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Bank segment - Allowance for credit losses (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2019
Allowance for credit losses: |  |  |  |  |
Beginning balance | $ 78,252 | $ 81,307 | $ 101,201 | $ 53,355 |
Charge-offs | (1,915) | (5,608) | (7,856) | (19,619) |
Recoveries | 1,582 | 1,290 | 4,566 | 3,078 |
Provision for credit losses | (1,975) | 14,470 | (21,967) | 35,204 |
Ending balance | 75,944 | 91,459 | 75,944 | 91,459 | $ 53,355
Accounting standards update, extensible enumeration |  |  |  |  | Accounting Standards Update 2016-13 [Member]
Real estate | Residential 1-4 family |  |  |  |  |
Allowance for credit losses: |  |  |  |  |
Beginning balance | 5,518 | 3,911 | 4,600 | 2,380 |
Charge-offs | (47) | 0 | (67) | (7) |
Recoveries | 5 | 12 | 59 | 67 |
Provision for credit losses | 522 | (286) | 1,406 | (953) |
Ending balance | 5,998 | 3,637 | 5,998 | 3,637 | $ 2,380
Real estate | Commercial real estate |  |  |  |  |
Allowance for credit losses: |  |  |  |  |
Beginning balance | 28,708 | 21,100 | 35,607 | 15,053 |
Charge-offs | 0 | 0 | 0 | 0 |
Recoveries | 0 | 0 | 0 | 0 |
Provision for credit losses | (2,750) | 11,049 | (9,649) | 16,888 |
Ending balance | 25,958 | 32,149 | 25,958 | 32,149 | 15,053
Real estate | Home equity line of credit |  |  |  |  |
Allowance for credit losses: |  |  |  |  |
Beginning balance | 5,335 | 6,214 | 6,813 | 6,922 |
Charge-offs | (5) | 0 | (45) | 0 |
Recoveries | 7 | 50 | 83 | 56 |
Provision for credit losses | 441 | (390) | (1,073) | (563) |
Ending balance | 5,778 | 5,874 | 5,778 | 5,874 | 6,922
Real estate | Residential land |  |  |  |  |
Allowance for credit losses: |  |  |  |  |
Beginning balance | 618 | 356 | 609 | 449 |
Charge-offs | 0 | 0 | 0 | (351) |
Recoveries | 35 | 12 | 56 | 26 |
Provision for credit losses | (19) | 178 | (31) | 486 |
Ending balance | 634 | 546 | 634 | 546 | 449
Real estate | Commercial construction |  |  |  |  |
Allowance for credit losses: |  |  |  |  |
Beginning balance | 1,629 | 4,757 | 4,149 | 2,097 |
Charge-offs | 0 | 0 | 0 | 0 |
Recoveries | 0 | 0 | 0 | 0 |
Provision for credit losses | 104 | 1,282 | (2,416) | 3,653 |
Ending balance | 1,733 | 6,039 | 1,733 | 6,039 | 2,097
Real estate | Residential construction |  |  |  |  |
Allowance for credit losses: |  |  |  |  |
Beginning balance | 16 | 14 | 11 | 3 |
Charge-offs | 0 | 0 | 0 | 0 |
Recoveries | 0 | 0 | 0 | 0 |
Provision for credit losses | (3) | (3) | 2 | (6) |
Ending balance | 13 | 11 | 13 | 11 | 3
Commercial |  |  |  |  |
Allowance for credit losses: |  |  |  |  |
Beginning balance | 20,058 | 13,868 | 25,462 | 10,245 |
Charge-offs | (266) | (1,727) | (1,356) | (2,795) |
Recoveries | 417 | 211 | 1,056 | 503 |
Provision for credit losses | (758) | 5,840 | (5,711) | 9,317 |
Ending balance | 19,451 | 18,192 | 19,451 | 18,192 | 10,245
Consumer |  |  |  |  |
Allowance for credit losses: |  |  |  |  |
Beginning balance | 16,370 | 31,087 | 23,950 | 16,206 |
Charge-offs | (1,597) | (3,881) | (6,388) | (16,466) |
Recoveries | 1,118 | 1,005 | 3,312 | 2,426 |
Provision for credit losses | 488 | (3,200) | (4,495) | 6,382 |
Ending balance | $ 16,379 | $ 25,011 | $ 16,379 | 25,011 | 16,206
Impact of adoption of ASU No. 2016-13 |  |  |  |  |
Allowance for credit losses: |  |  |  |  |
Beginning balance |  |  |  | 19,441 |
Ending balance |  |  |  |  | 19,441
Impact of adoption of ASU No. 2016-13 | Real estate | Residential 1-4 family |  |  |  |  |
Allowance for credit losses: |  |  |  |  |
Beginning balance |  |  |  | 2,150 |
Ending balance |  |  |  |  | 2,150
Impact of adoption of ASU No. 2016-13 | Real estate | Commercial real estate |  |  |  |  |
Allowance for credit losses: |  |  |  |  |
Beginning balance |  |  |  | 208 |
Ending balance |  |  |  |  | 208
Impact of adoption of ASU No. 2016-13 | Real estate | Home equity line of credit |  |  |  |  |
Allowance for credit losses: |  |  |  |  |
Beginning balance |  |  |  | (541) |
Ending balance |  |  |  |  | (541)
Impact of adoption of ASU No. 2016-13 | Real estate | Residential land |  |  |  |  |
Allowance for credit losses: |  |  |  |  |
Beginning balance |  |  |  | (64) |
Ending balance |  |  |  |  | (64)
Impact of adoption of ASU No. 2016-13 | Real estate | Commercial construction |  |  |  |  |
Allowance for credit losses: |  |  |  |  |
Beginning balance |  |  |  | 289 |
Ending balance |  |  |  |  | 289
Impact of adoption of ASU No. 2016-13 | Real estate | Residential construction |  |  |  |  |
Allowance for credit losses: |  |  |  |  |
Beginning balance |  |  |  | 14 |
Ending balance |  |  |  |  | 14
Impact of adoption of ASU No. 2016-13 | Commercial |  |  |  |  |
Allowance for credit losses: |  |  |  |  |
Beginning balance |  |  |  | 922 |
Ending balance |  |  |  |  | 922
Impact of adoption of ASU No. 2016-13 | Consumer |  |  |  |  |
Allowance for credit losses: |  |  |  |  |
Beginning balance |  |  |  | $ 16,463 |
Ending balance |  |  |  |  | $ 16,463

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- Definition Amount of writeoff of financing receivable, charged against allowance for credit loss. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=124267575&loc=SL82922352-210448 + Details
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- Definition Amount of credit loss expense (reversal of expense) for financing receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(11)) -URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 + Details
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