss
Less Than 12 Months, Unrealized Loss	4,163,000	945,000
12 Months or More, Unrealized Loss	4,504,000	394,000
Total Unrealized Loss	8,667,000	1,339,000
Other information
Debt securities considered temporarily impaired	101,723,000	57,165,000
Mortgage-backed securities
Fair value
Less Than 12 Months, Fair Value	168,330,000	126,873,000
12 Months or More, Fair Value	25,895,000	5,178,000
Total Fair Value	194,225,000	132,051,000
Unrealized Loss
Less Than 12 Months, Unrealized Loss	12,040,000	1,127,000
12 Months or More, Unrealized Loss	2,701,000	74,000
Total Unrealized Loss	14,741,000	1,201,000
Other information
Debt securities considered temporarily impaired	194,225,000	132,051,000
Obligations of states and political subdivisions
Fair value
Less Than 12 Months, Fair Value	67,489,000	16,578,000
12 Months or More, Fair Value	6,653,000	2,703,000
Total Fair Value	74,142,000	19,281,000
Unrealized Loss
Less Than 12 Months, Unrealized Loss	4,424,000	224,000
12 Months or More, Unrealized Loss	718,000	56,000
Total Unrealized Loss	5,142,000	280,000
Other information
Debt securities considered temporarily impaired	74,142,000	19,281,000
Corporate and other debt securities
Fair value
Less Than 12 Months, Fair Value	21,422,000	8,925,000
12 Months or More, Fair Value	1,379,000
Total Fair Value	22,801,000	8,925,000
Unrealized Loss
Less Than 12 Months, Unrealized Loss	1,325,000	121,000
12 Months or More, Unrealized Loss	121,000
Total Unrealized Loss	1,446,000	121,000
Other information
Debt securities considered temporarily impaired	$ 22,801,000	$ 8,925,000