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Loans, Allowance for Credit Losses and Credit Quality Financing Receivable, Allowance for Credit Loss (Details) - USD ($) $ in Thousands | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Dec. 31, 2020 | Dec. 31, 2019
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |
Financing Receivable, Allowance for Credit Loss | $ 107,549 |  | $ 113,392 | $ 67,740
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method |  | $ (1,137) |  |
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase | 1,200 | 1,157 |  |
Allowance for Loan and Lease Losses, Write-offs | (3,686) |  |  |
Allowance for Loan and Lease Loss, Recovery of Bad Debts | 343 |  |  |
Provision for Loan and Lease Losses | (2,500) |  |  |
Loans and Leases Receivable, Allowance | 107,549 | 92,376 | 113,392 |
Provision for credit losses | (2,500) | 25,000 |  |
Allowance for Loan and Lease Loss, Recovery of Bad Debts |  | 350 |  |
Allowance for Loan and Lease Losses, Write-offs |  | (734) |  |
Commercial And Industrial [Member] |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |
Financing Receivable, Allowance for Credit Loss | 20,207 |  | 21,086 | 17,594
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method |  | (1,984) |  |
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase |  | 49 |  |
Allowance for Loan and Lease Losses, Write-offs | (3,331) |  |  |
Allowance for Loan and Lease Loss, Recovery of Bad Debts | 64 |  |  |
Provision for Loan and Lease Losses | 2,388 |  |  |
Loans and Leases Receivable, Allowance |  | 21,649 |  |
Provision for credit losses |  | 5,948 |  |
Allowance for Loan and Lease Loss, Recovery of Bad Debts |  | 42 |  |
Allowance for Loan and Lease Losses, Write-offs |  | 0 |  |
Commercial Real Estate [Member] |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |
Financing Receivable, Allowance for Credit Loss | 44,348 |  | 45,009 | 32,935
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method |  | (13,048) |  |
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase |  | 337 |  |
Allowance for Loan and Lease Losses, Write-offs | 0 |  |  |
Allowance for Loan and Lease Loss, Recovery of Bad Debts | 57 |  |  |
Provision for Loan and Lease Losses | (718) |  |  |
Loans and Leases Receivable, Allowance |  | 29,498 |  |
Provision for credit losses |  | 9,274 |  |
Allowance for Loan and Lease Loss, Recovery of Bad Debts |  | 0 |  |
Allowance for Loan and Lease Losses, Write-offs |  | 0 |  |
Construction Loans [Member] |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |
Financing Receivable, Allowance for Credit Loss | 5,268 |  | 5,397 | 6,053
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method |  | (3,652) |  |
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase |  | 0 |  |
Allowance for Loan and Lease Losses, Write-offs | 0 |  |  |
Allowance for Loan and Lease Loss, Recovery of Bad Debts | 0 |  |  |
Provision for Loan and Lease Losses | (129) |  |  |
Loans and Leases Receivable, Allowance |  | 3,747 |  |
Provision for credit losses |  | 1,346 |  |
Allowance for Loan and Lease Loss, Recovery of Bad Debts |  | 0 |  |
Allowance for Loan and Lease Losses, Write-offs |  | 0 |  |
Small Business [Member] |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |
Financing Receivable, Allowance for Credit Loss | 3,621 |  | 5,095 | 1,746
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method |  | 495 |  |
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase |  | 0 |  |
Allowance for Loan and Lease Losses, Write-offs | (66) |  |  |
Allowance for Loan and Lease Loss, Recovery of Bad Debts | 11 |  |  |
Provision for Loan and Lease Losses | (1,419) |  |  |
Loans and Leases Receivable, Allowance |  | 3,829 |  |
Provision for credit losses |  | 1,694 |  |
Allowance for Loan and Lease Loss, Recovery of Bad Debts |  | 3 |  |
Allowance for Loan and Lease Losses, Write-offs |  | (109) |  |
Residential Real Estate [Member] |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |
Financing Receivable, Allowance for Credit Loss | 12,956 |  | 14,275 | 3,440
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method |  | 9,828 |  |
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase |  | 423 |  |
Allowance for Loan and Lease Losses, Write-offs | 0 |  |  |
Allowance for Loan and Lease Loss, Recovery of Bad Debts | 1 |  |  |
Provision for Loan and Lease Losses | (1,320) |  |  |
Loans and Leases Receivable, Allowance |  | 14,847 |  |
Provision for credit losses |  | 1,155 |  |
Allowance for Loan and Lease Loss, Recovery of Bad Debts |  | 1 |  |
Allowance for Loan and Lease Losses, Write-offs |  | 0 |  |
Home Equity Line of Credit [Member] |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |
Financing Receivable, Allowance for Credit Loss | 20,716 |  | 22,060 | 5,576
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method |  | 7,012 |  |
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase |  | 319 |  |
Allowance for Loan and Lease Losses, Write-offs | 0 |  |  |
Allowance for Loan and Lease Loss, Recovery of Bad Debts | 13 |  |  |
Provision for Loan and Lease Losses | (1,357) |  |  |
Loans and Leases Receivable, Allowance |  | 17,910 |  |
Provision for credit losses |  | 5,083 |  |
Allowance for Loan and Lease Loss, Recovery of Bad Debts |  | 58 |  |
Allowance for Loan and Lease Losses, Write-offs |  | (138) |  |
Consumer - Other [Member] |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |
Financing Receivable, Allowance for Credit Loss | 433 |  | $ 470 | $ 396
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method |  | 212 |  |
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase |  | 29 |  |
Allowance for Loan and Lease Losses, Write-offs | (289) |  |  |
Allowance for Loan and Lease Loss, Recovery of Bad Debts | 197 |  |  |
Provision for Loan and Lease Losses | $ 55 |  |  |
Loans and Leases Receivable, Allowance |  | 896 |  |
Provision for credit losses |  | 500 |  |
Allowance for Loan and Lease Loss, Recovery of Bad Debts |  | 246 |  |
Allowance for Loan and Lease Losses, Write-offs |  | $ (487) |  |

X
- 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 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 increase in allowance for credit loss on financing receivable purchased with credit deterioration. + 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 (c) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 + Details
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- Definition Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement. + 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)(1) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(7)(2)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121599878&loc=SL82895884-210446 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 + Details
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- Definition The effect of a change in method or methods for calculating the allowance for credit losses on the current period provision. + 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 (d) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 + Details
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- Definition Amount of increase in allowance for credit loss on financing receivable from recovery. + References Reference 1: 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=121647567&loc=SL82922352-210448 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 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)(4) -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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