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Fair Value Measurements - Recurring (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2022 | Mar. 31, 2021 | Dec. 31, 2021
Assets: |  |  |
Securities available-for-sale | $ 1,816,450 |  | $ 1,692,488
Mortgage servicing rights | 10,376 |  | 7,097
U.S. Treasury |  |  |
Assets: |  |  |
Securities available-for-sale | 220,563 |  | 202,339
U.S. government agencies |  |  |
Assets: |  |  |
Securities available-for-sale | 59,036 |  | 61,888
States and political subdivisions |  |  |
Assets and liabilities measured at fair value on a recurring basis |  |  |
Purchases | 1,076 | $ 58 |
Assets: |  |  |
Securities available-for-sale | 236,408 |  | 256,465
Corporate bonds |  |  |
Assets: |  |  |
Securities available-for-sale | 9,683 |  | 9,887
Collateralized mortgage obligations |  |  |
Assets: |  |  |
Securities available-for-sale | 696,513 |  | 672,967
Asset-backed Securities |  |  |
Assets: |  |  |
Securities available-for-sale | 274,941 |  | 236,877
Collateralized loan obligations. |  |  |
Assets: |  |  |
Securities available-for-sale | 166,158 |  | 79,763
Fair Value, Inputs, Level 1 [Member] |  |  |
Assets: |  |  |
Securities available-for-sale | 220,563 |  | 202,339
Fair Value, Inputs, Level 2 [Member] |  |  |
Assets: |  |  |
Securities available-for-sale | 1,582,054 |  | 1,476,057
Loans held-for-sale | 8,075 |  | 4,737
Other assets | 952 |  | 3,494
Liabilities: |  |  |
Other liabilities | 3,657 |  | 6,788
Fair Value, Inputs, Level 3 [Member] |  |  |
Assets: |  |  |
Securities available-for-sale | 13,833 |  | 14,092
Mortgage servicing rights | 10,376 |  | 7,097
Fair Value, Inputs, Level 3 [Member] | States and political subdivisions |  |  |
Assets: |  |  |
Securities available-for-sale | 13,800 | $ 4,600 |
Fair Value, Measurements, Recurring [Member] |  |  |
Assets: |  |  |
Loans held-for-sale | 8,075 |  | 4,737
Mortgage servicing rights | 10,376 |  | 7,097
Total financial assets | 1,836,783 |  | 1,708,324
Liabilities: |  |  |
Total | 3,663 |  | 6,809
Fair Value, Measurements, Recurring [Member] | Interest Rate Swap [Member] |  |  |
Assets: |  |  |
Other assets | 952 |  | 3,494
Liabilities: |  |  |
Other liabilities | 3,663 |  | 6,809
Fair Value, Measurements, Recurring [Member] | Forward Contracts [Member] |  |  |
Assets: |  |  |
Other assets | 930 |  | 508
Fair Value, Measurements, Recurring [Member] | U.S. Treasury |  |  |
Assets: |  |  |
Securities available-for-sale | 220,563 |  | 202,339
Fair Value, Measurements, Recurring [Member] | U.S. government agencies |  |  |
Assets: |  |  |
Securities available-for-sale | 59,036 |  | 61,888
Fair Value, Measurements, Recurring [Member] | Mortgage Backed Securities, Issued by US Government Agencies |  |  |
Assets: |  |  |
Securities available-for-sale | 153,148 |  | 172,302
Fair Value, Measurements, Recurring [Member] | States and political subdivisions |  |  |
Assets: |  |  |
Securities available-for-sale | 236,408 |  | 256,465
Fair Value, Measurements, Recurring [Member] | Corporate bonds |  |  |
Assets: |  |  |
Securities available-for-sale | 9,683 |  | 9,887
Fair Value, Measurements, Recurring [Member] | Collateralized mortgage obligations |  |  |
Assets: |  |  |
Securities available-for-sale | 696,513 |  | 672,967
Fair Value, Measurements, Recurring [Member] | Asset-backed Securities |  |  |
Assets: |  |  |
Securities available-for-sale | 274,941 |  | 236,877
Fair Value, Measurements, Recurring [Member] | Collateralized loan obligations. |  |  |
Assets: |  |  |
Securities available-for-sale | 166,158 |  | 79,763
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Assets: |  |  |
Total financial assets | 220,563 |  | 202,339
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | U.S. Treasury |  |  |
Assets: |  |  |
Securities available-for-sale | 220,563 |  | 202,339
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Assets: |  |  |
Loans held-for-sale | 8,075 |  | 4,737
Total financial assets | 1,592,011 |  | 1,484,796
Liabilities: |  |  |
Total | 3,663 |  | 6,809
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Interest Rate Swap [Member] |  |  |
Assets: |  |  |
Other assets | 952 |  | 3,494
Liabilities: |  |  |
Other liabilities | 3,663 |  | 6,809
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Forward Contracts [Member] |  |  |
Assets: |  |  |
Other assets | 930 |  | 508
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | U.S. government agencies |  |  |
Assets: |  |  |
Securities available-for-sale | 59,036 |  | 61,888
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Mortgage Backed Securities, Issued by US Government Agencies |  |  |
Assets: |  |  |
Securities available-for-sale | 153,148 |  | 172,302
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | States and political subdivisions |  |  |
Assets: |  |  |
Securities available-for-sale | 222,575 |  | 242,373
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Corporate bonds |  |  |
Assets: |  |  |
Securities available-for-sale | 9,683 |  | 9,887
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Collateralized mortgage obligations |  |  |
Assets: |  |  |
Securities available-for-sale | 696,513 |  | 672,967
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Asset-backed Securities |  |  |
Assets: |  |  |
Securities available-for-sale | 274,941 |  | 236,877
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Collateralized loan obligations. |  |  |
Assets: |  |  |
Securities available-for-sale | 166,158 |  | 79,763
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Assets: |  |  |
Mortgage servicing rights | 10,376 |  | 7,097
Total financial assets | 24,209 |  | 21,189
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | States and political subdivisions |  |  |
Assets: |  |  |
Securities available-for-sale | $ 13,833 |  | $ 14,092

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