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Loans and the Allowance for Loan Losses (Details) - Aging analysis - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |  |
Nonaccrual |  | $ 61,696 | $ 49,481
Total Past Due |  | 98,000 | 58,797
Current |  | 6,149,681 | 5,059,497
Loans |  | 6,247,681 | 5,118,294
30 - 59 Days Past Due [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Past Due |  | 18,544 | 5,576
60 - 89 Days Past Due [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Past Due |  | 4,939 | 633
90 Days or Greater Past Due [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Past Due |  | 12,821 | 3,107
Commercial Portfolio Segment [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Nonaccrual |  | 33,019 | 31,455
Total Past Due |  | 38,204 | 34,801
Current |  | 1,483,763 | 1,094,860
Loans | [1] | 1,521,967 | 1,129,661
Commercial Portfolio Segment [Member] | 30 - 59 Days Past Due [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Past Due |  | 1,445 | 239
Commercial Portfolio Segment [Member] | 60 - 89 Days Past Due [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Past Due |  | 558 |
Commercial Portfolio Segment [Member] | 90 Days or Greater Past Due [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Past Due |  | 3,182 | 3,107
Commercial Real Estate Portfolio Segment [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Nonaccrual |  | 10,111 | 8,338
Total Past Due |  | 33,064 | 10,808
Current |  | 3,750,486 | 3,031,151
Loans |  | 3,783,550 | 3,041,959
Commercial Real Estate Portfolio Segment [Member] | 30 - 59 Days Past Due [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Past Due |  | 13,258 | 1,980
Commercial Real Estate Portfolio Segment [Member] | 60 - 89 Days Past Due [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Past Due |  | 4,140 | 490
Commercial Real Estate Portfolio Segment [Member] | 90 Days or Greater Past Due [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Past Due |  | 5,555 |
Commercial construction [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Nonaccrual |  | 14,015 | 6,773
Total Past Due |  | 16,487 | 6,773
Current |  | 601,260 | 616,553
Loans |  | 617,747 | 623,326
Commercial construction [Member] | 30 - 59 Days Past Due [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Past Due |  | 2,472 |
Commercial construction [Member] | 60 - 89 Days Past Due [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Past Due |  |  |
Commercial construction [Member] | 90 Days or Greater Past Due [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Past Due |  |  |
Residential Portfolio Segment [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Nonaccrual |  | 4,551 | 2,915
Total Past Due |  | 10,243 | 6,415
Current |  | 312,321 | 313,605
Loans |  | 322,564 | 320,020
Residential Portfolio Segment [Member] | 30 - 59 Days Past Due [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Past Due |  | 1,367 | 3,357
Residential Portfolio Segment [Member] | 60 - 89 Days Past Due [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Past Due |  | 241 | 143
Residential Portfolio Segment [Member] | 90 Days or Greater Past Due [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Past Due |  | 4,084 |
Consumer Portfolio Segment [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Nonaccrual |  |  |
Total Past Due |  | 2 |
Current |  | 1,851 | 3,328
Loans |  | 1,853 | 3,328
Consumer Portfolio Segment [Member] | 30 - 59 Days Past Due [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Past Due |  | 2 |
Consumer Portfolio Segment [Member] | 60 - 89 Days Past Due [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Past Due |  |  |
Consumer Portfolio Segment [Member] | 90 Days or Greater Past Due [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Past Due |  |  |
[1] | Included in commercial loans as of December 31, 2020 were PPP loans of $397.5 million.

X
- Definition Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements. + References No definition available. + Details
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