Fair Value Measurement of Assets and Liabilities - Recurring and Non-Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Investment securities:
Equity securities	$ 50,152	$ 48,731
Trading debt securities	6,855	13,438
Available for sale debt securities:
Available for sale debt securities	1,259,236	1,261,397
Non-recurring fair value measurements:
Unpaid principal balances of loans held for sale	17,100	17,900
U.S. Treasury securities
Available for sale debt securities:
Available for sale debt securities	286,745	279,498
U.S. government agency securities
Available for sale debt securities:
Available for sale debt securities	26,352	26,964
Obligations of states and political subdivisions
Available for sale debt securities:
Available for sale debt securities	152,775	146,811
Residential mortgage-backed securities
Available for sale debt securities:
Available for sale debt securities	619,776	629,818
Corporate and other debt securities
Available for sale debt securities:
Available for sale debt securities	173,588	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	3,477	3,282
Available for sale debt securities:
Available for sale debt securities	286,745	279,498
Loans held for sale	0	0
Other assets	0	0
Total assets	313,857	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	286,745	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
Non-recurring fair value measurements:
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	3,378	10,156
Available for sale debt securities:
Available for sale debt securities	972,491	981,899
Loans held for sale	17,218	18,118
Other assets	446,749	467,127
Total assets	1,439,836	1,477,300
Liabilities
Other liabilities	494,552	607,237
Total liabilities	494,552	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	26,352	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	152,775	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	619,776	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	173,588	178,306
Significant Other Observable Inputs (Level 2) \| Non-recurring fair value measurements
Non-recurring fair value measurements:
Collateral dependent loans	0	0
Foreclosed assets	0	0
Total	0	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
Non-recurring fair value measurements:
Collateral dependent loans	81,267	92,923
Foreclosed assets	1,752	1,937
Total	83,019	94,860
Carrying Amount \| Significant Unobservable Inputs (Level 3)
Investment securities:
Equity securities	16,342	15,138
Fair Value \| Recurring fair value measurements
Investment securities:
Trading debt securities	6,855	13,438
Available for sale debt securities:
Available for sale debt securities	1,259,236	1,261,397
Loans held for sale	17,218	18,118
Other assets	446,749	467,127
Total assets	1,763,868	1,793,673
Liabilities
Other liabilities	494,552	607,237
Total liabilities	494,552	607,237
Fair Value \| Recurring fair value measurements \| U.S. Treasury securities
Available for sale debt securities:
Available for sale debt securities	286,745	279,498
Fair Value \| Recurring fair value measurements \| U.S. government agency securities
Available for sale debt securities:
Available for sale debt securities	26,352	26,964
Fair Value \| Recurring fair value measurements \| Obligations of states and political subdivisions
Available for sale debt securities:
Available for sale debt securities	152,775	146,811
Fair Value \| Recurring fair value measurements \| Residential mortgage-backed securities
Available for sale debt securities:
Available for sale debt securities	619,776	629,818
Fair Value \| Recurring fair value measurements \| Corporate and other debt securities
Available for sale debt securities:
Available for sale debt securities	173,588	178,306
Fair Value \| Non-recurring fair value measurements
Non-recurring fair value measurements:
Collateral dependent loans	81,267	92,923
Foreclosed assets	1,752	1,937
Total	83,019	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	16,342	15,138
Fair Value \| NAV \| Recurring fair value measurements
Investment securities:
Equity securities	$ 10,175	$ 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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Amount excluding accrued interest, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Carrying amount as of the balance sheet date of all assets obtained in full or partial satisfaction of a debt arrangement through foreclosure proceedings or defeasance; includes real and personal property; equity interests in corporations, partnerships, and joint ventures; and beneficial interests in trusts.

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Fair value of the collateral dependent impaired loans.

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