Fair Value Measurement of Assets and Liabilities - Recurring and Non-Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Investment securities:
Equity securities	$ 61,010	$ 48,731
Trading debt securities	3,409	13,438
Available for sale debt securities:
Available for sale debt securities	1,236,946	1,261,397
Non-recurring fair value measurements:
Unpaid principal balances of loans held for sale	23,000	17,900
U.S. Treasury securities
Available for sale debt securities:
Available for sale debt securities	282,398	279,498
U.S. government agency securities
Available for sale debt securities:
Available for sale debt securities	24,192	26,964
Obligations of states and political subdivisions
Available for sale debt securities:
Available for sale debt securities	171,043	146,811
Residential mortgage-backed securities
Available for sale debt securities:
Available for sale debt securities	594,636	629,818
Corporate and other debt securities
Available for sale debt securities:
Available for sale debt securities	164,677	178,306
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Recurring fair value measurements
Investment securities:
Equity securities	23,635	23,494
Trading debt securities	3,409	3,282
Available for sale debt securities:
Available for sale debt securities	282,398	279,498
Loans held for sale	0	0
Other assets	0	0
Total assets	309,442	306,274
Liabilities
Other liabilities	0	0
Total liabilities	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Recurring fair value measurements \| U.S. Treasury securities
Available for sale debt securities:
Available for sale debt securities	282,398	279,498
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Recurring fair value measurements \| U.S. government agency securities
Available for sale debt securities:
Available for sale debt securities	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Recurring fair value measurements \| Obligations of states and political subdivisions
Available for sale debt securities:
Available for sale debt securities	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Recurring fair value measurements \| Residential mortgage-backed securities
Available for sale debt securities:
Available for sale debt securities	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Recurring fair value measurements \| Corporate and other debt securities
Available for sale debt securities:
Available for sale debt securities	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Non-recurring fair value measurements
Liabilities
Non-performing loans held for sale	0
Non-recurring fair value measurements:
Non-performing loans held for sale	0
Collateral dependent loans	0	0
Foreclosed assets	0	0
Total	0	0
Significant Other Observable Inputs (Level 2) \| Recurring fair value measurements
Investment securities:
Equity securities	0	0
Trading debt securities	0	10,156
Available for sale debt securities:
Available for sale debt securities	954,548	981,899
Loans held for sale	23,044	18,118
Other assets	571,620	467,127
Total assets	1,549,212	1,477,300
Liabilities
Other liabilities	599,226	607,237
Total liabilities	599,226	607,237
Significant Other Observable Inputs (Level 2) \| Recurring fair value measurements \| U.S. Treasury securities
Available for sale debt securities:
Available for sale debt securities	0	0
Significant Other Observable Inputs (Level 2) \| Recurring fair value measurements \| U.S. government agency securities
Available for sale debt securities:
Available for sale debt securities	24,192	26,964
Significant Other Observable Inputs (Level 2) \| Recurring fair value measurements \| Obligations of states and political subdivisions
Available for sale debt securities:
Available for sale debt securities	171,043	146,811
Significant Other Observable Inputs (Level 2) \| Recurring fair value measurements \| Residential mortgage-backed securities
Available for sale debt securities:
Available for sale debt securities	594,636	629,818
Significant Other Observable Inputs (Level 2) \| Recurring fair value measurements \| Corporate and other debt securities
Available for sale debt securities:
Available for sale debt securities	164,677	178,306
Significant Other Observable Inputs (Level 2) \| Non-recurring fair value measurements
Liabilities
Non-performing loans held for sale	10,000
Non-recurring fair value measurements:
Non-performing loans held for sale	10,000
Collateral dependent loans	0	0
Foreclosed assets	0	0
Total	10,000	0
Significant Unobservable Inputs (Level 3) \| Recurring fair value measurements
Investment securities:
Equity securities	0	0
Trading debt securities	0	0
Available for sale debt securities:
Available for sale debt securities	0	0
Loans held for sale	0	0
Other assets	0	0
Total assets	0	0
Liabilities
Other liabilities	0	0
Total liabilities	0	0
Significant Unobservable Inputs (Level 3) \| Recurring fair value measurements \| U.S. Treasury securities
Available for sale debt securities:
Available for sale debt securities	0	0
Significant Unobservable Inputs (Level 3) \| Recurring fair value measurements \| U.S. government agency securities
Available for sale debt securities:
Available for sale debt securities	0	0
Significant Unobservable Inputs (Level 3) \| Recurring fair value measurements \| Obligations of states and political subdivisions
Available for sale debt securities:
Available for sale debt securities	0	0
Significant Unobservable Inputs (Level 3) \| Recurring fair value measurements \| Residential mortgage-backed securities
Available for sale debt securities:
Available for sale debt securities	0	0
Significant Unobservable Inputs (Level 3) \| Recurring fair value measurements \| Corporate and other debt securities
Available for sale debt securities:
Available for sale debt securities	0	0
Significant Unobservable Inputs (Level 3) \| Non-recurring fair value measurements
Liabilities
Non-performing loans held for sale	0
Non-recurring fair value measurements:
Non-performing loans held for sale	0
Collateral dependent loans	63,972	92,923
Foreclosed assets	2,132	1,937
Total	66,104	94,860
Fair Value \| Recurring fair value measurements
Investment securities:
Trading debt securities	3,409	13,438
Available for sale debt securities:
Available for sale debt securities	1,236,946	1,261,397
Loans held for sale	23,044	18,118
Other assets	571,620	467,127
Total assets	1,870,982	1,793,673
Liabilities
Other liabilities	599,226	607,237
Total liabilities	599,226	607,237
Fair Value \| Recurring fair value measurements \| U.S. Treasury securities
Available for sale debt securities:
Available for sale debt securities	282,398	279,498
Fair Value \| Recurring fair value measurements \| U.S. government agency securities
Available for sale debt securities:
Available for sale debt securities	24,192	26,964
Fair Value \| Recurring fair value measurements \| Obligations of states and political subdivisions
Available for sale debt securities:
Available for sale debt securities	171,043	146,811
Fair Value \| Recurring fair value measurements \| Residential mortgage-backed securities
Available for sale debt securities:
Available for sale debt securities	594,636	629,818
Fair Value \| Recurring fair value measurements \| Corporate and other debt securities
Available for sale debt securities:
Available for sale debt securities	164,677	178,306
Fair Value \| Non-recurring fair value measurements
Liabilities
Non-performing loans held for sale	10,000
Non-recurring fair value measurements:
Non-performing loans held for sale	10,000
Collateral dependent loans	63,972	92,923
Foreclosed assets	2,132	1,937
Total	76,104	94,860
Fair Value \| Fair Value, Inputs, Level 1, Level 2, and Level 3 \| Recurring fair value measurements
Investment securities:
Equity securities	23,635	23,494
Fair Value \| Significant Unobservable Inputs (Level 3)
Investment securities:
Equity securities	25,047	15,138
Fair Value \| NAV \| Recurring fair value measurements
Investment securities:
Equity securities	$ 12,328	$ 10,099

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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