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Fair Value Measurement - Summary of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021 | Mar. 31, 2021 | Dec. 31, 2020
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Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |
Securities available-for-sale, at fair value | $ 1,369,368 | $ 1,454,542 |  |
Equity and other securities, at fair value | 10,677 | 10,578 |  |
Servicing assets, at fair value | 24,497 | 23,744 | $ 22,140 | $ 22,042
Derivative assets | 29,113 | 13,375 |  |
Derivative liabilities | 7,475 | 9,665 |  |
U.S. Treasury Notes |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |
Securities available-for-sale, at fair value | 24,225 | 18,476 |  |
U.S. Government Agencies |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |
Securities available-for-sale, at fair value | 140,240 | 139,390 |  |
Obligations of States, Municipalities, and Political Subdivisions |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |
Securities available-for-sale, at fair value | 82,128 | 89,636 |  |
Corporate Securities |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |
Securities available-for-sale, at fair value | 65,142 | 67,346 |  |
Asset-Backed Securities |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |
Securities available-for-sale, at fair value | 36,659 | 37,251 |  |
Fair Value, Measurements, Recurring |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |
Servicing assets, at fair value | 24,497 | 23,744 |  |
Derivative assets | 29,113 | 13,375 |  |
Derivative liabilities | 7,475 | 9,665 |  |
Fair Value, Measurements, Recurring | U.S. Treasury Notes |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |
Securities available-for-sale, at fair value | 24,225 | 18,476 |  |
Fair Value, Measurements, Recurring | U.S. Government Agencies |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |
Securities available-for-sale, at fair value | 140,240 | 139,390 |  |
Fair Value, Measurements, Recurring | Obligations of States, Municipalities, and Political Subdivisions |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |
Securities available-for-sale, at fair value | 82,128 | 89,636 |  |
Fair Value, Measurements, Recurring | Mortgage-Backed Securities; Residential | Agency |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |
Securities available-for-sale, at fair value | 700,857 | 743,656 |  |
Fair Value, Measurements, Recurring | Mortgage-Backed Securities; Residential | Non-Agency |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |
Securities available-for-sale, at fair value | 130,424 | 145,236 |  |
Fair Value, Measurements, Recurring | Mortgage-Backed Securities; Commercial | Agency |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |
Securities available-for-sale, at fair value | 189,693 | 213,551 |  |
Fair Value, Measurements, Recurring | Corporate Securities |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |
Securities available-for-sale, at fair value | 65,142 | 67,346 |  |
Fair Value, Measurements, Recurring | Asset-Backed Securities |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |
Securities available-for-sale, at fair value | 36,659 | 37,251 |  |
Fair Value, Measurements, Recurring | Mutual Funds |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |
Equity and other securities, at fair value | 4,872 | 4,880 |  |
Fair Value, Measurements, Recurring | Equity Securities |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |
Equity and other securities, at fair value | 5,805 | 5,698 |  |
Fair Value, Measurements, Recurring | Level 1 | U.S. Treasury Notes |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |
Securities available-for-sale, at fair value | 24,225 | 18,476 |  |
Fair Value, Measurements, Recurring | Level 1 | Mutual Funds |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |
Equity and other securities, at fair value | 4,872 | 4,880 |  |
Fair Value, Measurements, Recurring | Level 2 |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |
Derivative assets | 29,113 | 13,375 |  |
Derivative liabilities | 7,475 | 9,665 |  |
Fair Value, Measurements, Recurring | Level 2 | U.S. Government Agencies |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |
Securities available-for-sale, at fair value | 140,240 | 139,390 |  |
Fair Value, Measurements, Recurring | Level 2 | Obligations of States, Municipalities, and Political Subdivisions |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |
Securities available-for-sale, at fair value | 82,128 | 89,636 |  |
Fair Value, Measurements, Recurring | Level 2 | Mortgage-Backed Securities; Residential | Agency |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |
Securities available-for-sale, at fair value | 700,857 | 743,656 |  |
Fair Value, Measurements, Recurring | Level 2 | Mortgage-Backed Securities; Residential | Non-Agency |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |
Securities available-for-sale, at fair value | 130,424 | 145,236 |  |
Fair Value, Measurements, Recurring | Level 2 | Mortgage-Backed Securities; Commercial | Agency |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |
Securities available-for-sale, at fair value | 189,693 | 213,551 |  |
Fair Value, Measurements, Recurring | Level 2 | Corporate Securities |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |
Securities available-for-sale, at fair value | 65,142 | 67,346 |  |
Fair Value, Measurements, Recurring | Level 2 | Asset-Backed Securities |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |
Securities available-for-sale, at fair value | 36,659 | 37,251 |  |
Fair Value, Measurements, Recurring | Level 2 | Equity Securities |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |
Equity and other securities, at fair value | 5,130 | 5,012 |  |
Fair Value, Measurements, Recurring | Level 3 |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |
Servicing assets, at fair value | 24,497 | 23,744 |  |
Fair Value, Measurements, Recurring | Level 3 | Equity Securities |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |
Equity and other securities, at fair value | $ 675 | $ 686 |  |

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