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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, 2020 | Dec. 31, 2019
--- | --- | ---
Balance sheet assets |  |
Securities available for sale | $ 998,104 | $ 1,135,317
Securities held-to-maturity, net | 346,436 | 181,166
Carrying Amount |  |
Balance sheet assets |  |
Securities held-to-maturity, net | 345,791 | 181,166
Other investments | 43,106 | 38,044
Loans held for sale | 16,029 | 5,570
Loans, net | 6,029,781 | 5,271,049
State tax credits held for sale | 38,820 | 36,802
Balance sheet liabilities |  |
Certificates of deposit | 659,166 | 826,447
Subordinated debentures and notes | 203,384 | 141,258
FHLB advances | 250,000 | 222,406
Other borrowings and notes payable | 227,961 | 265,172
Estimated fair value |  |
Balance sheet assets |  |
Securities held-to-maturity, net | 356,139 | 181,939
Other investments | 43,106 | 38,044
Loans held for sale | 16,029 | 5,570
Loans, net | 5,876,000 | 5,205,651
State tax credits held for sale | 44,164 | 39,046
Balance sheet liabilities |  |
Certificates of deposit | 665,374 | 825,203
Subordinated debentures and notes | 192,852 | 130,985
FHLB advances | 251,978 | 221,402
Other borrowings and notes payable | $ 227,961 | $ 265,172

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