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Allowance for Loan Losses (Tables) | 6 Months Ended
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Jun. 30, 2017
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:
| June 30, 2017
(dollars in thousands) | Current |  | 30-59 Days Past Due |  | 60-89 Days Past Due |  | Nonaccrual |  | Total Past Due |  | Total Loans
Commercial real estate | $ | 2,653,680 |  |  | $ | 2,846 |  |  | $ | 917 |  |  | $ | 7,199 |  |  | $ | 10,962 |  |  | $ | 2,664,642 |
Commercial and industrial | 1,381,657 |  |  | 1,454 |  |  | 754 |  |  | 17,418 |  |  | 19,626 |  |  | 1,401,283 |
Commercial construction | 424,254 |  |  | 187 |  |  | — |  |  | 2,313 |  |  | 2,500 |  |  | 426,754 |
Residential mortgage | 694,800 |  |  | 3,506 |  |  | 781 |  |  | 7,056 |  |  | 11,343 |  |  | 706,143 |
Home equity | 479,190 |  |  | 2,620 |  |  | 508 |  |  | 2,642 |  |  | 5,770 |  |  | 484,960 |
Installment and other consumer | 69,756 |  |  | 211 |  |  | 60 |  |  | 41 |  |  | 312 |  |  | 70,068 |
Consumer construction | 3,969 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 3,969 |
Loans held for sale | 23,120 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 23,120 |
Total | $ | 5,730,426 |  |  | $ | 10,824 |  |  | $ | 3,020 |  |  | $ | 36,669 |  |  | $ | 50,513 |  |  | $ | 5,780,939 |
| December 31, 2016
(dollars in thousands) | Current |  | 30-59 Days Past Due |  | 60-89 Days Past Due |  | Nonaccrual |  | Total Past Due |  | Total Loans
Commercial real estate | $ | 2,479,513 |  |  | $ | 2,032 |  |  | $ | 759 |  |  | $ | 16,172 |  |  | $ | 18,963 |  |  | $ | 2,498,476 |
Commercial and industrial | 1,391,475 |  |  | 1,061 |  |  | 428 |  |  | 8,071 |  |  | 9,560 |  |  | 1,401,035 |
Commercial construction | 450,410 |  |  | 547 |  |  | — |  |  | 4,927 |  |  | 5,474 |  |  | 455,884 |
Residential mortgage | 689,635 |  |  | 1,312 |  |  | 1,117 |  |  | 9,918 |  |  | 12,347 |  |  | 701,982 |
Home equity | 476,866 |  |  | 1,470 |  |  | 509 |  |  | 3,439 |  |  | 5,418 |  |  | 482,284 |
Installment and other consumer | 65,525 |  |  | 176 |  |  | 43 |  |  | 108 |  |  | 327 |  |  | 65,852 |
Consumer construction | 5,906 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 5,906 |
Loans held for sale | 3,793 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 3,793 |
Total | $ | 5,563,123 |  |  | $ | 6,598 |  |  | $ | 2,856 |  |  | $ | 42,635 |  |  | $ | 52,089 |  |  | $ | 5,615,212 |
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:
| June 30, 2017
(dollars in thousands) | Commercial Real Estate | % of Total |  | Commercial and Industrial | % of Total |  | Commercial Construction | % of Total |  | Total | % of Total
Pass | $ | 2,574,835 |  | 96.6 | % |  | $ | 1,290,204 |  | 92.1 | % |  | $ | 402,199 |  | 94.2 | % |  | $ | 4,267,238 |  | 95.0 | %
Special mention | 57,197 |  | 2.2 | % |  | 62,033 |  | 4.4 | % |  | 16,468 |  | 3.9 | % |  | 135,698 |  | 3.0 | %
Substandard | 32,610 |  | 1.2 | % |  | 49,046 |  | 3.5 | % |  | 8,087 |  | 1.9 | % |  | 89,743 |  | 2.0 | %
Total | $ | 2,664,642 |  | 100.0 | % |  | $ | 1,401,283 |  | 100.0 | % |  | $ | 426,754 |  | 100.0 | % |  | $ | 4,492,679 |  | 100.0 | %
| December 31, 2016
(dollars in thousands) | Commercial Real Estate | % of Total |  | Commercial and Industrial | % of Total |  | Commercial Construction | % of Total |  | Total | % of Total
Pass | $ | 2,423,742 |  | 97.0 | % |  | $ | 1,315,507 |  | 93.9 | % |  | $ | 430,472 |  | 94.4 | % |  | $ | 4,169,721 |  | 95.7 | %
Special mention | 33,098 |  | 1.3 | % |  | 40,409 |  | 2.9 | % |  | 14,691 |  | 3.2 | % |  | 88,198 |  | 2.0 | %
Substandard | 41,636 |  | 1.7 | % |  | 45,119 |  | 3.2 | % |  | 10,721 |  | 2.4 | % |  | 97,476 |  | 2.3 | %
Total | $ | 2,498,476 |  | 100.0 | % |  | $ | 1,401,035 |  | 100.0 | % |  | $ | 455,884 |  | 100.0 | % |  | $ | 4,355,395 |  | 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:
| June 30, 2017
(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 | $ | 699,087 |  | 99.0 | % |  | $ | 482,318 |  | 99.5 | % |  | $ | 70,027 |  | 99.9 | % |  | $ | 3,969 |  | 100.0 | % |  | $ | 1,255,401 |  | 99.2 | %
Nonperforming | 7,056 |  | 1.0 | % |  | 2,642 |  | 0.5 | % |  | 41 |  | 0.1 | % |  | — |  | — | % |  | 9,739 |  | 0.8 | %
Total | $ | 706,143 |  | 100.0 | % |  | $ | 484,960 |  | 100.0 | % |  | $ | 70,068 |  | 100.0 | % |  | $ | 3,969 |  | 100.0 | % |  | $ | 1,265,140 |  | 100.0 | %
| December 31, 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 | $ | 692,064 |  | 98.6 | % |  | $ | 478,845 |  | 99.3 | % |  | $ | 65,744 |  | 99.8 | % |  | $ | 5,906 |  | 100.0 | % |  | $ | 1,242,559 |  | 98.9 | %
Nonperforming | 9,918 |  | 1.4 | % |  | 3,439 |  | 0.7 | % |  | 108 |  | 0.2 | % |  | — |  | — | % |  | 13,465 |  | 1.1 | %
Total | $ | 701,982 |  | 100.0 | % |  | $ | 482,284 |  | 100.0 | % |  | $ | 65,852 |  | 100.0 | % |  | $ | 5,906 |  | 100.0 | % |  | $ | 1,256,024 |  | 100.0 | %
Investments in Loans Considered to be Impaired and Related Information on Impaired Loans | The following table summarizes investments in loans considered to be impaired and related information on those impaired loans as of the dates presented:
| June 30, 2017 |  | December 31, 2016
(dollars in thousands) | Recorded Investment |  | Unpaid Principal Balance |  | Related Allowance |  | Recorded Investment |  | Unpaid Principal Balance |  | Related Allowance
With a related allowance recorded: |  |  |  |  |  |  |  |  |  |  |
Commercial real estate | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Commercial and industrial | 2,443 |  |  | 2,443 |  |  | 340 |  |  | 964 |  |  | 2,433 |  |  | 771 |
Commercial construction | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Consumer real estate | 24 |  |  | 24 |  |  | 24 |  |  | 26 |  |  | 26 |  |  | 26 |
Other consumer | 25 |  |  | 25 |  |  | 25 |  |  | 1 |  |  | 1 |  |  | 1 |
Total with a Related Allowance Recorded | 2,492 |  |  | 2,492 |  |  | 389 |  |  | 991 |  |  | 2,460 |  |  | 798 |
Without a related allowance recorded: |  |  |  |  |  |  |  |  |  |  |
Commercial real estate | 6,472 |  |  | 7,472 |  |  | — |  |  | 16,352 |  |  | 17,654 |  |  | — |
Commercial and industrial | 16,125 |  |  | 18,097 |  |  | — |  |  | 5,902 |  |  | 7,699 |  |  | — |
Commercial construction | 4,257 |  |  | 6,295 |  |  | — |  |  | 6,613 |  |  | 10,306 |  |  | — |
Consumer real estate | 11,106 |  |  | 12,024 |  |  | — |  |  | 12,053 |  |  | 12,849 |  |  | — |
Other consumer | 10 |  |  | 13 |  |  | — |  |  | 24 |  |  | 31 |  |  | — |
Total without a Related Allowance Recorded | 37,970 |  |  | 43,901 |  |  | — |  |  | 40,944 |  |  | 48,539 |  |  | — |
Total: |  |  |  |  |  |  |  |  |  |  |
Commercial real estate | 6,472 |  |  | 7,472 |  |  | — |  |  | 16,352 |  |  | 17,654 |  |  | — |
Commercial and industrial | 18,568 |  |  | 20,540 |  |  | 340 |  |  | 6,866 |  |  | 10,132 |  |  | 771 |
Commercial construction | 4,257 |  |  | 6,295 |  |  | — |  |  | 6,613 |  |  | 10,306 |  |  | — |
Consumer real estate | 11,130 |  |  | 12,048 |  |  | 24 |  |  | 12,079 |  |  | 12,875 |  |  | 26 |
Other consumer | 35 |  |  | 38 |  |  | 25 |  |  | 25 |  |  | 32 |  |  | 1 |
Total | $ | 40,462 |  |  | $ | 46,393 |  |  | $ | 389 |  |  | $ | 41,935 |  |  | $ | 50,999 |  |  | $ | 798 |
The following table summarizes average recorded investment in and interest income recognized on loans considered to be impaired for the periods presented:
| Three Months Ended
| June 30, 2017 |  | June 30, 2016
(dollars in thousands) | Average Recorded Investment |  | Interest Income Recognized |  | Average Recorded Investment |  | Interest Income Recognized
With a related allowance recorded: |  |  |  |  |  |  |
Commercial real estate | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Commercial and industrial | 813 |  |  | 6 |  |  | 4,617 |  |  | 31 |
Commercial construction | — |  |  | — |  |  | 1,232 |  |  | 6 |
Consumer real estate | 24 |  |  | 1 |  |  | 29 |  |  | 1 |
Other consumer | 26 |  |  | — |  |  | 1 |  |  | — |
Total with a Related Allowance Recorded | 863 |  |  | 7 |  |  | 5,879 |  |  | 38 |
Without a related allowance recorded: |  |  |  |  |  |  |
Commercial real estate | 6,934 |  |  | 35 |  |  | 14,619 |  |  | 64 |
Commercial and industrial | 17,625 |  |  | 95 |  |  | 10,959 |  |  | 98 |
Commercial construction | 4,262 |  |  | 42 |  |  | 10,625 |  |  | 48 |
Consumer real estate | 11,280 |  |  | 125 |  |  | 11,028 |  |  | 107 |
Other consumer | 11 |  |  | 1 |  |  | 38 |  |  | — |
Total without a Related Allowance Recorded | 40,112 |  |  | 298 |  |  | 47,269 |  |  | 317 |
Total: |  |  |  |  |  |  |
Commercial real estate | 6,934 |  |  | 35 |  |  | 14,619 |  |  | 64 |
Commercial and industrial | 18,438 |  |  | 101 |  |  | 15,576 |  |  | 129 |
Commercial construction | 4,262 |  |  | 42 |  |  | 11,857 |  |  | 54 |
Consumer real estate | 11,304 |  |  | 126 |  |  | 11,057 |  |  | 108 |
Other consumer | 37 |  |  | 1 |  |  | 39 |  |  | — |
Total | $ | 40,975 |  |  | $ | 305 |  |  | $ | 53,148 |  |  | $ | 355 |
| Six Months Ended
| June 30, 2017 | June 30, 2016
(dollars in thousands) | Average Recorded Investment | Interest Income Recognized | Average Recorded Investment | Interest Income Recognized
With a related allowance recorded: |  |  |  |
Commercial real estate | $ | — |  | $ | — |  | $ | — |  | $ | — |
Commercial and industrial | 628 |  | 11 |  | 4,999 |  | 63 |
Commercial construction | — |  | — |  | 1,244 |  | 12 |
Consumer real estate | 25 |  | 1 |  | 30 |  | 1 |
Other consumer | 27 |  | 1 |  | 2 |  | — |
Total with a Related Allowance Recorded | 680 |  | 13 |  | 6,275 |  | 76 |
Without a related allowance recorded: |  |  |  |
Commercial real estate | 7,028 |  | 70 |  | 14,798 |  | 132 |
Commercial and industrial | 16,382 |  | 124 |  | 11,253 |  | 189 |
Commercial construction | 4,267 |  | 79 |  | 10,669 |  | 108 |
Consumer real estate | 11,514 |  | 255 |  | 11,089 |  | 243 |
Other consumer | 12 |  | — |  | 40 |  | 1 |
Total without a Related Allowance Recorded | 39,203 |  | 528 |  | 47,849 |  | 673 |
Total: |  |  |  |
Commercial real estate | 7,028 |  | 70 |  | 14,798 |  | 132 |
Commercial and industrial | 17,010 |  | 135 |  | 16,252 |  | 252 |
Commercial construction | 4,267 |  | 79 |  | 11,913 |  | 120 |
Consumer real estate | 11,539 |  | 256 |  | 11,119 |  | 244 |
Other consumer | 39 |  | 1 |  | 42 |  | 1 |
Total | $ | 39,883 |  | $ | 541 |  | $ | 54,124 |  | $ | 749 |
Summary of Allowance for Loan Losses | The following tables detail activity in the ALL for the periods presented:
| Three Months Ended June 30, 2017
(dollars in thousands) | Commercial Real Estate |  | Commercial and Industrial |  | Commercial Construction |  | Consumer Real Estate |  | Other Consumer |  | Total Loans
Balance at beginning of period | $ | 20,570 |  |  | $ | 13,244 |  |  | $ | 14,102 |  |  | $ | 5,956 |  |  | $ | 1,944 |  |  | $ | 55,816 |
Charge-offs | (1,673 | ) |  | (2,682 | ) |  | — |  |  | (1,097 | ) |  | (370 | ) |  | (5,822 | )
Recoveries | 155 |  |  | 69 |  |  | 113 |  |  | 76 |  |  | 75 |  |  | 488 |
Net (Charge-offs)/ Recoveries | (1,518 | ) |  | (2,613 | ) |  | 113 |  |  | (1,021 | ) |  | (295 | ) |  | (5,334 | )
Provision for loan losses | 5,306 |  |  | (1,375 | ) |  | (271 | ) |  | 868 |  |  | 341 |  |  | 4,869 |
Balance at End of Period | $ | 24,358 |  |  | $ | 9,256 |  |  | $ | 13,944 |  |  | $ | 5,803 |  |  | $ | 1,990 |  |  | $ | 55,351 |
| Three Months Ended June 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 | $ | 15,266 |  |  | $ | 14,740 |  |  | $ | 10,825 |  |  | $ | 8,261 |  |  | $ | 1,255 |  |  | $ | 50,347 |
Charge-offs | (1,662 | ) |  | (136 | ) |  | (945 | ) |  | (290 | ) |  | (463 | ) |  | (3,496 | )
Recoveries | 38 |  |  | 217 |  |  | 2 |  |  | 134 |  |  | 123 |  |  | 514 |
Net (Charge-offs)/ Recoveries | (1,624 | ) |  | 81 |  |  | (943 | ) |  | (156 | ) |  | (340 | ) |  | (2,982 | )
Provision for loan losses | 2,336 |  |  | (50 | ) |  | 1,819 |  |  | 313 |  |  | 430 |  |  | 4,848 |
Balance at End of Period | $ | 15,978 |  |  | $ | 14,771 |  |  | $ | 11,701 |  |  | $ | 8,418 |  |  | $ | 1,345 |  |  | $ | 52,213 |
| Six Months Ended June 30, 2017
(dollars in thousands) | Commercial Real Estate |  | Commercial and Industrial |  | Commercial Construction |  | Consumer Real Estate |  | Other Consumer |  | Total Loans
Balance at beginning of period | $ | 19,976 |  |  | $ | 10,810 |  |  | $ | 13,999 |  |  | $ | 6,095 |  |  | $ | 1,895 |  |  | $ | 52,775 |
Charge-offs | (2,063 | ) |  | (3,396 | ) |  | (644 | ) |  | (1,856 | ) |  | (804 | ) |  | (8,763 | )
Recoveries | 233 |  |  | 255 |  |  | 369 |  |  | 179 |  |  | 251 |  |  | 1,287 |
Net (Charge-offs)/Recoveries | (1,830 | ) |  | (3,141 | ) |  | (275 | ) |  | (1,677 | ) |  | (553 | ) |  | (7,476 | )
Provision for loan losses | 6,212 |  |  | 1,587 |  |  | 220 |  |  | 1,385 |  |  | 648 |  |  | 10,052 |
Balance at End of Period | $ | 24,358 |  |  | $ | 9,256 |  |  | $ | 13,944 |  |  | $ | 5,803 |  |  | $ | 1,990 |  |  | $ | 55,351 |
| Six Months Ended June 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 | (1,715 | ) |  | (2,830 | ) |  | (945 | ) |  | (522 | ) |  | (1,111 | ) |  | (7,123 | )
Recoveries | 398 |  |  | 420 |  |  | 3 |  |  | 298 |  |  | 207 |  |  | 1,326 |
Net (Charge-offs)/Recoveries | (1,317 | ) |  | (2,410 | ) |  | (942 | ) |  | (224 | ) |  | (904 | ) |  | (5,797 | )
Provision for loan losses | 2,252 |  |  | 6,328 |  |  | 18 |  |  | 242 |  |  | 1,023 |  |  | 9,863 |
Balance at End of Period | $ | 15,978 |  |  | $ | 14,771 |  |  | $ | 11,701 |  |  | $ | 8,418 |  |  | $ | 1,345 |  |  | $ | 52,213 |
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:
| June 30, 2017
| 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 | $ | — |  |  | $ | 24,358 |  |  | $ | 24,358 |  |  | $ | 6,472 |  |  | $ | 2,658,170 |  |  | $ | 2,664,642 |
Commercial and industrial | 340 |  |  | 8,916 |  |  | 9,256 |  |  | 18,568 |  |  | 1,382,715 |  |  | 1,401,283 |
Commercial construction | — |  |  | 13,944 |  |  | 13,944 |  |  | 4,257 |  |  | 422,497 |  |  | 426,754 |
Consumer real estate | 24 |  |  | 5,779 |  |  | 5,803 |  |  | 11,130 |  |  | 1,183,942 |  |  | 1,195,072 |
Other consumer | 25 |  |  | 1,965 |  |  | 1,990 |  |  | 35 |  |  | 70,033 |  |  | 70,068 |
Total | $ | 389 |  |  | $ | 54,962 |  |  | $ | 55,351 |  |  | $ | 40,462 |  |  | $ | 5,717,357 |  |  | $ | 5,757,819 |
| December 31, 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 | $ | — |  |  | $ | 19,976 |  |  | $ | 19,976 |  |  | $ | 16,352 |  |  | $ | 2,482,124 |  |  | $ | 2,498,476 |
Commercial and industrial | 771 |  |  | 10,039 |  |  | 10,810 |  |  | 6,866 |  |  | 1,394,169 |  |  | 1,401,035 |
Commercial construction | — |  |  | 13,999 |  |  | 13,999 |  |  | 6,613 |  |  | 449,271 |  |  | 455,884 |
Consumer real estate | 26 |  |  | 6,069 |  |  | 6,095 |  |  | 12,079 |  |  | 1,178,093 |  |  | 1,190,172 |
Other consumer | 1 |  |  | 1,894 |  |  | 1,895 |  |  | 25 |  |  | 65,827 |  |  | 65,852 |
Total | $ | 798 |  |  | $ | 51,977 |  |  | $ | 52,775 |  |  | $ | 41,935 |  |  | $ | 5,569,484 |  |  | $ | 5,611,419 |

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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=82894031&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=84173941&loc=SL6953659-111524 + Details
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- Definition Tabular disclosure of financing receivables that are past due but not impaired, financing receivables that are 90 days past due and still accruing, and financing receivables on nonaccrual status. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5111-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953401-111524 + Details
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