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Portfolio Loans - Summary of Allowance for Loan Losses by Portfolio Class and Category (Details) - Non-Covered Loans - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Allowance for Loan Losses [Roll Forward]      
Balance, beginning of year $ 145,041 $ 136,671 $ 69,995
Provision (benefit) for loan losses (4,210) 12,993 63,379
Initial Allowance on Acquired PCD Loans   7,006 3,524
Charge-offs (9,393) (17,185) (6,739)
Recoveries 5,494 5,556 6,512
Balance, end of year 136,932 145,041 136,671
Commercial and industrial      
Allowance for Loan Losses [Roll Forward]      
Balance, beginning of year 63,825 58,812 33,949
Provision (benefit) for loan losses (6,121) 14,361 28,373
Initial Allowance on Acquired PCD Loans   1,077 23
Charge-offs (6,082) (12,113) (5,381)
Recoveries 2,213 1,688 1,848
Balance, end of year 53,835 63,825 58,812
Commercial - investor owned      
Allowance for Loan Losses [Roll Forward]      
Balance, beginning of year 35,877 32,062 16,656
Provision (benefit) for loan losses 46 568 11,037
Initial Allowance on Acquired PCD Loans   3,651 2,026
Charge-offs (478) (2,487) (498)
Recoveries 746 2,083 2,841
Balance, end of year 36,191 35,877 32,062
CRE - owner occupied      
Allowance for Loan Losses [Roll Forward]      
Balance, beginning of year 17,560 17,012 7,414
Provision (benefit) for loan losses 4,867 (550) 7,845
Initial Allowance on Acquired PCD Loans   1,504 1,427
Charge-offs (395) (602) (30)
Recoveries 720 196 356
Balance, end of year 22,752 17,560 17,012
Construction and land development      
Allowance for Loan Losses [Roll Forward]      
Balance, beginning of year 14,536 21,413 7,577
Provision (benefit) for loan losses (3,145) (7,365) 13,438
Initial Allowance on Acquired PCD Loans   37 45
Charge-offs 0 (3) (31)
Recoveries 53 454 384
Balance, end of year 11,444 14,536 21,413
Residential real estate      
Allowance for Loan Losses [Roll Forward]      
Balance, beginning of year 7,927 4,585 3,349
Provision (benefit) for loan losses 540 3,900 674
Initial Allowance on Acquired PCD Loans   0 3
Charge-offs (2,068) (1,521) (408)
Recoveries 1,529 963 967
Balance, end of year 7,928 7,927 4,585
Other      
Allowance for Loan Losses [Roll Forward]      
Balance, beginning of year 5,316 2,787 1,050
Provision (benefit) for loan losses (397) 2,079 2,012
Initial Allowance on Acquired PCD Loans   737 0
Charge-offs (370) (459) (391)
Recoveries 233 172 116
Balance, end of year $ 4,782 $ 5,316 $ 2,787