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Loans Receivable, Net (Tables) | 3 Months Ended
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Mar. 31, 2018
Receivables [Abstract] |
Summary of loans receivable | The following table presents loans receivable for each portfolio class of loans:
| At or for the Three Months ended |  | At or for the Year ended
(Dollars in thousands) | March 31, 2018 |  | December 31, 2017
Residential real estate loans | $ | 831,021 |  |  | 720,728 |
Commercial loans |  |  |
Real estate | 4,251,003 |  |  | 3,577,139 |
Other commercial | 1,839,293 |  |  | 1,579,353 |
Total | 6,090,296 |  |  | 5,156,492 |
Consumer and other loans |  |  |
Home equity | 489,879 |  |  | 457,918 |
Other consumer | 258,834 |  |  | 242,686 |
Total | 748,713 |  |  | 700,604 |
Loans receivable | 7,670,030 |  |  | 6,577,824 |
Allowance for loan and lease losses | (127,608 | ) |  | (129,568 | )
Loans receivable, net | $ | 7,542,422 |  |  | 6,448,256 |
Net deferred origination (fees) costs included in loans receivable | $ | (4,217 | ) |  | (2,643 | )
Net purchase accounting (discounts) premiums included in loans receivable | $ | (30,488 | ) |  | (16,325 | )
Weighted-average interest rate on loans (tax-equivalent) | 4.82 | % |  | 4.81 | %
Summary of the activity in the ALLL | The following tables summarize the activity in the ALLL by loan class:
| Three Months ended March 31, 2018
(Dollars in thousands) | Total |  | Residential Real Estate |  | Commercial Real Estate |  | Other Commercial |  | Home Equity |  | Other Consumer
Balance at beginning of period | $ | 129,568 |  |  | 10,798 |  |  | 68,515 |  |  | 39,303 |  |  | 6,204 |  |  | 4,748 |
Provision for loan losses | 795 |  |  | (177 | ) |  | 245 |  |  | (3 | ) |  | (202 | ) |  | 932 |
Charge-offs | (5,007 | ) |  | (3 | ) |  | (1,033 | ) |  | (1,788 | ) |  | (12 | ) |  | (2,171 | )
Recoveries | 2,252 |  |  | 16 |  |  | 615 |  |  | 596 |  |  | 50 |  |  | 975 |
Balance at end of period | $ | 127,608 |  |  | 10,634 |  |  | 68,342 |  |  | 38,108 |  |  | 6,040 |  |  | 4,484 |
| Three Months ended March 31, 2017
(Dollars in thousands) | Total |  | Residential Real Estate |  | Commercial Real Estate |  | Other Commercial |  | Home Equity |  | Other Consumer
Balance at beginning of period | $ | 129,572 |  |  | 12,436 |  |  | 65,773 |  |  | 37,823 |  |  | 7,572 |  |  | 5,968 |
Provision for loan losses | 1,598 |  |  | (926 | ) |  | (370 | ) |  | 1,621 |  |  | 129 |  |  | 1,144 |
Charge-offs | (4,229 | ) |  | (22 | ) |  | (888 | ) |  | (471 | ) |  | (96 | ) |  | (2,752 | )
Recoveries | 2,285 |  |  | 47 |  |  | 238 |  |  | 184 |  |  | 74 |  |  | 1,742 |
Balance at end of period | $ | 129,226 |  |  | 11,535 |  |  | 64,753 |  |  | 39,157 |  |  | 7,679 |  |  | 6,102 |
Summary of ALLL and loans receivable | The following tables disclose the recorded investment in loans and the balance in the ALLL by loan class:
| March 31, 2018
(Dollars in thousands) | Total |  | Residential Real Estate |  | Commercial Real Estate |  | Other Commercial |  | Home Equity |  | Other Consumer
Loans receivable |  |  |  |  |  |  |  |  |  |  |
Individually evaluated for impairment | $ | 138,544 |  |  | 13,257 |  |  | 93,496 |  |  | 25,518 |  |  | 3,326 |  |  | 2,947 |
Collectively evaluated for impairment | 7,531,486 |  |  | 817,764 |  |  | 4,157,507 |  |  | 1,813,775 |  |  | 486,553 |  |  | 255,887 |
Total loans receivable | $ | 7,670,030 |  |  | 831,021 |  |  | 4,251,003 |  |  | 1,839,293 |  |  | 489,879 |  |  | 258,834 |
ALLL |  |  |  |  |  |  |  |  |  |  |
Individually evaluated for impairment | $ | 4,468 |  |  | 167 |  |  | 798 |  |  | 3,042 |  |  | 27 |  |  | 434 |
Collectively evaluated for impairment | 123,140 |  |  | 10,467 |  |  | 67,544 |  |  | 35,066 |  |  | 6,013 |  |  | 4,050 |
Total ALLL | $ | 127,608 |  |  | 10,634 |  |  | 68,342 |  |  | 38,108 |  |  | 6,040 |  |  | 4,484 |
| December 31, 2017
(Dollars in thousands) | Total |  | Residential Real Estate |  | Commercial Real Estate |  | Other Commercial |  | Home Equity |  | Other Consumer
Loans receivable |  |  |  |  |  |  |  |  |  |  |
Individually evaluated for impairment | $ | 119,994 |  |  | 12,399 |  |  | 77,536 |  |  | 23,032 |  |  | 3,755 |  |  | 3,272 |
Collectively evaluated for impairment | 6,457,830 |  |  | 708,329 |  |  | 3,499,603 |  |  | 1,556,321 |  |  | 454,163 |  |  | 239,414 |
Total loans receivable | $ | 6,577,824 |  |  | 720,728 |  |  | 3,577,139 |  |  | 1,579,353 |  |  | 457,918 |  |  | 242,686 |
ALLL |  |  |  |  |  |  |  |  |  |  |
Individually evaluated for impairment | $ | 5,223 |  |  | 246 |  |  | 500 |  |  | 3,851 |  |  | 56 |  |  | 570 |
Collectively evaluated for impairment | 124,345 |  |  | 10,552 |  |  | 68,015 |  |  | 35,452 |  |  | 6,148 |  |  | 4,178 |
Total ALLL | $ | 129,568 |  |  | 10,798 |  |  | 68,515 |  |  | 39,303 |  |  | 6,204 |  |  | 4,748 |
Summary of impaired loans | The following tables disclose information related to impaired loans by loan class:
| At or for the Three Months ended March 31, 2018
(Dollars in thousands) | Total |  | Residential Real Estate |  | Commercial Real Estate |  | Other Commercial |  | Home Equity |  | Other Consumer
Loans with a specific valuation allowance |  |  |  |  |  |  |  |  |  |  |
Recorded balance | $ | 24,171 |  |  | 3,627 |  |  | 8,587 |  |  | 10,402 |  |  | 65 |  |  | 1,490 |
Unpaid principal balance | 24,874 |  |  | 3,698 |  |  | 8,787 |  |  | 10,404 |  |  | 79 |  |  | 1,906 |
Specific valuation allowance | 4,468 |  |  | 167 |  |  | 798 |  |  | 3,042 |  |  | 27 |  |  | 434 |
Average balance | 20,931 |  |  | 3,303 |  |  | 6,566 |  |  | 9,293 |  |  | 126 |  |  | 1,643 |
Loans without a specific valuation allowance |  |  |  |  |  |  |  |  |  |  |
Recorded balance | 114,373 |  |  | 9,630 |  |  | 84,909 |  |  | 15,116 |  |  | 3,261 |  |  | 1,457 |
Unpaid principal balance | 139,033 |  |  | 10,757 |  |  | 104,008 |  |  | 18,934 |  |  | 3,795 |  |  | 1,539 |
Average balance | 108,339 |  |  | 9,526 |  |  | 78,950 |  |  | 14,982 |  |  | 3,415 |  |  | 1,466 |
Total |  |  |  |  |  |  |  |  |  |  |
Recorded balance | 138,544 |  |  | 13,257 |  |  | 93,496 |  |  | 25,518 |  |  | 3,326 |  |  | 2,947 |
Unpaid principal balance | 163,907 |  |  | 14,455 |  |  | 112,795 |  |  | 29,338 |  |  | 3,874 |  |  | 3,445 |
Specific valuation allowance | 4,468 |  |  | 167 |  |  | 798 |  |  | 3,042 |  |  | 27 |  |  | 434 |
Average balance | 129,270 |  |  | 12,829 |  |  | 85,516 |  |  | 24,275 |  |  | 3,541 |  |  | 3,109 |
| At or for the Year ended December 31, 2017
(Dollars in thousands) | Total |  | Residential Real Estate |  | Commercial Real Estate |  | Other Commercial |  | Home Equity |  | Other Consumer
Loans with a specific valuation allowance |  |  |  |  |  |  |  |  |  |  |
Recorded balance | $ | 17,689 |  |  | 2,978 |  |  | 4,545 |  |  | 8,183 |  |  | 186 |  |  | 1,797 |
Unpaid principal balance | 18,400 |  |  | 3,046 |  |  | 4,573 |  |  | 8,378 |  |  | 199 |  |  | 2,204 |
Specific valuation allowance | 5,223 |  |  | 246 |  |  | 500 |  |  | 3,851 |  |  | 56 |  |  | 570 |
Average balance | 18,986 |  |  | 2,928 |  |  | 5,851 |  |  | 8,477 |  |  | 359 |  |  | 1,371 |
Loans without a specific valuation allowance |  |  |  |  |  |  |  |  |  |  |
Recorded balance | 102,305 |  |  | 9,421 |  |  | 72,991 |  |  | 14,849 |  |  | 3,569 |  |  | 1,475 |
Unpaid principal balance | 122,833 |  |  | 10,380 |  |  | 89,839 |  |  | 16,931 |  |  | 4,098 |  |  | 1,585 |
Average balance | 107,945 |  |  | 9,834 |  |  | 76,427 |  |  | 15,129 |  |  | 4,734 |  |  | 1,821 |
Total |  |  |  |  |  |  |  |  |  |  |
Recorded balance | 119,994 |  |  | 12,399 |  |  | 77,536 |  |  | 23,032 |  |  | 3,755 |  |  | 3,272 |
Unpaid principal balance | 141,233 |  |  | 13,426 |  |  | 94,412 |  |  | 25,309 |  |  | 4,297 |  |  | 3,789 |
Specific valuation allowance | 5,223 |  |  | 246 |  |  | 500 |  |  | 3,851 |  |  | 56 |  |  | 570 |
Average balance | 126,931 |  |  | 12,762 |  |  | 82,278 |  |  | 23,606 |  |  | 5,093 |  |  | 3,192 |
Loan portfolio aging analysis | The following tables present an aging analysis of the recorded investment in loans by loan class:
| March 31, 2018
(Dollars in thousands) | Total |  | Residential Real Estate |  | Commercial Real Estate |  | Other Commercial |  | Home Equity |  | Other Consumer
Accruing loans 30-59 days past due | $ | 34,506 |  |  | 7,812 |  |  | 14,016 |  |  | 8,676 |  |  | 2,197 |  |  | 1,805 |
Accruing loans 60-89 days past due | 10,457 |  |  | 593 |  |  | 5,694 |  |  | 3,660 |  |  | 43 |  |  | 467 |
Accruing loans 90 days or more past due | 5,402 |  |  | 430 |  |  | 2,379 |  |  | 2,322 |  |  | 111 |  |  | 160 |
Non-accrual loans | 54,449 |  |  | 7,188 |  |  | 34,344 |  |  | 9,509 |  |  | 2,804 |  |  | 604 |
Total past due and non-accrual loans | 104,814 |  |  | 16,023 |  |  | 56,433 |  |  | 24,167 |  |  | 5,155 |  |  | 3,036 |
Current loans receivable | 7,565,216 |  |  | 814,998 |  |  | 4,194,570 |  |  | 1,815,126 |  |  | 484,724 |  |  | 255,798 |
Total loans receivable | $ | 7,670,030 |  |  | 831,021 |  |  | 4,251,003 |  |  | 1,839,293 |  |  | 489,879 |  |  | 258,834 |
| December 31, 2017
(Dollars in thousands) | Total |  | Residential Real Estate |  | Commercial Real Estate |  | Other Commercial |  | Home Equity |  | Other Consumer
Accruing loans 30-59 days past due | $ | 26,375 |  |  | 6,252 |  |  | 12,546 |  |  | 3,634 |  |  | 2,142 |  |  | 1,801 |
Accruing loans 60-89 days past due | 11,312 |  |  | 794 |  |  | 5,367 |  |  | 3,502 |  |  | 987 |  |  | 662 |
Accruing loans 90 days or more past due | 6,077 |  |  | 2,366 |  |  | 609 |  |  | 2,973 |  |  | — |  |  | 129 |
Non-accrual loans | 44,833 |  |  | 4,924 |  |  | 27,331 |  |  | 8,298 |  |  | 3,338 |  |  | 942 |
Total past due and non-accrual loans | 88,597 |  |  | 14,336 |  |  | 45,853 |  |  | 18,407 |  |  | 6,467 |  |  | 3,534 |
Current loans receivable | 6,489,227 |  |  | 706,392 |  |  | 3,531,286 |  |  | 1,560,946 |  |  | 451,451 |  |  | 239,152 |
Total loans receivable | $ | 6,577,824 |  |  | 720,728 |  |  | 3,577,139 |  |  | 1,579,353 |  |  | 457,918 |  |  | 242,686 |
Summary of TDRs | The following tables present TDRs that occurred during the periods presented and the TDRs that occurred within the previous twelve months that subsequently defaulted during the periods presented:
| Three Months ended March 31, 2018
(Dollars in thousands) | Total |  | Residential Real Estate |  | Commercial Real Estate |  | Other Commercial |  | Home Equity |  | Other Consumer
TDRs that occurred during the period |  |  |  |  |  |  |  |  |  |  |
Number of loans | 12 |  |  | 2 |  |  | 4 |  |  | 6 |  |  | — |  |  | — |
Pre-modification recorded balance | $ | 15,997 |  |  | 439 |  |  | 8,278 |  |  | 7,280 |  |  | — |  |  | — |
Post-modification recorded balance | $ | 15,997 |  |  | 439 |  |  | 8,278 |  |  | 7,280 |  |  | — |  |  | — |
TDRs that subsequently defaulted |  |  |  |  |  |  |  |  |  |  |
Number of loans | 1 |  |  | 1 |  |  | — |  |  | — |  |  | — |  |  | — |
Recorded balance | $ | 334 |  |  | 334 |  |  | — |  |  | — |  |  | — |  |  | — |
| Three Months ended March 31, 2017
(Dollars in thousands) | Total |  | Residential Real Estate |  | Commercial Real Estate |  | Other Commercial |  | Home Equity |  | Other Consumer
TDRs that occurred during the period |  |  |  |  |  |  |  |  |  |  |
Number of loans | 10 |  |  | 2 |  |  | 2 |  |  | 4 |  |  | 1 |  |  | 1 |
Pre-modification recorded balance | $ | 9,555 |  |  | 280 |  |  | 582 |  |  | 8,530 |  |  | 153 |  |  | 10 |
Post-modification recorded balance | $ | 9,552 |  |  | 280 |  |  | 582 |  |  | 8,530 |  |  | 153 |  |  | 7 |
TDRs that subsequently defaulted |  |  |  |  |  |  |  |  |  |  |
Number of loans | 2 |  |  | — |  |  | — |  |  | 1 |  |  | — |  |  | 1 |
Recorded balance | $ | 25 |  |  | — |  |  | — |  |  | 18 |  |  | — |  |  | 7 |

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