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Loans and Allowance for Credit Losses (Allowance for Credit Losses by Portfolio Class) (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Dec. 31, 2023
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Allowance for loan losses: Beginning balance | $ 307,907 | $ 307,789 |
Allowance for loan losses: Net provision for loan losses | 12,968 | 6,020 |
Allowance for loan losses: Ending balance | 313,726 | 309,385 |
Reserve for unfunded lending commitments: Beginning balance | 28,894 | 33,309 |
Reserve for unfunded lending commitments: Provision for losses | (1,831) | (1,295) |
Reserve for unfunded lending commitments: Ending balance | 27,063 | 32,014 |
Total allowance for credit losses | 340,789 | 341,399 |
Allowance for loan losses: Individually evaluated |  | 0 |
Allowance for loan losses: Collectively evaluated | 313,726 | 309,385 |
Reserve for unfunded lending commitments: Individually evaluated |  | 0 |
Reserve for unfunded lending commitments: Collectively evaluated | 27,063 | 32,014 |
Loans: Individually evaluated for impairment | 37,176 | 13,212 |
Loans: Collectively evaluated for impairment | 23,933,762 | 23,391,311 |
Total loans | 23,970,938 | 23,404,523 | $ 23,921,917
Non-Purchased Credit Impaired Loans [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Allowance for loan losses: Charge-offs | (23,366) | (7,972) |
Allowance for loan losses: Recoveries | 14,386 | 2,253 |
Allowance for loan losses: Net provision for loan losses | 14,799 | 7,315 |
Total Commercial [Member] | Commercial Real Estate - Income Producing [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Allowance for loan losses: Beginning balance | 74,539 | 71,961 |
Allowance for loan losses: Ending balance | 77,877 | 76,192 |
Reserve for unfunded lending commitments: Beginning balance | 1,344 | 1,395 |
Reserve for unfunded lending commitments: Provision for losses | (352) | 493 |
Reserve for unfunded lending commitments: Ending balance | 992 | 1,888 |
Total allowance for credit losses | 78,869 | 78,080 |
Allowance for loan losses: Individually evaluated |  | 0 |
Allowance for loan losses: Collectively evaluated | 77,877 | 76,192 |
Reserve for unfunded lending commitments: Individually evaluated |  | 0 |
Reserve for unfunded lending commitments: Collectively evaluated | 992 | 1,888 |
Loans: Individually evaluated for impairment | 23,436 | 1,120 |
Loans: Collectively evaluated for impairment | 4,019,361 | 3,757,335 |
Total loans | 4,042,797 | 3,758,455 | 3,986,943
Total Commercial [Member] | Construction and Land Development [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Allowance for loan losses: Beginning balance | 27,039 | 30,498 |
Allowance for loan losses: Ending balance | 25,838 | 30,902 |
Reserve for unfunded lending commitments: Beginning balance | 20,019 | 25,110 |
Reserve for unfunded lending commitments: Provision for losses | (1,615) | (1,487) |
Reserve for unfunded lending commitments: Ending balance | 18,404 | 23,623 |
Total allowance for credit losses | 44,242 | 54,525 |
Allowance for loan losses: Individually evaluated |  | 0 |
Allowance for loan losses: Collectively evaluated | 25,838 | 30,902 |
Reserve for unfunded lending commitments: Individually evaluated |  | 0 |
Reserve for unfunded lending commitments: Collectively evaluated | 18,404 | 23,623 |
Loans: Individually evaluated for impairment | 928 | 0 |
Loans: Collectively evaluated for impairment | 1,540,845 | 1,726,916 |
Total loans | 1,541,773 | 1,726,916 | 1,551,091
Total Commercial [Member] | Non-Purchased Credit Impaired Loans [Member] | Commercial Real Estate - Income Producing [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Allowance for loan losses: Charge-offs | (8,819) | 0 |
Allowance for loan losses: Recoveries | 3 | 0 |
Allowance for loan losses: Net provision for loan losses | 12,154 | 4,231 |
Total Commercial [Member] | Non-Purchased Credit Impaired Loans [Member] | Construction and Land Development [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Allowance for loan losses: Charge-offs | (75) | (61) |
Allowance for loan losses: Recoveries | 61 | 6 |
Allowance for loan losses: Net provision for loan losses | (1,187) | 459 |
Total Commercial [Member] | Total Commercial And Industrial [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Allowance for loan losses: Beginning balance | 141,934 | 144,745 |
Allowance for loan losses: Ending balance | 143,636 | 140,312 |
Reserve for unfunded lending commitments: Beginning balance | 5,834 | 5,286 |
Reserve for unfunded lending commitments: Provision for losses | 152 | (169) |
Reserve for unfunded lending commitments: Ending balance | 5,986 | 5,117 |
Total allowance for credit losses | 149,622 | 145,429 |
Allowance for loan losses: Individually evaluated |  | 0 |
Allowance for loan losses: Collectively evaluated | 143,636 | 140,312 |
Reserve for unfunded lending commitments: Individually evaluated |  | 0 |
Reserve for unfunded lending commitments: Collectively evaluated | 5,986 | 5,117 |
Loans: Individually evaluated for impairment | 11,994 | 10,957 |
Loans: Collectively evaluated for impairment | 12,994,531 | 13,053,273 |
Total loans | 13,006,525 | 13,064,230 | 13,051,047
Total Commercial [Member] | Total Commercial And Industrial [Member] | Commercial Non-Real Estate [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Allowance for loan losses: Beginning balance | 101,737 | 96,461 |
Allowance for loan losses: Ending balance | 104,358 | 92,646 |
Reserve for unfunded lending commitments: Beginning balance | 5,507 | 4,984 |
Reserve for unfunded lending commitments: Provision for losses | 192 | (191) |
Reserve for unfunded lending commitments: Ending balance | 5,699 | 4,793 |
Total allowance for credit losses | 110,057 | 97,439 |
Allowance for loan losses: Individually evaluated |  | 0 |
Allowance for loan losses: Collectively evaluated | 104,358 | 92,646 |
Reserve for unfunded lending commitments: Individually evaluated |  | 0 |
Reserve for unfunded lending commitments: Collectively evaluated | 5,699 | 4,793 |
Loans: Individually evaluated for impairment | 11,255 | 10,273 |
Loans: Collectively evaluated for impairment | 9,915,078 | 10,003,209 |
Total loans | 9,926,333 | 10,013,482 | 9,957,284
Total Commercial [Member] | Total Commercial And Industrial [Member] | Commercial Real Estate - Owner Occupied [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Allowance for loan losses: Beginning balance | 40,197 | 48,284 |
Allowance for loan losses: Ending balance | 39,278 | 47,666 |
Reserve for unfunded lending commitments: Beginning balance | 327 | 302 |
Reserve for unfunded lending commitments: Provision for losses | (40) | 22 |
Reserve for unfunded lending commitments: Ending balance | 287 | 324 |
Total allowance for credit losses | 39,565 | 47,990 |
Allowance for loan losses: Individually evaluated |  | 0 |
Allowance for loan losses: Collectively evaluated | 39,278 | 47,666 |
Reserve for unfunded lending commitments: Individually evaluated |  | 0 |
Reserve for unfunded lending commitments: Collectively evaluated | 287 | 324 |
Loans: Individually evaluated for impairment | 739 | 684 |
Loans: Collectively evaluated for impairment | 3,079,453 | 3,050,064 |
Total loans | 3,080,192 | 3,050,748 | 3,093,763
Total Commercial [Member] | Total Commercial And Industrial [Member] | Non-Purchased Credit Impaired Loans [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Allowance for loan losses: Charge-offs | (9,630) | (4,528) |
Allowance for loan losses: Recoveries | 13,206 | 1,228 |
Allowance for loan losses: Net provision for loan losses | (1,874) | (1,133) |
Total Commercial [Member] | Total Commercial And Industrial [Member] | Non-Purchased Credit Impaired Loans [Member] | Commercial Non-Real Estate [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Allowance for loan losses: Charge-offs | (9,630) | (4,528) |
Allowance for loan losses: Recoveries | 13,104 | 1,033 |
Allowance for loan losses: Net provision for loan losses | (853) | (320) |
Total Commercial [Member] | Total Commercial And Industrial [Member] | Non-Purchased Credit Impaired Loans [Member] | Commercial Real Estate - Owner Occupied [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Allowance for loan losses: Charge-offs |  | 0 |
Allowance for loan losses: Recoveries | 102 | 195 |
Allowance for loan losses: Net provision for loan losses | (1,021) | (813) |
Residential Mortgages [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Allowance for loan losses: Beginning balance | 38,983 | 32,464 |
Allowance for loan losses: Ending balance | 41,158 | 34,541 |
Reserve for unfunded lending commitments: Beginning balance | 30 | 31 |
Reserve for unfunded lending commitments: Provision for losses | (8) | (14) |
Reserve for unfunded lending commitments: Ending balance | 22 | 17 |
Total allowance for credit losses | 41,180 | 34,558 |
Allowance for loan losses: Individually evaluated |  | 0 |
Allowance for loan losses: Collectively evaluated | 41,158 | 34,541 |
Reserve for unfunded lending commitments: Individually evaluated |  | 0 |
Reserve for unfunded lending commitments: Collectively evaluated | 22 | 17 |
Loans: Individually evaluated for impairment |  | 1,135 |
Loans: Collectively evaluated for impairment | 3,983,321 | 3,328,658 |
Total loans | 3,983,321 | 3,329,793 | 3,886,072
Residential Mortgages [Member] | Non-Purchased Credit Impaired Loans [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Allowance for loan losses: Charge-offs | (56) | (20) |
Allowance for loan losses: Recoveries | 202 | 181 |
Allowance for loan losses: Net provision for loan losses | 2,029 | 1,916 |
Consumer [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Allowance for loan losses: Beginning balance | 25,412 | 28,121 |
Allowance for loan losses: Ending balance | 25,217 | 27,438 |
Reserve for unfunded lending commitments: Beginning balance | 1,667 | 1,487 |
Reserve for unfunded lending commitments: Provision for losses | (8) | (118) |
Reserve for unfunded lending commitments: Ending balance | 1,659 | 1,369 |
Total allowance for credit losses | 26,876 | 28,807 |
Allowance for loan losses: Individually evaluated |  | 0 |
Allowance for loan losses: Collectively evaluated | 25,217 | 27,438 |
Reserve for unfunded lending commitments: Individually evaluated |  | 0 |
Reserve for unfunded lending commitments: Collectively evaluated | 1,659 | 1,369 |
Loans: Individually evaluated for impairment | 818 | 0 |
Loans: Collectively evaluated for impairment | 1,395,704 | 1,525,129 |
Total loans | 1,396,522 | 1,525,129 | $ 1,446,764
Consumer [Member] | Non-Purchased Credit Impaired Loans [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Allowance for loan losses: Charge-offs | (4,786) | (3,363) |
Allowance for loan losses: Recoveries | 914 | 838 |
Allowance for loan losses: Net provision for loan losses | $ 3,677 | $ 1,842 |

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