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Fair Value Measurements - Summary of Carrying Amount and Fair Values of Financial Instruments Reported on the Balance Sheets (Details) - USD ($) $ in Thousands | Jun. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Balance sheet assets |  |
Securities available for sale | $ 1,084,223 | $ 912,429
Securities held-to-maturity, net | 451,114 | 488,059
Carrying Amount |  |
Balance sheet assets |  |
Securities held-to-maturity, net | 450,665 | 487,610
Other investments | 50,959 | 48,764
Loans held for sale | 5,763 | 13,564
Loans, net | 7,098,082 | 7,088,264
State tax credits held for sale | 34,710 | 36,853
Balance sheet liabilities |  |
Certificates of deposit | 514,334 | 550,095
Subordinated debentures and notes | 203,940 | 203,637
FHLB advances | 50,000 | 50,000
Other borrowings and notes payable | 234,509 | 301,081
Estimated fair value |  |
Balance sheet assets |  |
Securities held-to-maturity, net | 470,099 | 501,523
Other investments | 50,959 | 48,764
Loans held for sale | 5,763 | 13,564
Loans, net | 7,093,710 | 7,067,562
State tax credits held for sale | 38,629 | 39,925
Balance sheet liabilities |  |
Certificates of deposit | 515,877 | 553,946
Subordinated debentures and notes | 193,136 | 192,889
FHLB advances | 51,591 | 51,871
Other borrowings and notes payable | $ 234,509 | $ 301,081

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