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Allowance for Loan Losses (Tables) | 9 Months Ended
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Sep. 30, 2016
Receivables [Abstract] |
Age Analysis of Past Due Loans Segregated by Class of Loans | The following tables present the age analysis of past due loans segregated by class of loans as of the dates presented:
| September 30, 2016
(dollars in thousands) | Current | 30-59 Days Past Due | 60-89 Days Past Due | Nonaccrual | Total Past Due | Total Loans
Commercial real estate | $ | 2,413,004 |  | $ | 3,286 |  | $ | 3,323 |  | $ | 7,551 |  | $ | 14,160 |  | $ | 2,427,164 |
Commercial and industrial | 1,327,898 |  | 3,536 |  | 973 |  | 11,890 |  | 16,399 |  | 1,344,297 |
Commercial construction | 394,812 |  | 456 |  | 203 |  | 6,653 |  | 7,312 |  | 402,124 |
Residential mortgage | 679,237 |  | 585 |  | 1,352 |  | 11,400 |  | 13,337 |  | 692,574 |
Home equity | 478,389 |  | 2,321 |  | 270 |  | 2,955 |  | 5,546 |  | 483,935 |
Installment and other consumer | 61,954 |  | 205 |  | 85 |  | 44 |  | 334 |  | 62,288 |
Consumer construction | 5,852 |  | — |  | — |  | — |  | — |  | 5,852 |
Loans held for sale | 11,694 |  | — |  | — |  | — |  | — |  | 11,694 |
Total | $ | 5,372,840 |  | $ | 10,389 |  | $ | 6,206 |  | $ | 40,493 |  | $ | 57,088 |  | $ | 5,429,928 |
| December 31, 2015
(dollars in thousands) | Current | 30-59 Days Past Due | 60-89 Days Past Due | Nonaccrual | Total Past Due | Total Loans
Commercial real estate | $ | 2,145,655 |  | $ | 11,602 |  | $ | 627 |  | $ | 8,719 |  | $ | 20,948 |  | $ | 2,166,603 |
Commercial and industrial | 1,244,802 |  | 2,453 |  | 296 |  | 9,279 |  | 12,028 |  | 1,256,830 |
Commercial construction | 401,084 |  | 3,517 |  | 90 |  | 8,753 |  | 12,360 |  | 413,444 |
Residential mortgage | 631,085 |  | 1,728 |  | 930 |  | 5,629 |  | 8,287 |  | 639,372 |
Home equity | 465,055 |  | 2,365 |  | 523 |  | 2,902 |  | 5,790 |  | 470,845 |
Installment and other consumer | 73,486 |  | 242 |  | 111 |  | 100 |  | 453 |  | 73,939 |
Consumer construction | 6,579 |  | — |  | — |  | — |  | — |  | 6,579 |
Loans held for sale | 35,179 |  | 94 |  | 48 |  | — |  | 142 |  | 35,321 |
Total | $ | 5,002,925 |  | $ | 22,001 |  | $ | 2,625 |  | $ | 35,382 |  | $ | 60,008 |  | $ | 5,062,933 |
Recorded Investment in Commercial Loan Classes by Internally Assigned Risk Ratings | The following tables present the recorded investment in commercial loan classes by internally assigned risk ratings as of the dates presented:
| September 30, 2016
(dollars in thousands) | Commercial Real Estate | % of Total |  | Commercial and Industrial | % of Total |  | Commercial Construction | % of Total |  | Total | % of Total
Pass | $ | 2,346,848 |  | 96.7 | % |  | $ | 1,253,411 |  | 93.2 | % |  | $ | 375,006 |  | 93.2 | % |  | $ | 3,975,265 |  | 95.2 | %
Special mention | 30,050 |  | 1.2 | % |  | 37,079 |  | 2.8 | % |  | 14,335 |  | 3.6 | % |  | 81,464 |  | 2.0 | %
Substandard | 50,266 |  | 2.1 | % |  | 53,807 |  | 4.0 | % |  | 12,783 |  | 3.2 | % |  | 116,856 |  | 2.8 | %
Total | $ | 2,427,164 |  | 100.0 | % |  | $ | 1,344,297 |  | 100.0 | % |  | $ | 402,124 |  | 100.0 | % |  | $ | 4,173,585 |  | 100.0 | %
| December 31, 2015
(dollars in thousands) | Commercial Real Estate | % of Total |  | Commercial and Industrial | % of Total |  | Commercial Construction | % of Total |  | Total | % of Total
Pass | $ | 2,094,851 |  | 96.7 | % |  | $ | 1,182,685 |  | 94.1 | % |  | $ | 375,808 |  | 90.9 | % |  | $ | 3,653,344 |  | 95.2 | %
Special mention | 19,938 |  | 0.9 | % |  | 43,896 |  | 3.5 | % |  | 19,846 |  | 4.8 | % |  | 83,680 |  | 2.2 | %
Substandard | 51,814 |  | 2.4 | % |  | 30,249 |  | 2.4 | % |  | 17,790 |  | 4.3 | % |  | 99,853 |  | 2.6 | %
Total | $ | 2,166,603 |  | 100.0 | % |  | $ | 1,256,830 |  | 100.0 | % |  | $ | 413,444 |  | 100.0 | % |  | $ | 3,836,877 |  | 100.0 | %
Recorded Investment in Consumer Loan Classes by Performing and Nonperforming Status | The following tables present the recorded investment in consumer loan classes by performing and nonperforming status as of the dates presented:
| September 30, 2016
(dollars in thousands) | Residential Mortgage | % of Total | Home Equity | % of Total | Installment and other consumer | % of Total | Consumer Construction | % of Total | Total | % of Total
Performing | $ | 681,174 |  | 98.4 | % | $ | 480,980 |  | 99.4 | % | $ | 62,244 |  | 99.9 | % | $ | 5,852 |  | 100.0 | % | $ | 1,230,250 |  | 98.8 | %
Nonperforming | 11,400 |  | 1.6 | % | 2,955 |  | 0.6 | % | 44 |  | 0.1 | % | — |  | — | % | 14,399 |  | 1.2 | %
Total | $ | 692,574 |  | 100.0 | % | $ | 483,935 |  | 100.0 | % | $ | 62,288 |  | 100.0 | % | $ | 5,852 |  | 100.0 | % | $ | 1,244,649 |  | 100.0 | %
| December 31, 2015
(dollars in thousands) | Residential Mortgage | % of Total | Home Equity | % of Total | Installment and other consumer | % of Total | Consumer Construction | % of Total | Total | % of Total
Performing | $ | 633,743 |  | 99.1 | % | $ | 467,943 |  | 99.4 | % | $ | 73,839 |  | 99.8 | % | $ | 6,579 |  | 100.0 | % | $ | 1,182,104 |  | 99.3 | %
Nonperforming | 5,629 |  | 0.9 | % | 2,902 |  | 0.6 | % | 100 |  | 0.2 | % | — |  | — | % | 8,631 |  | 0.7 | %
Total | $ | 639,372 |  | 100.0 | % | $ | 470,845 |  | 100.0 | % | $ | 73,939 |  | 100.0 | % | $ | 6,579 |  | 100.0 | % | $ | 1,190,735 |  | 100.0 | %
Investments in Loans Considered to be Impaired and Related Information on Impaired Loans |
| For the Nine Months Ended
| September 30, 2016 | September 30, 2015
(dollars in thousands) | Average Recorded Investment | Interest Income Recognized | Average Recorded Investment | Interest Income Recognized
Without a related allowance recorded: |  |  |  |
Commercial real estate | $ | 7,551 |  | $ | 106 |  | $ | 14,994 |  | $ | 731 |
Commercial and industrial | 7,447 |  | 156 |  | 9,742 |  | 131 |
Commercial construction | 8,498 |  | 143 |  | 8,920 |  | 200 |
Consumer real estate | 11,831 |  | 400 |  | 6,856 |  | 279 |
Other consumer | 38 |  | 1 |  | 119 |  | 1 |
Total without a Related Allowance Recorded | 35,365 |  | 806 |  | 40,631 |  | 1,342 |
With a related allowance recorded: |  |  |  |
Commercial real estate | — |  | — |  | — |  | — |
Commercial and industrial | 2,492 |  | 100 |  | 1,980 |  | 42 |
Commercial construction | — |  | — |  | — |  | — |
Consumer real estate | 29 |  | 2 |  | 121 |  | 5 |
Other consumer | 2 |  | — |  | 2 |  | — |
Total with a Related Allowance Recorded | 2,523 |  | 102 |  | 2,103 |  | 47 |
Total: |  |  |  |
Commercial real estate | 7,551 |  | 106 |  | 14,994 |  | 731 |
Commercial and industrial | 9,939 |  | 256 |  | 11,722 |  | 173 |
Commercial construction | 8,498 |  | 143 |  | 8,920 |  | 200 |
Consumer real estate | 11,860 |  | 402 |  | 6,977 |  | 284 |
Other consumer | 40 |  | 1 |  | 121 |  | 1 |
Total | $ | 37,888 |  | $ | 908 |  | $ | 42,734 |  | $ | 1,389 |
The following tables summarize investments in loans considered to be impaired and related information on those impaired loans as of the dates presented:
| September 30, 2016 |  | December 31, 2015
(dollars in thousands) | Recorded Investment | Unpaid Principal Balance | Related Allowance |  | Recorded Investment | Unpaid Principal Balance | Related Allowance
Without a related allowance recorded: |  |  |  |  |  |  |
Commercial real estate | $ | 7,589 |  | $ | 7,818 |  | $ | — |  |  | $ | 12,661 |  | $ | 13,157 |  | $ | — |
Commercial and industrial | 8,261 |  | 9,730 |  | — |  |  | 14,417 |  | 15,220 |  | — |
Commercial construction | 7,987 |  | 11,547 |  | — |  |  | 10,998 |  | 14,200 |  | — |
Consumer real estate | 11,731 |  | 12,434 |  | — |  |  | 6,845 |  | 7,521 |  | — |
Other consumer | 29 |  | 36 |  | — |  |  | 111 |  | 188 |  | — |
Total without a Related Allowance Recorded | 35,597 |  | 41,565 |  | — |  |  | 45,032 |  | 50,286 |  | — |
With a related allowance recorded: |  |  |  |  |  |  |
Commercial real estate | — |  | — |  | — |  |  | — |  | — |  | — |
Commercial and industrial | 2,433 |  | 2,433 |  | 2,206 |  |  | — |  | — |  | — |
Commercial construction | — |  | — |  | — |  |  | 500 |  | 1,350 |  | 3 |
Consumer real estate | 27 |  | 27 |  | 27 |  |  | 116 |  | 116 |  | 32 |
Other consumer | 2 |  | 2 |  | 2 |  |  | 2 |  | 2 |  | 2 |
Total with a Related Allowance Recorded | 2,462 |  | 2,462 |  | 2,235 |  |  | 618 |  | 1,468 |  | 37 |
Total: |  |  |  |  |  |  |
Commercial real estate | 7,589 |  | 7,818 |  | — |  |  | 12,661 |  | 13,157 |  | — |
Commercial and industrial | 10,694 |  | 12,163 |  | 2,206 |  |  | 14,417 |  | 15,220 |  | — |
Commercial construction | 7,987 |  | 11,547 |  | — |  |  | 11,498 |  | 15,550 |  | 3 |
Consumer real estate | 11,758 |  | 12,461 |  | 27 |  |  | 6,961 |  | 7,637 |  | 32 |
Other consumer | 31 |  | 38 |  | 2 |  |  | 113 |  | 190 |  | 2 |
Total | $ | 38,059 |  | $ | 44,027 |  | $ | 2,235 |  |  | $ | 45,650 |  | $ | 51,754 |  | $ | 37 |
The following tables summarize investments in loans considered to be impaired and related information on those impaired loans for the periods presented:
| For the Three Months Ended
| September 30, 2016 | September 30, 2015
(dollars in thousands) | Average Recorded Investment | Interest Income Recognized | Average Recorded Investment | Interest Income Recognized
Without a related allowance recorded: |  |  |  |
Commercial real estate | $ | 7,582 |  | $ | 38 |  | $ | 14,101 |  | $ | 352 |
Commercial and industrial | 7,326 |  | 52 |  | 8,993 |  | 44 |
Commercial construction | 8,039 |  | 49 |  | 11,034 |  | 67 |
Consumer real estate | 11,686 |  | 159 |  | 6,829 |  | 92 |
Other consumer | 32 |  | — |  | 183 |  | — |
Total without a Related Allowance Recorded | 34,665 |  | 298 |  | 41,140 |  | 555 |
With a related allowance recorded: |  |  |  |
Commercial real estate | — |  | — |  | — |  | — |
Commercial and industrial | 2,437 |  | 37 |  | 1,977 |  | 7 |
Commercial construction | — |  | — |  | — |  | — |
Consumer real estate | 28 |  | — |  | 119 |  | 2 |
Other consumer | 2 |  | — |  | 2 |  | — |
Total with a Related Allowance Recorded | 2,467 |  | 37 |  | 2,098 |  | 9 |
Total: |  |  |  |
Commercial real estate | 7,582 |  | 38 |  | 14,101 |  | 352 |
Commercial and industrial | 9,763 |  | 89 |  | 10,970 |  | 51 |
Commercial construction | 8,039 |  | 49 |  | 11,034 |  | 67 |
Consumer real estate | 11,714 |  | 159 |  | 6,948 |  | 94 |
Other consumer | 34 |  | — |  | 185 |  | — |
Total | $ | 37,132 |  | $ | 335 |  | $ | 43,238 |  | $ | 564 |
Summary of Allowance for Loan Losses | The following tables detail activity in the ALL for the periods presented:
| Three Months Ended September 30, 2016
(dollars in thousands) | Commercial Real Estate |  |  | Commercial and Industrial |  |  | Commercial Construction |  |  | Consumer Real Estate |  |  | Other Consumer |  |  | Total Loans |
Balance at beginning of period | $ | 15,978 |  |  | $ | 14,771 |  |  | $ | 11,701 |  |  | $ | 8,418 |  |  | $ | 1,345 |  |  | $ | 52,213 |
Charge-offs | (93 | ) |  | (414 | ) |  | (163 | ) |  | (369 | ) |  | (461 | ) |  | (1,500 | )
Recoveries | 264 |  |  | 169 |  |  | 17 |  |  | 44 |  |  | 70 |  |  | 564 |
Net (Charge-offs)/ Recoveries | 171 |  |  | (245 | ) |  | (146 | ) |  | (325 | ) |  | (391 | ) |  | (936 | )
Provision for loan losses | 4,244 |  |  | (2,232 | ) |  | 1,356 |  |  | (1,760 | ) |  | 908 |  |  | 2,516 |
Balance at End of Period | $ | 20,393 |  |  | $ | 12,294 |  |  | $ | 12,911 |  |  | $ | 6,333 |  |  | $ | 1,862 |  |  | $ | 53,793 |
| Three Months Ended September 30, 2015
(dollars in thousands) | Commercial Real Estate |  |  | Commercial and Industrial |  |  | Commercial Construction |  |  | Consumer Real Estate |  |  | Other Consumer |  |  | Total Loans |
Balance at beginning of period | $ | 19,018 |  |  | $ | 13,308 |  |  | $ | 7,671 |  |  | $ | 7,027 |  |  | $ | 1,790 |  |  | $ | 48,814 |
Charge-offs | (2,361 | ) |  | (1,121 | ) |  | (1,247 | ) |  | (445 | ) |  | (467 | ) |  | (5,641 | )
Recoveries | 2,896 |  |  | 272 |  |  | 129 |  |  | 132 |  |  | 99 |  |  | 3,528 |
Net (Charge-offs)/ Recoveries | 535 |  |  | (849 | ) |  | (1,118 | ) |  | (313 | ) |  | (368 | ) |  | (2,113 | )
Provision for loan losses | (2,575 | ) |  | 12 |  |  | 4,983 |  |  | 302 |  |  | 484 |  |  | 3,206 |
Balance at End of Period | $ | 16,978 |  |  | $ | 12,471 |  |  | $ | 11,536 |  |  | $ | 7,016 |  |  | $ | 1,906 |  |  | $ | 49,907 |
| Nine Months Ended September 30, 2016
(dollars in thousands) | Commercial Real Estate |  | Commercial and Industrial |  | Commercial Construction |  | Consumer Real Estate |  | Other Consumer |  | Total Loans
Balance at beginning of period | $ | 15,043 |  |  | $ | 10,853 |  |  | $ | 12,625 |  |  | $ | 8,400 |  |  | $ | 1,226 |  |  | $ | 48,147 |
Charge-offs | (1,808 | ) |  | (3,244 | ) |  | (1,108 | ) |  | (891 | ) |  | (1,572 | ) |  | (8,623 | )
Recoveries | 662 |  |  | 589 |  |  | 20 |  |  | 342 |  |  | 277 |  |  | 1,890 |
Net (Charge-offs)/Recoveries | (1,146 | ) |  | (2,655 | ) |  | (1,088 | ) |  | (549 | ) |  | (1,295 | ) |  | (6,733 | )
Provision for loan losses | 6,496 |  |  | 4,096 |  |  | 1,374 |  |  | (1,518 | ) |  | 1,931 |  |  | 12,379 |
Balance at End of Period | $ | 20,393 |  |  | $ | 12,294 |  |  | $ | 12,911 |  |  | $ | 6,333 |  |  | $ | 1,862 |  |  | $ | 53,793 |
| Nine Months Ended September 30, 2015
(dollars in thousands) | Commercial Real Estate |  | Commercial and Industrial |  | Commercial Construction |  | Consumer Real Estate |  | Other Consumer |  | Total Loans
Balance at beginning of period | $ | 20,164 |  |  | $ | 13,668 |  |  | $ | 6,093 |  |  | $ | 6,333 |  |  | $ | 1,653 |  |  | $ | 47,911 |
Charge-offs | (2,738 | ) |  | (2,819 | ) |  | (1,247 | ) |  | (997 | ) |  | (1,046 | ) |  | (8,847 | )
Recoveries | 3,072 |  |  | 475 |  |  | 132 |  |  | 379 |  |  | 312 |  |  | 4,370 |
Net (Charge-offs)/Recoveries | 334 |  |  | (2,344 | ) |  | (1,115 | ) |  | (618 | ) |  | (734 | ) |  | (4,477 | )
Provision for loan losses | (3,520 | ) |  | 1,147 |  |  | 6,558 |  |  | 1,301 |  |  | 987 |  |  | 6,473 |
Balance at End of Period | $ | 16,978 |  |  | $ | 12,471 |  |  | $ | 11,536 |  |  | $ | 7,016 |  |  | $ | 1,906 |  |  | $ | 49,907 |
Summary of Allowance for Loan Losses and Recorded Investments | The following tables present the ALL and recorded investments in loans by category as of the periods presented:
| September 30, 2016
| Allowance for Loan Losses |  | Portfolio Loans
(dollars in thousands) | Individually Evaluated for Impairment |  | Collectively Evaluated for Impairment |  | Total |  |  | Individually Evaluated for Impairment |  | Collectively Evaluated for Impairment |  | Total |
Commercial real estate | $ | — |  | $ | 20,393 |  | $ | 20,393 |  |  | $ | 7,589 |  | $ | 2,419,575 |  | $ | 2,427,164 |
Commercial and industrial | 2,206 |  | 10,088 |  | 12,294 |  |  | 10,694 |  | 1,333,603 |  | 1,344,297 |
Commercial construction | — |  | 12,911 |  | 12,911 |  |  | 7,987 |  | 394,137 |  | 402,124 |
Consumer real estate | 27 |  | 6,306 |  | 6,333 |  |  | 11,758 |  | 1,170,603 |  | 1,182,361 |
Other consumer | 2 |  | 1,860 |  | 1,862 |  |  | 31 |  | 62,257 |  | 62,288 |
Total | $ | 2,235 |  | $ | 51,558 |  | $ | 53,793 |  |  | $ | 38,059 |  | $ | 5,380,175 |  | $ | 5,418,234 |
| December 31, 2015
| Allowance for Loan Losses |  | Portfolio Loans
(dollars in thousands) | Individually Evaluated for Impairment |  | Collectively Evaluated for Impairment |  | Total |  |  | Individually Evaluated for Impairment |  | Collectively Evaluated for Impairment |  | Total |
Commercial real estate | $ | — |  | $ | 15,043 |  | $ | 15,043 |  |  | $ | 12,661 |  | $ | 2,153,942 |  | $ | 2,166,603 |
Commercial and industrial | — |  | 10,853 |  | 10,853 |  |  | 14,417 |  | 1,242,413 |  | 1,256,830 |
Commercial construction | 3 |  | 12,622 |  | 12,625 |  |  | 11,498 |  | 401,946 |  | 413,444 |
Consumer real estate | 32 |  | 8,368 |  | 8,400 |  |  | 6,961 |  | 1,109,835 |  | 1,116,796 |
Other consumer | 2 |  | 1,224 |  | 1,226 |  |  | 113 |  | 73,826 |  | 73,939 |
Total | $ | 37 |  | $ | 48,110 |  | $ | 48,147 |  |  | $ | 45,650 |  | $ | 4,981,962 |  | $ | 5,027,612 |

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- Definition Tabular disclosure of financing receivables by credit quality indicator. The credit quality indicator is a statistic about the credit quality of financing receivables. Examples include, but not limited to, consumer credit risk scores, credit-rating-agency ratings, an entity's internal credit risk grades, loan-to-value ratios, collateral, collection experience and other internal metrics. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 55 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=32702940&loc=SL6953803-111525 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 29 -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953659-111524 + Details
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