XML 90 R31.htm IDEA: XBRL DOCUMENT
v3.20.1

Allowance for Credit Losses (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2020
Receivables [Abstract] |
Schedule of Loans Credit Quality Indicators | The following table presents loan balances by year of origination and performing and nonperforming status for our portfolio segments as of March 31, 2020:
(dollars in thousands) | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 and Prior | Revolving | Revolving-Term | Total
Commercial Real Estate |  |  |  |  |  |  |  |  |
Performing | $ | 169,367 |  | $ | 486,935 |  | $ | 453,673 |  | $ | 371,144 |  | $ | 431,919 |  | $ | 935,536 |  | $ | 59,882 |  | $ | — |  | $ | 2,908,456 |
Nonperforming | — |  | — |  | — |  | — |  | 19,791 |  | 23,713 |  | 3,008 |  | 21 |  | 46,533 |
Total Commercial Real Estate | 169,367 |  | 486,935 |  | 453,673 |  | 371,144 |  | 451,710 |  | 959,249 |  | 62,890 |  | 21 |  | 2,954,989 |
Commercial and Industrial |  |  |  |  |  |  |  |  |
Performing | 75,969 |  | 252,166 |  | 171,093 |  | 108,269 |  | 76,593 |  | 303,745 |  | 531,881 |  | — |  | 1,519,716 |
Nonperforming | — |  | — |  | 364 |  | — |  | 709 |  | 62 |  | 3,370 |  | — |  | 4,505 |
Total Commercial and Industrial | 75,969 |  | 252,166 |  | 171,457 |  | 108,269 |  | 77,302 |  | 303,807 |  | 535,251 |  | — |  | 1,524,221 |
Commercial Construction |  |  |  |  |  |  |  |  |
Performing | 23,004 |  | 179,956 |  | 117,527 |  | 18,055 |  | 18,986 |  | 20,020 |  | 12,083 |  | — |  | 389,631 |
Nonperforming | — |  | — |  | — |  | 108 |  | — |  | 463 |  | — |  | — |  | 571 |
Total Commercial Construction | 23,004 |  | 179,956 |  | 117,527 |  | 18,163 |  | 18,986 |  | 20,483 |  | 12,083 |  | — |  | 390,202 |
Business Banking |  |  |  |  |  |  |  |  |
Performing | 40,952 |  | 181,576 |  | 151,933 |  | 107,176 |  | 94,230 |  | 355,259 |  | 128,022 |  | — |  | 1,059,148 |
Nonperforming | — |  | 110 |  | 1,093 |  | 1,272 |  | 882 |  | 7,779 |  | 180 |  | — |  | 11,316 |
Total Business Banking | 40,952 |  | 181,686 |  | 153,026 |  | 108,448 |  | 95,112 |  | 363,038 |  | 128,202 |  | — |  | 1,070,464 |
Consumer Real Estate |  |  |  |  |  |  |  |  |
Performing | 33,737 |  | 149,942 |  | 86,401 |  | 83,526 |  | 90,151 |  | 318,926 |  | 432,403 |  | 21,367 |  | 1,216,453 |
Nonperforming | — |  | 190 |  | 133 |  | 413 |  | 3,763 |  | 4,957 |  | 176 |  | 984 |  | 10,616 |
Total Consumer Real Estate | 33,737 |  | 150,132 |  | 86,534 |  | 83,939 |  | 93,914 |  | 323,883 |  | 432,579 |  | 22,351 |  | 1,227,069 |
Other Consumer |  |  |  |  |  |  |  |  |
Performing | 8,706 |  | 10,010 |  | 10,802 |  | 6,606 |  | 5,682 |  | 7,359 |  | 28,478 |  | 1,899 |  | 79,542 |
Nonperforming | — |  | — |  | — |  | — |  | — |  | 258 |  | — |  | — |  | 258 |
Total Other Consumer | 8,706 |  | 10,010 |  | 10,802 |  | 6,606 |  | 5,682 |  | 7,617 |  | 28,478 |  | 1,899 |  | 79,800 |
Performing | 351,735 |  | 1,260,585 |  | 991,429 |  | 694,776 |  | 717,561 |  | 1,940,845 |  | 1,192,749 |  | 23,266 |  | 7,172,946 |
Nonperforming | — |  | 300 |  | 1,590 |  | 1,793 |  | 25,145 |  | 37,232 |  | 6,734 |  | 1,005 |  | 73,799 |
Total Loan Balance | $ | 351,735 |  | $ | 1,260,885 |  | $ | 993,019 |  | $ | 696,569 |  | $ | 742,706 |  | $ | 1,978,077 |  | $ | 1,199,483 |  | $ | 24,271 |  | $ | 7,246,745 |
The following table presents collateral-dependent loans by class of loan:
| March 31, 2020
| Type of Collateral
(dollars in thousands) | Real Estate |  | Blanket Lien |  | Investment/Cash |  | Other
Commercial real estate |  | $51,630 |  |  |  | $— |  |  |  | $— |  |  |  | $— |
Commercial and industrial | 4,686 |  |  | 4,545 |  |  | 40 |  |  | — |
Commercial construction | 3,602 |  |  | — |  |  | — |  |  | — |
Business banking | 2,322 |  |  | 876 |  |  | — |  |  | 689 |
Consumer real estate | — |  |  | — |  |  | — |  |  | — |
Other consumer | 398 |  |  | — |  |  | — |  |  | — |
Total |  | $62,638 |  |  |  | $5,421 |  |  |  | $40 |  |  |  | $689 |
The following table presents the recorded investment in commercial loan classes by internally assigned risk ratings as of December 31, 2019:
| December 31, 2019
(dollars in thousands) | Commercial Real Estate | % of Total |  | Commercial and Industrial | % of Total |  | Commercial Construction | % of Total |  | Total | % of Total
Pass | $ | 3,270,437 |  | 95.7 | % |  | $ | 1,636,314 |  | 93.4 | % |  | $ | 347,324 |  | 92.5 | % |  | $ | 5,254,076 |  | 95.3 | %
Special mention | 57,285 |  | 1.7 | % |  | 36,484 |  | 1.7 | % |  | 10,109 |  | 2.7 | % |  | 103,878 |  | 1.9 | %
Substandard | 86,772 |  | 2.5 | % |  | 47,980 |  | 4.9 | % |  | 17,899 |  | 4.8 | % |  | 152,651 |  | 2.8 | %
Doubtful | 2,023 |  | — | % |  | 55 |  | — | % |  | 133 |  | — | % |  | 2,191 |  | — | %
Total | $ | 3,416,518 |  | 100.0 | % |  | $ | 1,720,833 |  | 100.0 | % |  | $ | 375,445 |  | 100.0 | % |  | $ | 5,512,796 |  | 100.0 | %
The following table presents loan balances by year of origination and internally assigned risk rating for our portfolio segments as of March 31, 2020:
| Risk Rating
(dollars in thousands) | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 and Prior | Revolving | Revolving-Term | Total
Commercial Real Estate |  |  |  |  |  |  |  |  |
Pass | $ | 169,367 |  | $ | 483,699 |  | $ | 452,024 |  | $ | 359,553 |  | $ | 416,420 |  | $ | 882,326 |  | $ | 59,032 |  | — |  | $ | 2,822,421 |
Special Mention | — |  | 3,236 |  | 187 |  | 11,591 |  | 10,005 |  | 26,575 |  | 850 |  | — |  | 52,444 |
Substandard | — |  | — |  | 1,462 |  | — |  | 25,285 |  | 50,348 |  | 3,008 |  | 21 |  | 80,124 |
Total Commercial Real Estate | 169,367 |  | 486,935 |  | 453,673 |  | 371,144 |  | 451,710 |  | 959,249 |  | 62,890 |  | 21 |  | 2,954,989 |
Commercial and Industrial |  |  |  |  |  |  |  |  |
Pass | 75,969 |  | 240,261 |  | 165,631 |  | 103,537 |  | 73,798 |  | 282,138 |  | 486,045 |  | — |  | 1,427,379 |
Special Mention | — |  | 6,239 |  | 3,525 |  | 947 |  | 1,883 |  | 9,437 |  | 31,890 |  | — |  | 53,921 |
Substandard | — |  | 5,666 |  | 2,301 |  | 3,785 |  | 1,621 |  | 12,232 |  | 17,316 |  | — |  | 42,921 |
Total Commercial and Industrial | 75,969 |  | 252,166 |  | 171,457 |  | 108,269 |  | 77,302 |  | 303,807 |  | 535,251 |  | — |  | 1,524,221 |
Commercial Construction |  |  |  |  |  |  |  |  |
Pass | 23,004 |  | 179,956 |  | 117,527 |  | 17,122 |  | 18,986 |  | 11,586 |  | 11,992 |  | — |  | 380,173 |
Special Mention | — |  | — |  | — |  | — |  | — |  | 5,117 |  | 91 |  | — |  | 5,208 |
Substandard | — |  | — |  | — |  | 1,041 |  | — |  | 3,780 |  | — |  | — |  | 4,821 |
Total Commercial Construction | 23,004 |  | 179,956 |  | 117,527 |  | 18,163 |  | 18,986 |  | 20,483 |  | 12,083 |  | — |  | 390,202 |
Business Banking |  |  |  |  |  |  |  |  |
Pass | 40,952 |  | 181,242 |  | 148,419 |  | 103,027 |  | 89,925 |  | 327,333 |  | 125,800 |  | — |  | 1,016,698 |
Special Mention | — |  | 62 |  | 1,496 |  | 1,775 |  | 1,181 |  | 7,902 |  | 737 |  | — |  | 13,153 |
Substandard | — |  | 382 |  | 3,111 |  | 3,646 |  | 4,006 |  | 27,803 |  | 1,665 |  | — |  | 40,613 |
Total Business Banking | 40,952 |  | 181,686 |  | 153,026 |  | 108,448 |  | 95,112 |  | 363,038 |  | 128,202 |  | — |  | 1,070,464 |
Consumer Real Estate |  |  |  |  |  |  |  |  |
Pass | 33,737 |  | 149,942 |  | 86,463 |  | 83,402 |  | 92,013 |  | 316,169 |  | 432,274 |  | 20,966 |  | 1,214,966 |
Special Mention | — |  | — |  | — |  | — |  | 798 |  | 304 |  | — |  | — |  | 1,102 |
Substandard | — |  | 190 |  | 71 |  | 537 |  | 1,103 |  | 7,410 |  | 305 |  | 1,385 |  | 11,001 |
Total Consumer Real Estate | 33,737 |  | 150,132 |  | 86,534 |  | 83,939 |  | 93,914 |  | 323,883 |  | 432,579 |  | 22,351 |  | 1,227,069 |
Other consumer |  |  |  |  |  |  |  |  |
Pass | 8,706 |  | 9,522 |  | 10,670 |  | 6,474 |  | 5,088 |  | 3,365 |  | 28,156 |  | 773 |  | 72,754 |
Special Mention | — |  | — |  | — |  | — |  | — |  | — |  | — |  | — |  | — |
Substandard | — |  | 488 |  | 132 |  | 132 |  | 594 |  | 4,252 |  | 322 |  | 1,126 |  | 7,046 |
Total Other Consumer | 8,706 |  | 10,010 |  | 10,802 |  | 6,606 |  | 5,682 |  | 7,617 |  | 28,478 |  | 1,899 |  | 79,800 |
Total Loan Balance | $ | 351,735 |  | $ | 1,260,885 |  | $ | 993,019 |  | $ | 696,569 |  | $ | 742,706 |  | $ | 1,978,077 |  | $ | 1,199,483 |  | $ | 24,271 |  | $ | 7,246,745 |
Schedule of 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:
| March 31, 2020
(dollars in thousands) | Current |  |  | 30-59 Days Past Due |  |  | 60-89 Days Past Due |  |  | 90 Days Past Due(1) |  |  | Non - performing |  |  | Total Past Due Loans |  |  | Total Loans |
Commercial real estate | $ | 2,901,375 |  |  | $ | 6,381 |  |  | $ | — |  |  | $ | 700 |  |  | $ | 46,533 |  |  | $ | 53,614 |  |  | $ | 2,954,989 |
Commercial and industrial | 1,516,639 |  |  | 463 |  |  | — |  |  | 2,615 |  |  | 4,505 |  |  | 7,582 |  |  | 1,524,221 |
Commercial construction | 388,122 |  |  | 576 |  |  | — |  |  | 933 |  |  | 571 |  |  | 2,080 |  |  | 390,202 |
Business banking | 1,048,241 |  |  | 6,758 |  |  | 3,381 |  |  | 768 |  |  | 11,316 |  |  | 22,223 |  |  | 1,070,464 |
Consumer real estate | 1,211,865 |  |  | 3,859 |  |  | 646 |  |  | 83 |  |  | 10,616 |  |  | 15,203 |  |  | 1,227,069 |
Other consumer | 79,083 |  |  | 174 |  |  | 91 |  |  | 195 |  |  | 258 |  |  | 717 |  |  | 79,800 |
Total | $ | 7,145,326 |  |  | $ | 18,211 |  |  | $ | 4,117 |  |  | $ | 5,294 |  |  | $ | 73,799 |  |  | $ | 101,419 |  |  | $ | 7,246,745 |
(1) Refer to Note 1, Basis of Presentation for details of reclassification of our portfolio segments related to the adoption of ASU 2016-13 Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instrument.
| December 31, 2019
(dollars in thousands) | Current |  |  | 30-59 Days Past Due |  |  | 60-89 Days Past Due |  |  | 90 Days Past Due(1) |  |  | Non - performing |  |  | Total Past Due Loans |  |  | Total Loans |
Commercial real estate | $ | 3,025,505 |  |  | $ | 7,749 |  |  | $ | 71 |  |  | $ | 911 |  |  | $ | 25,356 |  |  | $ | 34,087 |  |  | $ | 3,059,592 |
Commercial and industrial | 1,466,460 |  |  | 126 |  |  | 1,589 |  |  | 1,443 |  |  | 10,911 |  |  | 14,069 |  |  | 1,480,529 |
Commercial construction | 367,204 |  |  | 956 |  |  | 1,163 |  |  | — |  |  | 737 |  |  | 2,856 |  |  | 370,060 |
Business banking | 830,735 |  |  | 5,093 |  |  | 1,099 |  |  | — |  |  | 9,863 |  |  | 16,055 |  |  | 846,790 |
Consumer real estate | 1,283,591 |  |  | 2,620 |  |  | 1,758 |  |  | 1,175 |  |  | 6,063 |  |  | 11,616 |  |  | 1,295,207 |
Other consumer | 81,866 |  |  | 1,448 |  |  | 305 |  |  | 228 |  |  | 1,127 |  |  | 3,108 |  |  | 84,974 |
Total | $ | 7,055,361 |  |  | $ | 17,992 |  |  | $ | 5,985 |  |  | $ | 3,757 |  |  | $ | 54,057 |  |  | $ | 81,791 |  |  | $ | 7,137,152 |
(1)Represents acquired loans that were recorded at fair value at the acquisition date and remain performing at March 31, 2020 and December 31, 2019.
Schedule of Loans on Nonaccrual Status and Loans Past Due 90 days Or More | The following table is a summary of nonperforming assets as of the dates presented:
| Nonperforming Assets
(dollars in thousands) | March 31, 2020 |  |  | December 31, 2019 |
Nonperforming Assets |  |  |  |  |
Nonaccrual loans |  | $ | 37,744 |  |  |  | $ | 45,145 |
Nonaccrual TDRs |  | 36,055 |  |  |  | 8,912 |
Total Nonaccrual Loans |  | 73,799 |  |  |  | 54,057 |
OREO |  | 3,389 |  |  |  | 3,525 |
Total Nonperforming Assets |  | $ | 77,188 |  |  |  | $ | 57,582 |
The following table presents loans on nonaccrual status and loans past due 90 days or more and still accruing by class of loan:
| As or for the Three Months Ended March 31, 2020
(dollars in thousands) | Beginning of Period Nonaccrual |  | End of Period Nonaccrual |  | Nonaccrual With No Related Allowance |  | Past Due 90+ Days Still Accruing |  | Interest Income Recognized on Nonaccrual
Commercial real estate |  | $25,356 |  |  | $ | 46,533 |  |  |  | $39,454 |  |  | $ | 700 |  |  |  | $684 |
Commercial and industrial | 10,911 |  |  | 4,505 |  |  | 4,054 |  |  | 2,615 |  |  | 64 |
Commercial construction | 737 |  |  | 571 |  |  | 285 |  |  | 933 |  |  | — |
Business banking | 9,863 |  |  | 11,316 |  |  | 2,363 |  |  | 768 |  |  | 58 |
Consumer real estate | 6,063 |  |  | 10,616 |  |  | 398 |  |  | 83 |  |  | 47 |
Other consumer | 1,127 |  |  | 258 |  |  | — |  |  | 195 |  |  | 28 |
Total |  | $54,057 |  |  |  | $73,799 |  |  |  | $46,554 |  |  | $ | 5,294 |  |  |  | $881 |
Schedule of Allowance for Credit Loss | The following table presents activity in the ACL for the three months ended March 31, 2020:
| Three Months Ended March 31, 2020
(dollars in thousands) | Commercial Real Estate |  | Commercial and Industrial |  | Commercial Construction |  | Business Banking(1) |  | Consumer Real Estate |  | Other Consumer |  | Total Loans
Allowance for credit losses on loans: |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of period | $ | 30,577 |  |  | $ | 15,681 |  |  | $ | 7,900 |  |  | $ | — |  |  | $ | 6,337 |  |  | $ | 1,729 |  |  | $ | 62,224 |
Impact of CECL adoption | 4,810 |  |  | 7,853 |  |  | (3,376 | ) |  | 12,898 |  |  | 4,525 |  |  | 642 |  |  | 27,352 |
Provision for credit losses on loans | 7,639 |  |  | 6,196 |  |  | 2,309 |  |  | 1,194 |  |  | 472 |  |  | 620 |  |  | 18,430 |
Charge-offs | (442 | ) |  | (9,879 | ) |  | (229 | ) |  | (460 | ) |  | (172 | ) |  | (248 | ) |  | (11,430 | )
Recoveries | 27 |  |  | 19 |  |  | 2 |  |  | 74 |  |  | 38 |  |  | 114 |  |  | 274 |
Net (Charge-offs)/Recoveries | (415 | ) |  | (9,860 | ) |  | (227 | ) |  | (386 | ) |  | (134 | ) |  | (134 | ) |  | (11,156 | )
Balance at End of Period | $ | 42,611 |  |  | $ | 19,870 |  |  | $ | 6,606 |  |  | $ | 13,706 |  |  | $ | 11,200 |  |  | $ | 2,857 |  |  | $ | 96,850 |
(1) In connection with our adoption of ASU 2016-13, we made changes to our loan portfolio segments to align with the methodology applied in determining the allowance under CECL. Our new segmentation breaks out business banking loans from our other loan segments: CRE, C&I , commercial construction, consumer real estate and other consumer. The business banking allowance balance at the beginning of period is included in the other segments and reclassified to business banking through the impact of CECL adoption line.
Schedule of Recorded Investment in Consumer Loan Classes by Performing and Nonperforming Status | The following table presents the recorded investment in consumer loan classes by performing and nonperforming status as of December 31, 2019:
| December 31, 2019
(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 | $ | 991,066 |  | 99.2 | % |  | $ | 535,709 |  | 99.5 | % |  | $ | 78,993 |  | 99.9 | % |  | $ | 8,390 |  | 100.0 | % |  | $ | 1,614,158 |  | 99.4 | %
Nonperforming | 7,519 |  | 0.8 | % |  | 2,639 |  | 0.5 | % |  | 40 |  | 0.1 | % |  | — |  | — | % |  | 10,198 |  | 0.6 | %
Total | $ | 998,585 |  | 100.0 | % |  | $ | 538,348 |  | 100.0 | % |  | $ | 79,033 |  | 100.0 | % |  | $ | 8,390 |  | 100.0 | % |  | $ | 1,624,356 |  | 100.0 | %
Schedule of Investments in Loans Considered to be Impaired and Related Information on Impaired Loans | The following table presents average recorded investment and interest income recognized on impaired loans for the three months ended March 31, 2019:
| Three months ended
| March 31, 2019
(dollars in thousands) | Average Recorded Investment |  | Interest Income Recognized
With a related allowance recorded: |  |  |
Commercial real estate | $ | 15,107 |  |  | $ | 144 |
Commercial and industrial | 12,780 |  |  | 209 |
Commercial construction | 2,319 |  |  | 140 |
Consumer real estate | 8,846 |  |  | 417 |
Other consumer | 4 |  |  | — |
Total with a Related Allowance Recorded | 39,056 |  |  | 910 |
Without a related allowance recorded: |  |  |
Commercial real estate | 12,983 |  |  | 400 |
Commercial and industrial | 980 |  |  | 35 |
Commercial construction | 489 |  |  | — |
Consumer real estate | 14 |  |  | 1 |
Other consumer | 10 |  |  | 1 |
Total without a Related Allowance Recorded | 14,476 |  |  | 437 |
Total: |  |  |
Commercial real estate | 28,090 |  |  | 544 |
Commercial and industrial | 13,760 |  |  | 244 |
Commercial construction | 2,808 |  |  | 140 |
Consumer real estate | 8,860 |  |  | 418 |
Other consumer | 14 |  |  | 1 |
Total | $ | 53,532 |  |  | $ | 1,347 |
The following table presents investments in loans considered to be impaired and related information on those impaired loans as of December 31, 2019:
| December 31, 2019
(dollars in thousands) | Recorded Investment |  | Unpaid Principal Balance |  | Related Allowance
With a related allowance recorded: |  |  |  |  |
Commercial real estate | $ | 13,011 |  |  | $ | 14,322 |  |  | $ | 2,023 |
Commercial and industrial | 10,001 |  |  | 10,001 |  |  | 55 |
Commercial construction | 489 |  |  | 489 |  |  | 113 |
Consumer real estate | — |  |  | — |  |  | — |
Other consumer | 9 |  |  | 9 |  |  | 9 |
Total with a Related Allowance Recorded | 23,510 |  |  | 24,821 |  |  | 2,200 |
Without a related allowance recorded: |  |  |  |  |
Commercial real estate | 34,909 |  |  | 40,201 |  |  | — |
Commercial and industrial | 7,605 |  |  | 10,358 |  |  | — |
Commercial construction | 1,425 |  |  | 2,935 |  |  | — |
Consumer real estate | 7,884 |  |  | 8,445 |  |  | — |
Other consumer | 4 |  |  | 11 |  |  | — |
Total without a Related Allowance Recorded | 51,827 |  |  | 61,950 |  |  | — |
Total: |  |  |  |  |
Commercial real estate | 47,920 |  |  | 54,523 |  |  | 2,023 |
Commercial and industrial | 17,606 |  |  | 20,359 |  |  | 55 |
Commercial construction | 1,914 |  |  | 3,424 |  |  | 113 |
Consumer real estate | 7,884 |  |  | 8,445 |  |  | — |
Other consumer | 13 |  |  | 20 |  |  | 9 |
Total | $ | 75,337 |  |  | $ | 86,771 |  |  | $ | 2,200 |
Schedule of Summary of Allowance for Loan Losses |
|  |  | Three Months Ended March 31, 2019
(dollars in thousands) |  |  | Commercial Real Estate |  | Commercial and Industrial |  | Commercial Construction |  | Consumer Real Estate |  | Other Consumer |  | Total Loans
Balance at beginning of period |  |  | $ | 33,707 |  |  | $ | 11,596 |  |  | $ | 7,983 |  |  | $ | 6,187 |  |  | $ | 1,494 |  |  | $ | 6,996 |
Charge-offs |  |  | (1 | ) |  | (5,477 | ) |  | — |  |  | (162 | ) |  | (425 | ) |  | (6,023 | )
Recoveries |  |  | 122 |  |  | 417 |  |  | — |  |  | 148 |  |  | 169 |  |  | 787 |
Net (Charge-offs)/Recoveries |  |  | 121 |  |  | (5,060 | ) |  | — |  |  | (14 | ) |  | (256 | ) |  | (5,236 | )
Provision for credit losses |  |  | 1,075 |  |  | 5,460 |  |  | (1,226 | ) |  | 5 |  |  | 249 |  |  | 5,649 |
Balance at End of Period |  |  | $ | 34,903 |  |  | $ | 11,996 |  |  | $ | 6,757 |  |  | $ | 6,178 |  |  | $ | 1,487 |  |  | $ | 61,409 |
Schedule of Summary of Allowance for Loan Losses and Recorded Investments | The following tables present the allowance for loan losses and recorded investments in loans by category as of December 31,2019:
| December 31, 2019
| 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 | $ | 2,023 |  |  | $ | 28,554 |  |  | $ | 30,577 |  |  | $ | 47,920 |  |  | $ | 3,368,598 |  |  | $ | 3,416,518 |
Commercial and industrial | 55 |  |  | 15,626 |  |  | 15,681 |  |  | 17,606 |  |  | 1,703,227 |  |  | 1,720,833 |
Commercial construction | 113 |  |  | 7,787 |  |  | 7,900 |  |  | 1,914 |  |  | 373,531 |  |  | 375,445 |
Consumer real estate | — |  |  | 6,337 |  |  | 6,337 |  |  | 7,884 |  |  | 1,537,439 |  |  | 1,545,323 |
Other consumer | 9 |  |  | 1,720 |  |  | 1,729 |  |  | 13 |  |  | 79,020 |  |  | 79,033 |
Total | $ | 2,200 |  |  | $ | 60,024 |  |  | $ | 62,224 |  |  | $ | 75,337 |  |  | $ | 7,061,815 |  |  | $ | 7,137,152 |

X
- Definition Allowance for loan losses and portfolio loans. + References No definition available. + Details
Name: | stba_AllowanceForLoanLossesAndPortfolioLoansTableTextBlock
Namespace Prefix: | stba_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Schedule of change in fair value of commercial consumer loans. + References No definition available. + Details
Name: | stba_ScheduleOfChangeInFairValueOfCommercialConsumerLoansTableTextBlock
Namespace Prefix: | stba_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Schedule of performing non performing loans by category. + References No definition available. + Details
Name: | stba_ScheduleOfPerformingNonPerformingLoansByCategoryTableTextBlock
Namespace Prefix: | stba_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of allowance for credit loss on financing receivable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919249-210447 + Details
Name: | us-gaap_AllowanceForCreditLossesOnFinancingReceivablesTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- 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/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919230-210447 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 29 -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953659-111524 + Details
Name: | us-gaap_FinancingReceivableCreditQualityIndicatorsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of impaired financing receivables. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5212-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivablesTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of aging analysis for financing receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919253-210447 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953401-111524 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 80 -URI http://asc.fasb.org/extlink&oid=118955255&loc=SL82922355-210448 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5111-111524 + Details
Name: | us-gaap_PastDueFinancingReceivablesTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_ReceivablesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of financing receivable on nonaccrual status. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5111-111524 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919258-210447 + Details
Name: | us-gaap_ScheduleOfFinancingReceivablesNonAccrualStatusTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration