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Loans and the Allowance for Loan Losses (Details) - Aging analysis - USD ($) $ in Thousands | Sep. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual | $ 51,321 | $ 51,855
Total Past Due and Nonaccrual | 63,056 | 69,811
Current | 5,052,417 | 4,475,088
Gross Loans | 5,115,473 | 4,544,899
Commercial Portfolio Segment [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual | 33,781 | 29,340
Total Past Due and Nonaccrual | 44,129 | 32,660
Current | 1,069,614 | 956,098
Gross Loans | 1,113,743 | 988,758
Commercial Real Estate Portfolio Segment [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual | 7,529 | 15,135
Total Past Due and Nonaccrual | 8,218 | 23,137
Current | 3,022,598 | 2,755,030
Gross Loans | 3,030,816 | 2,778,167
Commercial Construction Portfolio Segment [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual | 7,101 | 2,934
Total Past Due and Nonaccrual | 7,101 | 5,994
Current | 639,071 | 459,395
Gross Loans | 646,172 | 465,389
Residential Real Estate Portfolio Segment [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual | 2,910 | 4,446
Total Past Due and Nonaccrual | 3,608 | 8,020
Current | 318,699 | 301,971
Gross Loans | 322,307 | 309,991
Consumer Portfolio Segment [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual |  |
Total Past Due and Nonaccrual |  |
Current | 2,435 | 2,594
Gross Loans | 2,435 | 2,594
30 - 59 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due and Nonaccrual | 6,510 | 13,786
30 - 59 Days Past Due [Member] | Commercial Portfolio Segment [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due and Nonaccrual | 5,812 | 1,673
30 - 59 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due and Nonaccrual |  | 6,162
30 - 59 Days Past Due [Member] | Commercial Construction Portfolio Segment [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due and Nonaccrual |  | 2,496
30 - 59 Days Past Due [Member] | Residential Real Estate Portfolio Segment [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due and Nonaccrual | 698 | 3,455
30 - 59 Days Past Due [Member] | Consumer Portfolio Segment [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due and Nonaccrual |  |
60 - 89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due and Nonaccrual | 2,127 | 2,523
60 - 89 Days Past Due [Member] | Commercial Portfolio Segment [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due and Nonaccrual | 1,438 |
60 - 89 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due and Nonaccrual | 689 | 1,840
60 - 89 Days Past Due [Member] | Commercial Construction Portfolio Segment [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due and Nonaccrual |  | 564
60 - 89 Days Past Due [Member] | Residential Real Estate Portfolio Segment [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due and Nonaccrual |  | 119
60 - 89 Days Past Due [Member] | Consumer Portfolio Segment [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due and Nonaccrual |  |
90 Days or Greater Past Due and Still Accruing [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due and Nonaccrual | 3,098 | 1,647
90 Days or Greater Past Due and Still Accruing [Member] | Commercial Portfolio Segment [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due and Nonaccrual | 3,098 | 1,647
90 Days or Greater Past Due and Still Accruing [Member] | Commercial Real Estate Portfolio Segment [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due and Nonaccrual |  |
90 Days or Greater Past Due and Still Accruing [Member] | Commercial Construction Portfolio Segment [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due and Nonaccrual |  |
90 Days or Greater Past Due and Still Accruing [Member] | Residential Real Estate Portfolio Segment [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due and Nonaccrual |  |
90 Days or Greater Past Due and Still Accruing [Member] | Consumer Portfolio Segment [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due and Nonaccrual |  |

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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