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Allowance for Credit Losses (ACL) - Disaggregated analysis of the changes in allowance for credit losses (Details) - USD ($) |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 01, 2022 | Mar. 31, 2023 | Mar. 31, 2022 | Dec. 31, 2022
Allowance for credit losses |  |  |  |
Balance at beginning of period |  | $ 356,444,000 | $ 301,807,000 | $ 301,807,000
Charge-offs |  | (4,627,000) | (5,490,000) | (23,446,000)
Recoveries |  | 3,589,000 | 3,167,000 |
Net (charge-offs) recoveries |  | (1,038,000) | (2,323,000) |
Provision (recovery) |  | 15,239,000 | (22,003,000) |
Balance at end of period |  | 370,645,000 | 300,396,000 | 356,444,000
Quantitative allowance |  |  |  |
Collectively evaluated |  | 341,504,000 | 288,316,000 |
Individually evaluated |  | 16,782,000 | 8,431,000 |
Total quantitative allowance |  | 358,286,000 | 296,747,000 |
Qualitative allowance |  | 12,359,000 | 3,649,000 |
Unfunded Commitment |  |  |  |
Allowance for credit losses |  |  |  |
Provision (recovery) |  | 17,900,000 | (142,000) |
Initial PCD Allowance |  |  |  |
Allowance for credit losses |  |  |  |
Balance at end of period |  |  | 9,218,000 |
Initial Non PCD Allowance |  |  |  |
Allowance for credit losses |  |  |  |
Balance at end of period |  |  | 13,697,000 |
Residential Mortgage Sr. |  |  |  |
Allowance for credit losses |  |  |  |
Balance at beginning of period |  | 72,188,000 | 47,036,000 | 47,036,000
Charge-offs |  | (2,000) | (58,000) |
Recoveries |  | 294,000 | 394,000 |
Net (charge-offs) recoveries |  | 292,000 | 336,000 |
Provision (recovery) |  | 4,871,000 | (1,806,000) |
Balance at end of period |  | 77,351,000 | 46,002,000 | 72,188,000
Quantitative allowance |  |  |  |
Collectively evaluated |  | 77,982,000 | 45,805,000 |
Individually evaluated |  | 197,000 | 168,000 |
Total quantitative allowance |  | 78,179,000 | 45,973,000 |
Qualitative allowance |  | (828,000) | 29,000 |
Residential Mortgage Sr. | Initial PCD Allowance |  |  |  |
Allowance for credit losses |  |  |  |
Balance at end of period |  |  | 84,000 |
Residential Mortgage Sr. | Initial Non PCD Allowance |  |  |  |
Allowance for credit losses |  |  |  |
Balance at end of period |  |  | 352,000 |
Residential Mortgage Jr. |  |  |  |
Allowance for credit losses |  |  |  |
Balance at beginning of period |  | 405,000 | 611,000 | 611,000
Charge-offs |  |  | (19,000) |
Recoveries |  | 5,000 | 55,000 |
Net (charge-offs) recoveries |  | 5,000 | 36,000 |
Provision (recovery) |  | (61,000) | (87,000) |
Balance at end of period |  | 349,000 | 586,000 | 405,000
Quantitative allowance |  |  |  |
Collectively evaluated |  | 350,000 | 586,000 |
Total quantitative allowance |  | 350,000 | 586,000 |
Qualitative allowance |  | (1,000) |  |
Residential Mortgage Jr. | Initial Non PCD Allowance |  |  |  |
Allowance for credit losses |  |  |  |
Balance at end of period |  |  | 26,000 |
HELOC |  |  |  |
Allowance for credit losses |  |  |  |
Balance at beginning of period |  | 14,886,000 | 13,325,000 | 13,325,000
Charge-offs |  | (39,000) | (218,000) |
Recoveries |  | 245,000 | 257,000 |
Net (charge-offs) recoveries |  | 206,000 | 39,000 |
Provision (recovery) |  | (774,000) | 175,000 |
Balance at end of period |  | 14,318,000 | 13,671,000 | 14,886,000
Quantitative allowance |  |  |  |
Collectively evaluated |  | 12,229,000 | 12,301,000 |
Individually evaluated |  | 2,285,000 | 1,357,000 |
Total quantitative allowance |  | 14,514,000 | 13,658,000 |
Qualitative allowance |  | (196,000) | 13,000 |
HELOC | Initial Non PCD Allowance |  |  |  |
Allowance for credit losses |  |  |  |
Balance at end of period |  |  | 132,000 |
Residential Construction |  |  |  |
Allowance for credit losses |  |  |  |
Balance at beginning of period |  | 8,974,000 | 4,997,000 | 4,997,000
Recoveries |  | 72,000 | 3,000 |
Net (charge-offs) recoveries |  | 72,000 | 3,000 |
Provision (recovery) |  | 130,000 | 614,000 |
Balance at end of period |  | 9,176,000 | 5,616,000 | 8,974,000
Quantitative allowance |  |  |  |
Collectively evaluated |  | 8,994,000 | 5,616,000 |
Total quantitative allowance |  | 8,994,000 | 5,616,000 |
Qualitative allowance |  | 182,000 |  |
Residential Construction | Initial Non PCD Allowance |  |  |  |
Allowance for credit losses |  |  |  |
Balance at end of period |  |  | 2,000 |
Other C&D |  |  |  |
Allowance for credit losses |  |  |  |
Balance at beginning of period |  | 45,410,000 | 37,593,000 | 37,593,000
Charge-offs |  |  | (4,000) |
Recoveries |  | 258,000 | 234,000 |
Net (charge-offs) recoveries |  | 258,000 | 230,000 |
Provision (recovery) |  | 9,401,000 | (14,438,000) |
Balance at end of period |  | 55,069,000 | 25,358,000 | 45,410,000
Quantitative allowance |  |  |  |
Collectively evaluated |  | 49,865,000 | 24,770,000 |
Individually evaluated |  | 155,000 | 588,000 |
Total quantitative allowance |  | 50,020,000 | 25,358,000 |
Qualitative allowance |  | 5,049,000 |  |
Other C&D | Initial PCD Allowance |  |  |  |
Allowance for credit losses |  |  |  |
Balance at end of period |  |  | 86,000 |
Other C&D | Initial Non PCD Allowance |  |  |  |
Allowance for credit losses |  |  |  |
Balance at end of period |  |  | 1,887,000 |
Consumer |  |  |  |
Allowance for credit losses |  |  |  |
Balance at beginning of period |  | 22,767,000 | 23,149,000 | 23,149,000
Charge-offs |  | (2,729,000) | (2,661,000) |
Recoveries |  | 584,000 | 532,000 |
Net (charge-offs) recoveries |  | (2,145,000) | (2,129,000) |
Provision (recovery) |  | 2,697,000 | 828,000 |
Balance at end of period |  | 23,319,000 | 21,899,000 | 22,767,000
Quantitative allowance |  |  |  |
Collectively evaluated |  | 23,319,000 | 21,899,000 |
Total quantitative allowance |  | 23,319,000 | 21,899,000 |
Consumer | Initial Non PCD Allowance |  |  |  |
Allowance for credit losses |  |  |  |
Balance at end of period |  |  | 51,000 |
Multifamily |  |  |  |
Allowance for credit losses |  |  |  |
Balance at beginning of period |  | 3,684,000 | 4,921,000 | 4,921,000
Provision (recovery) |  | 1,823,000 | (1,444,000) |
Balance at end of period |  | 5,507,000 | 3,903,000 | 3,684,000
Quantitative allowance |  |  |  |
Collectively evaluated |  | 5,369,000 | 3,903,000 |
Total quantitative allowance |  | 5,369,000 | 3,903,000 |
Qualitative allowance |  | 138,000 |  |
Multifamily | Initial Non PCD Allowance |  |  |  |
Allowance for credit losses |  |  |  |
Balance at end of period |  |  | 426,000 |
Municipal |  |  |  |
Allowance for credit losses |  |  |  |
Balance at beginning of period |  | 849,000 | 565,000 | 565,000
Provision (recovery) |  | 30,000 | 42,000 |
Balance at end of period |  | 879,000 | 607,000 | 849,000
Quantitative allowance |  |  |  |
Collectively evaluated |  | 731,000 | 607,000 |
Total quantitative allowance |  | 731,000 | 607,000 |
Qualitative allowance |  | 148,000 |  |
CRE Owner Occupied |  |  |  |
Allowance for credit losses |  |  |  |
Balance at beginning of period |  | 58,083,000 | 61,794,000 | 61,794,000
Charge-offs |  |  | (371,000) |
Recoveries |  | 293,000 | 314,000 |
Net (charge-offs) recoveries |  | 293,000 | (57,000) |
Provision (recovery) |  | (835,000) | (16,641,000) |
Balance at end of period |  | 57,541,000 | 49,094,000 | 58,083,000
Quantitative allowance |  |  |  |
Collectively evaluated |  | 49,297,000 | 45,302,000 |
Individually evaluated |  | 6,812,000 | 2,960,000 |
Total quantitative allowance |  | 56,109,000 | 48,262,000 |
Qualitative allowance |  | 1,432,000 | 832,000 |
CRE Owner Occupied | Initial PCD Allowance |  |  |  |
Allowance for credit losses |  |  |  |
Balance at end of period |  |  | 1,479,000 |
CRE Owner Occupied | Initial Non PCD Allowance |  |  |  |
Allowance for credit losses |  |  |  |
Balance at end of period |  |  | 2,519,000 |
Non Owner Occupied CRE |  |  |  |
Allowance for credit losses |  |  |  |
Balance at beginning of period |  | 78,485,000 | 79,649,000 | 79,649,000
Charge-offs |  | (51,000) |  |
Recoveries |  | 106,000 | 69,000 |
Net (charge-offs) recoveries |  | 55,000 | 69,000 |
Provision (recovery) |  | 3,933,000 | 13,945,000 |
Balance at end of period |  | 82,473,000 | 96,360,000 | 78,485,000
Quantitative allowance |  |  |  |
Collectively evaluated |  | 78,013,000 | 95,051,000 |
Individually evaluated |  | 2,721,000 |  |
Total quantitative allowance |  | 80,734,000 | 95,051,000 |
Qualitative allowance |  | 1,739,000 | 1,309,000 |
Non Owner Occupied CRE | Initial Non PCD Allowance |  |  |  |
Allowance for credit losses |  |  |  |
Balance at end of period |  |  | 2,697,000 |
C & I |  |  |  |
Allowance for credit losses |  |  |  |
Balance at beginning of period |  | 50,713,000 | 28,167,000 | 28,167,000
Charge-offs |  | (1,806,000) | (2,159,000) |
Recoveries |  | 1,732,000 | 1,309,000 |
Net (charge-offs) recoveries |  | (74,000) | (850,000) |
Provision (recovery) |  | (5,976,000) | (3,191,000) |
Balance at end of period |  | 44,663,000 | 37,300,000 | $ 50,713,000
Quantitative allowance |  |  |  |
Collectively evaluated |  | 35,355,000 | 32,476,000 |
Individually evaluated |  | 4,612,000 | 3,358,000 |
Total quantitative allowance |  | 39,967,000 | 35,834,000 |
Qualitative allowance |  | $ 4,696,000 | 1,466,000 |
C & I | Initial PCD Allowance |  |  |  |
Allowance for credit losses |  |  |  |
Balance at end of period |  |  | 7,569,000 |
C & I | Initial Non PCD Allowance |  |  |  |
Allowance for credit losses |  |  |  |
Balance at end of period |  |  | 5,605,000 |
Atlantic Capital |  |  |  |
Allowance for credit losses |  |  |  |
Charge-offs | $ (22,100,000) |  |  |
Atlantic Capital | Unfunded Commitment |  |  |  |
Allowance for credit losses |  |  |  |
Provision (recovery) |  |  | $ 3,400,000 |

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- Definition Reflects the amount of loans and leases that have been removed, or charged off, from both loan receivables and the reserve for credit losses, typically because they are considered to be not salvageable or have been purchased by unconsolidated collection entities. This amount is net of reduction in bad debt expense attributable to collections of loans and lease receivables which had previously been fully or partially charged off as bad debts. + References No definition available. + Details
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