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Bank segment - Allowance for credit losses (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2019
Allowance for credit losses: |  |  |  |  |
Valuation allowance, balance at the beginning of the period | $ 81,307 | $ 58,425 | $ 53,355 | $ 52,119 |
Charge-offs | (5,608) | (10,231) | (19,619) | (22,046) |
Recoveries | 1,290 | 1,531 | 3,078 | 5,094 |
Provision | 14,470 | 3,315 | 35,204 | 17,873 |
Valuation allowance, balance at the end of the period | 91,459 | 53,040 | 91,459 | 53,040 |
Ending balance: individually evaluated for impairment |  |  |  |  | $ 2,691
Ending balance: collectively evaluated for impairment |  |  |  |  | 50,664
Financing Receivables: |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss | 5,494,110 |  | 5,494,110 |  | 5,120,664
Ending balance: individually evaluated for impairment |  |  |  |  | 40,737
Ending balance: collectively evaluated for impairment |  |  |  |  | 5,079,927
Real estate |  |  |  |  |
Financing Receivables: |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss | 4,261,537 |  | 4,261,537 |  | 4,192,069
Real estate | Residential 1-4 family |  |  |  |  |
Allowance for credit losses: |  |  |  |  |
Valuation allowance, balance at the beginning of the period | 3,911 | 2,015 | 2,380 | 1,976 |
Charge-offs | 0 | (7) | (7) | (26) |
Recoveries | 12 | 27 | 67 | 644 |
Provision | (286) | (56) | (953) | (615) |
Valuation allowance, balance at the end of the period | 3,637 | 1,979 | 3,637 | 1,979 |
Ending balance: individually evaluated for impairment |  |  |  |  | 898
Ending balance: collectively evaluated for impairment |  |  |  |  | 1,482
Financing Receivables: |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss | 2,195,093 |  | 2,195,093 |  | 2,178,135
Ending balance: individually evaluated for impairment |  |  |  |  | 15,600
Ending balance: collectively evaluated for impairment |  |  |  |  | 2,162,535
Real estate | Commercial real estate |  |  |  |  |
Allowance for credit losses: |  |  |  |  |
Valuation allowance, balance at the beginning of the period | 21,100 | 15,811 | 15,053 | 14,505 |
Charge-offs | 0 | 0 | 0 | 0 |
Recoveries | 0 | 0 | 0 | 0 |
Provision | 11,049 | (396) | 16,888 | 910 |
Valuation allowance, balance at the end of the period | 32,149 | 15,415 | 32,149 | 15,415 |
Ending balance: individually evaluated for impairment |  |  |  |  | 2
Ending balance: collectively evaluated for impairment |  |  |  |  | 15,051
Financing Receivables: |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss | 900,912 |  | 900,912 |  | 824,830
Ending balance: individually evaluated for impairment |  |  |  |  | 1,048
Ending balance: collectively evaluated for impairment |  |  |  |  | 823,782
Real estate | Home equity line of credit |  |  |  |  |
Allowance for credit losses: |  |  |  |  |
Valuation allowance, balance at the beginning of the period | 6,214 | 6,881 | 6,922 | 6,371 |
Charge-offs | 0 | (13) | 0 | (32) |
Recoveries | 50 | 4 | 56 | 13 |
Provision | (390) | 135 | (563) | 655 |
Valuation allowance, balance at the end of the period | 5,874 | 7,007 | 5,874 | 7,007 |
Ending balance: individually evaluated for impairment |  |  |  |  | 322
Ending balance: collectively evaluated for impairment |  |  |  |  | 6,600
Financing Receivables: |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss | 1,028,011 |  | 1,028,011 |  | 1,092,125
Ending balance: individually evaluated for impairment |  |  |  |  | 12,073
Ending balance: collectively evaluated for impairment |  |  |  |  | 1,080,052
Real estate | Residential land |  |  |  |  |
Allowance for credit losses: |  |  |  |  |
Valuation allowance, balance at the beginning of the period | 356 | 537 | 449 | 479 |
Charge-offs | 0 | 0 | (351) | (4) |
Recoveries | 12 | 28 | 26 | 42 |
Provision | 178 | (104) | 486 | (56) |
Valuation allowance, balance at the end of the period | 546 | 461 | 546 | 461 |
Ending balance: individually evaluated for impairment |  |  |  |  | 0
Ending balance: collectively evaluated for impairment |  |  |  |  | 449
Financing Receivables: |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss | 14,310 |  | 14,310 |  | 14,704
Ending balance: individually evaluated for impairment |  |  |  |  | 3,091
Ending balance: collectively evaluated for impairment |  |  |  |  | 11,613
Real estate | Commercial construction |  |  |  |  |
Allowance for credit losses: |  |  |  |  |
Valuation allowance, balance at the beginning of the period | 4,757 | 2,046 | 2,097 | 2,790 |
Charge-offs | 0 | 0 | 0 | 0 |
Recoveries | 0 | 0 | 0 | 0 |
Provision | 1,282 | 196 | 3,653 | (548) |
Valuation allowance, balance at the end of the period | 6,039 | 2,242 | 6,039 | 2,242 |
Ending balance: individually evaluated for impairment |  |  |  |  | 0
Ending balance: collectively evaluated for impairment |  |  |  |  | 2,097
Financing Receivables: |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss | 112,930 |  | 112,930 |  | 70,605
Ending balance: individually evaluated for impairment |  |  |  |  | 0
Ending balance: collectively evaluated for impairment |  |  |  |  | 70,605
Real estate | Residential construction |  |  |  |  |
Allowance for credit losses: |  |  |  |  |
Valuation allowance, balance at the beginning of the period | 14 | 2 | 3 | 4 |
Charge-offs | 0 | 0 | 0 | 0 |
Recoveries | 0 | 0 | 0 | 0 |
Provision | (3) | 1 | (6) | (1) |
Valuation allowance, balance at the end of the period | 11 | 3 | 11 | 3 |
Ending balance: individually evaluated for impairment |  |  |  |  | 0
Ending balance: collectively evaluated for impairment |  |  |  |  | 3
Financing Receivables: |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss | 10,281 |  | 10,281 |  | 11,670
Ending balance: individually evaluated for impairment |  |  |  |  | 0
Ending balance: collectively evaluated for impairment |  |  |  |  | 11,670
Commercial |  |  |  |  |
Allowance for credit losses: |  |  |  |  |
Valuation allowance, balance at the beginning of the period | 13,868 | 13,073 | 10,245 | 9,225 |
Charge-offs | (1,727) | (4,900) | (2,795) | (6,012) |
Recoveries | 211 | 726 | 503 | 2,187 |
Provision | 5,840 | (517) | 9,317 | 2,982 |
Valuation allowance, balance at the end of the period | 18,192 | 8,382 | 18,192 | 8,382 |
Ending balance: individually evaluated for impairment |  |  |  |  | 1,015
Ending balance: collectively evaluated for impairment |  |  |  |  | 9,230
Financing Receivables: |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss | 1,042,435 |  | 1,042,435 |  | 670,674
Ending balance: individually evaluated for impairment |  |  |  |  | 8,418
Ending balance: collectively evaluated for impairment |  |  |  |  | 662,256
Consumer |  |  |  |  |
Allowance for credit losses: |  |  |  |  |
Valuation allowance, balance at the beginning of the period | 31,087 | 18,060 | 16,206 | 16,769 |
Charge-offs | (3,881) | (5,311) | (16,466) | (15,972) |
Recoveries | 1,005 | 746 | 2,426 | 2,208 |
Provision | (3,200) | 4,056 | 6,382 | 14,546 |
Valuation allowance, balance at the end of the period | 25,011 | $ 17,551 | 25,011 | $ 17,551 |
Ending balance: individually evaluated for impairment |  |  |  |  | 454
Ending balance: collectively evaluated for impairment |  |  |  |  | 15,752
Financing Receivables: |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss | $ 190,138 |  | 190,138 |  | 257,921
Ending balance: individually evaluated for impairment |  |  |  |  | 507
Ending balance: collectively evaluated for impairment |  |  |  |  | $ 257,414
Impact of ASU No. 2016-13 |  |  |  |  |
Allowance for credit losses: |  |  |  |  |
Valuation allowance, balance at the beginning of the period |  |  | 19,441 |  |
Impact of ASU No. 2016-13 | Real estate | Residential 1-4 family |  |  |  |  |
Allowance for credit losses: |  |  |  |  |
Valuation allowance, balance at the beginning of the period |  |  | 2,150 |  |
Impact of ASU No. 2016-13 | Real estate | Commercial real estate |  |  |  |  |
Allowance for credit losses: |  |  |  |  |
Valuation allowance, balance at the beginning of the period |  |  | 208 |  |
Impact of ASU No. 2016-13 | Real estate | Home equity line of credit |  |  |  |  |
Allowance for credit losses: |  |  |  |  |
Valuation allowance, balance at the beginning of the period |  |  | (541) |  |
Impact of ASU No. 2016-13 | Real estate | Residential land |  |  |  |  |
Allowance for credit losses: |  |  |  |  |
Valuation allowance, balance at the beginning of the period |  |  | (64) |  |
Impact of ASU No. 2016-13 | Real estate | Commercial construction |  |  |  |  |
Allowance for credit losses: |  |  |  |  |
Valuation allowance, balance at the beginning of the period |  |  | 289 |  |
Impact of ASU No. 2016-13 | Real estate | Residential construction |  |  |  |  |
Allowance for credit losses: |  |  |  |  |
Valuation allowance, balance at the beginning of the period |  |  | 14 |  |
Impact of ASU No. 2016-13 | Commercial |  |  |  |  |
Allowance for credit losses: |  |  |  |  |
Valuation allowance, balance at the beginning of the period |  |  | 922 |  |
Impact of ASU No. 2016-13 | Consumer |  |  |  |  |
Allowance for credit losses: |  |  |  |  |
Valuation allowance, balance at the beginning of the period |  |  | $ 16,463 |  |

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