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Loans and Allowance - Changes in Allowance for Loan Losses by Loan Segment (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Allowance for loan losses: |  |  |  |
Beginning balance | $ 121,119 | $ 81,274 | $ 80,284 | $ 80,552
Provision for losses | 12,544 | 600 | 54,191 | 2,300
Recoveries on loans | 427 | 596 | 1,417 | 3,035
Loans charged off | (7,364) | (1,899) | (9,166) | (5,316)
Ending balance | 126,726 | 80,571 | 126,726 | 80,571
Commercial |  |  |  |
Allowance for loan losses: |  |  |  |
Beginning balance | 44,678 | 33,202 | 32,902 | 32,657
Provision for losses | 7,299 | 130 | 19,240 | 466
Recoveries on loans | 197 | 149 | 746 | 1,035
Loans charged off | (6,827) | (480) | (7,541) | (1,157)
Ending balance | 45,347 | 33,001 | 45,347 | 33,001
Commercial Real Estate |  |  |  |
Allowance for loan losses: |  |  |  |
Beginning balance | 46,918 | 29,531 | 28,778 | 29,609
Provision for losses | 2,990 | 370 | 21,129 | 1,459
Recoveries on loans | 46 | 143 | 271 | 1,166
Loans charged off | 0 | (1,078) | (224) | (3,268)
Ending balance | 49,954 | 28,966 | 49,954 | 28,966
Consumer |  |  |  |
Allowance for loan losses: |  |  |  |
Beginning balance | 8,445 | 4,070 | 4,035 | 3,964
Provision for losses | 971 | 40 | 5,678 | 181
Recoveries on loans | 54 | 105 | 152 | 323
Loans charged off | (92) | (109) | (487) | (362)
Ending balance | 9,378 | 4,106 | 9,378 | 4,106
Residential |  |  |  |
Allowance for loan losses: |  |  |  |
Beginning balance | 21,078 | 14,471 | 14,569 | 14,322
Provision for losses | 1,284 | 60 | 8,144 | 194
Recoveries on loans | 130 | 199 | 248 | 511
Loans charged off | (445) | (232) | (914) | (529)
Ending balance | $ 22,047 | $ 14,498 | $ 22,047 | $ 14,498

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- Definition Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss. + References Reference 1: 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=121611835&loc=SL6953423-111524 + Details
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- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=121614798&loc=d3e15032-111544 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 6.L.1) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74567-122707 + Details
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- Definition Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -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 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 + Details
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