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Allowance for Loan and Lease Losses Allowance for Loan and Lease Losses (Tables) | 12 Months Ended
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Dec. 31, 2017
Receivables [Abstract] |
Allocation of Allowance for Loan and Lease Losses [Table Text Block] | Activity in the allowance for loan and lease losses is as follows:
| Non-PCI |  | PCI |  | Total
(Dollars in thousands) |  |  |  |  |
Balance at January 1, 2015 | $ | 182,837 |  |  | $ | 21,629 |  |  | $ | 204,466 |
Provision (credit) for loan and lease losses | 22,937 |  |  | (2,273 | ) |  | 20,664 |
Loans and leases charged-off | (25,304 | ) |  | (3,044 | ) |  | (28,348 | )
Loans and leases recovered | 9,434 |  |  | — |  |  | 9,434 |
Net charge-offs | (15,870 | ) |  | (3,044 | ) |  | (18,914 | )
Balance at December 31, 2015 | 189,904 |  |  | 16,312 |  |  | 206,216 |
Provision (credit) for loan and lease losses | 34,870 |  |  | (1,929 | ) |  | 32,941 |
Loans and leases charged-off | (29,587 | ) |  | (614 | ) |  | (30,201 | )
Loans and leases recovered | 9,839 |  |  | — |  |  | 9,839 |
Net charge-offs | (19,748 | ) |  | (614 | ) |  | (20,362 | )
Balance at December 31, 2016 | 205,026 |  |  | 13,769 |  |  | 218,795 |
Provision (credit) for loan and lease losses | 29,139 |  |  | (3,447 | ) |  | 25,692 |
Loans and leases charged-off | (36,386 | ) |  | (296 | ) |  | (36,682 | )
Loans and leases recovered | 14,088 |  |  | — |  |  | 14,088 |
Net charge-offs | (22,298 | ) |  | (296 | ) |  | (22,594 | )
Balance at December 31, 2017 | $ | 211,867 |  |  | $ | 10,026 |  |  | $ | 221,893 |
Activity in the allowance for loan and lease losses, ending balances of loans and leases and related allowance by class of loans is summarized as follows:
| Years ended December 31, 2017, 2016 and 2015
(Dollars in thousands) | Construction and land development - commercial |  | Commercial mortgage |  | Other commercial real estate |  | Commercial and industrial |  | Lease financing |  | Other |  | Residential mortgage |  | Revolving mortgage |  | Construction and land development - non- commercial |  | Consumer |  | Total
Non-PCI Loans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for loan and lease losses: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at January 1, 2015 | $ | 11,961 |  |  | $ | 85,189 |  |  | $ | 732 |  |  | $ | 30,727 |  |  | $ | 4,286 |  |  | $ | 3,184 |  |  | $ | 10,661 |  |  | $ | 18,650 |  |  | $ | 892 |  |  | $ | 16,555 |  |  | $ | 182,837 |
Provision (credits) | 4,773 |  |  | (15,822 | ) |  | 1,569 |  |  | 17,432 |  |  | 1,602 |  |  | (1,420 | ) |  | 4,202 |  |  | (927 | ) |  | 541 |  |  | 10,987 |  |  | 22,937 |
Charge-offs | (1,012 | ) |  | (1,498 | ) |  | (178 | ) |  | (5,952 | ) |  | (402 | ) |  | — |  |  | (1,619 | ) |  | (2,925 | ) |  | (22 | ) |  | (11,696 | ) |  | (25,304 | )
Recoveries | 566 |  |  | 2,027 |  |  | 45 |  |  | 909 |  |  | 38 |  |  | 91 |  |  | 861 |  |  | 1,173 |  |  | 74 |  |  | 3,650 |  |  | 9,434 |
Balance at December 31, 2015 | 16,288 |  |  | 69,896 |  |  | 2,168 |  |  | 43,116 |  |  | 5,524 |  |  | 1,855 |  |  | 14,105 |  |  | 15,971 |  |  | 1,485 |  |  | 19,496 |  |  | 189,904 |
Provision (credits) | 12,871 |  |  | (21,912 | ) |  | 925 |  |  | 14,583 |  |  | 635 |  |  | 877 |  |  | 801 |  |  | 7,413 |  |  | 45 |  |  | 18,632 |  |  | 34,870 |
Charge-offs | (680 | ) |  | (987 | ) |  | — |  |  | (9,013 | ) |  | (442 | ) |  | (144 | ) |  | (926 | ) |  | (3,287 | ) |  | — |  |  | (14,108 | ) |  | (29,587 | )
Recoveries | 398 |  |  | 1,281 |  |  | 176 |  |  | 1,539 |  |  | 190 |  |  | 539 |  |  | 467 |  |  | 916 |  |  | 66 |  |  | 4,267 |  |  | 9,839 |
Balance at December 31, 2016 | 28,877 |  |  | 48,278 |  |  | 3,269 |  |  | 50,225 |  |  | 5,907 |  |  | 3,127 |  |  | 14,447 |  |  | 21,013 |  |  | 1,596 |  |  | 28,287 |  |  | 205,026 |
Provision (credits) | (4,329 | ) |  | (5,694 | ) |  | 1,280 |  |  | 10,658 |  |  | 966 |  |  | 2,189 |  |  | 2,096 |  |  | 2,509 |  |  | 2,366 |  |  | 17,098 |  |  | 29,139 |
Charge-offs | (599 | ) |  | (421 | ) |  | (5 | ) |  | (10,926 | ) |  | (995 | ) |  | (912 | ) |  | (1,376 | ) |  | (2,368 | ) |  | — |  |  | (18,784 | ) |  | (36,386 | )
Recoveries | 521 |  |  | 2,842 |  |  | 27 |  |  | 3,740 |  |  | 249 |  |  | 285 |  |  | 539 |  |  | 1,282 |  |  | — |  |  | 4,603 |  |  | 14,088 |
Balance at December 31, 2017 | $ | 24,470 |  |  | $ | 45,005 |  |  | $ | 4,571 |  |  | $ | 53,697 |  |  | $ | 6,127 |  |  | $ | 4,689 |  |  | $ | 15,706 |  |  | $ | 22,436 |  |  | $ | 3,962 |  |  | $ | 31,204 |  |  | $ | 211,867 |
| December 31, 2017
(Dollars in thousands) | Construction and land development - commercial |  | Commercial mortgage |  | Other commercial real estate |  | Commercial and industrial |  | Lease financing |  | Other |  | Residential mortgage |  | Revolving mortgage |  | Construction and land development - non-commercial |  | Consumer |  | Total
Non-PCI Loans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for loan and lease losses: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
ALLL for loans and leases individually evaluated for impairment | $ | 185 |  |  | $ | 3,648 |  |  | $ | 209 |  |  | $ | 665 |  |  | $ | 397 |  |  | $ | — |  |  | $ | 2,733 |  |  | $ | 1,085 |  |  | $ | 68 |  |  | $ | 738 |  |  | $ | 9,728 |
ALLL for loans and leases collectively evaluated for impairment | 24,285 |  |  | 41,357 |  |  | 4,362 |  |  | 53,032 |  |  | 5,730 |  |  | 4,689 |  |  | 12,973 |  |  | 21,351 |  |  | 3,894 |  |  | 30,466 |  |  | 202,139 |
Total allowance for loan and lease losses | $ | 24,470 |  |  | $ | 45,005 |  |  | $ | 4,571 |  |  | $ | 53,697 |  |  | $ | 6,127 |  |  | $ | 4,689 |  |  | $ | 15,706 |  |  | $ | 22,436 |  |  | $ | 3,962 |  |  | $ | 31,204 |  |  | $ | 211,867 |
Loans and leases: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans and leases individually evaluated for impairment | $ | 788 |  |  | $ | 73,655 |  |  | $ | 1,857 |  |  | $ | 7,974 |  |  | $ | 1,914 |  |  | $ | 521 |  |  | $ | 37,842 |  |  | $ | 23,770 |  |  | $ | 4,551 |  |  | $ | 2,774 |  |  | $ | 155,646 |
Loans and leases collectively evaluated for impairment | 668,427 |  |  | 9,655,367 |  |  | 471,576 |  |  | 2,722,433 |  |  | 892,887 |  |  | 301,655 |  |  | 3,485,944 |  |  | 2,677,755 |  |  | 243,738 |  |  | 1,558,399 |  |  | 22,678,181 |
Total loan and leases | $ | 669,215 |  |  | $ | 9,729,022 |  |  | $ | 473,433 |  |  | $ | 2,730,407 |  |  | $ | 894,801 |  |  | $ | 302,176 |  |  | $ | 3,523,786 |  |  | $ | 2,701,525 |  |  | $ | 248,289 |  |  | $ | 1,561,173 |  |  | $ | 22,833,827 |
| December 31, 2016
(Dollars in thousands) | Construction and land development - commercial |  | Commercial mortgage |  | Other commercial real estate |  | Commercial and industrial |  | Lease financing |  | Other |  | Residential mortgage |  | Revolving mortgage |  | Construction and land development - non-commercial |  | Consumer |  | Total
Non-PCI Loans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for loan and lease losses: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
ALLL for loans and leases individually evaluated for impairment | $ | 151 |  |  | $ | 3,488 |  |  | $ | 152 |  |  | $ | 1,732 |  |  | $ | 75 |  |  | $ | 23 |  |  | $ | 2,447 |  |  | $ | 366 |  |  | $ | 109 |  |  | $ | 667 |  |  | $ | 9,210 |
ALLL for loans and leases collectively evaluated for impairment | 28,726 |  |  | 44,790 |  |  | 3,117 |  |  | 48,493 |  |  | 5,832 |  |  | 3,104 |  |  | 12,000 |  |  | 20,647 |  |  | 1,487 |  |  | 27,620 |  |  | 195,816 |
Total allowance for loan and lease losses | $ | 28,877 |  |  | $ | 48,278 |  |  | $ | 3,269 |  |  | $ | 50,225 |  |  | $ | 5,907 |  |  | $ | 3,127 |  |  | $ | 14,447 |  |  | $ | 21,013 |  |  | $ | 1,596 |  |  | $ | 28,287 |  |  | $ | 205,026 |
Loans and leases: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans and leases individually evaluated for impairment | $ | 1,045 |  |  | $ | 76,361 |  |  | $ | 1,563 |  |  | $ | 12,600 |  |  | $ | 1,074 |  |  | $ | 142 |  |  | $ | 31,476 |  |  | $ | 7,613 |  |  | $ | 2,613 |  |  | $ | 1,912 |  |  | $ | 136,399 |
Loans and leases collectively evaluated for impairment | 648,112 |  |  | 8,949,859 |  |  | 349,728 |  |  | 2,554,901 |  |  | 825,196 |  |  | 340,122 |  |  | 2,857,648 |  |  | 2,593,731 |  |  | 228,787 |  |  | 1,444,226 |  |  | 20,792,310 |
Total loan and leases | $ | 649,157 |  |  | $ | 9,026,220 |  |  | $ | 351,291 |  |  | $ | 2,567,501 |  |  | $ | 826,270 |  |  | $ | 340,264 |  |  | $ | 2,889,124 |  |  | $ | 2,601,344 |  |  | $ | 231,400 |  |  | $ | 1,446,138 |  |  | $ | 20,928,709 |
| Years ended December 31, 2017, 2016 and 2015
(Dollars in thousands) | Construction and land development - commercial |  | Commercial mortgage |  | Other commercial real estate |  | Commercial and industrial |  | Residential mortgage |  | Revolving mortgage |  | Construction and land development - noncommercial |  | Consumer and other |  | Total
PCI Loans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for loan losses: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at January 1, 2015 | $ | 150 |  |  | $ | 10,135 |  |  | $ | 75 |  |  | $ | 1,240 |  |  | $ | 5,820 |  |  | $ | 3,999 |  |  | $ | 183 |  |  | $ | 27 |  |  | $ | 21,629 |
Provision (credits) | 1,029 |  |  | (1,426 | ) |  | 698 |  |  | (470 | ) |  | 72 |  |  | (2,720 | ) |  | (183 | ) |  | 727 |  |  | (2,273 | )
Charge-offs | (97 | ) |  | (871 | ) |  | — |  |  | (325 | ) |  | (494 | ) |  | (756 | ) |  | — |  |  | (501 | ) |  | (3,044 | )
Recoveries | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Balance at December 31, 2015 | 1,082 |  |  | 7,838 |  |  | 773 |  |  | 445 |  |  | 5,398 |  |  | 523 |  |  | — |  |  | 253 |  |  | 16,312 |
Provision (credits) | (599 | ) |  | (1,249 | ) |  | (266 | ) |  | 59 |  |  | (209 | ) |  | 433 |  |  | — |  |  | (98 | ) |  | (1,929 | )
Charge-offs | — |  |  | (166 | ) |  | (5 | ) |  | — |  |  | (371 | ) |  | — |  |  | — |  |  | (72 | ) |  | (614 | )
Recoveries | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Balance at December 31, 2016 | 483 |  |  | 6,423 |  |  | 502 |  |  | 504 |  |  | 4,818 |  |  | 956 |  |  | — |  |  | 83 |  |  | 13,769 |
Provision (credits) | (148 | ) |  | 437 |  |  | (281 | ) |  | (198 | ) |  | (2,701 | ) |  | (697 | ) |  | — |  |  | 141 |  |  | (3,447 | )
Charge-offs | — |  |  | (296 | ) |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (296 | )
Recoveries | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Balance at December 31, 2017 | $ | 335 |  |  | $ | 6,564 |  |  | $ | 221 |  |  | $ | 306 |  |  | $ | 2,117 |  |  | $ | 259 |  |  | $ | — |  |  | $ | 224 |  |  | $ | 10,026 |
December 31, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
ALLL for loans acquired with deteriorated credit quality | $ | 335 |  |  | $ | 6,564 |  |  | $ | 221 |  |  | $ | 306 |  |  | $ | 2,117 |  |  | $ | 259 |  |  | $ | — |  |  | $ | 224 |  |  | $ | 10,026 |
Loans acquired with deteriorated credit quality | 13,654 |  |  | 358,103 |  |  | 17,124 |  |  | 6,374 |  |  | 299,318 |  |  | 63,908 |  |  | 644 |  |  | 3,873 |  |  | 762,998 |
December 31, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
ALLL for loans acquired with deteriorated credit quality | 483 |  |  | 6,423 |  |  | 502 |  |  | 504 |  |  | 4,818 |  |  | 956 |  |  | — |  |  | 83 |  |  | 13,769 |
Loans acquired with deteriorated credit quality | 20,766 |  |  | 453,013 |  |  | 12,645 |  |  | 11,844 |  |  | 268,777 |  |  | 38,650 |  |  | — |  |  | 3,474 |  |  | 809,169 |
Allowance for Loan and Lease Losses | The following tables provide information on non-PCI impaired loans and leases, exclusive of loans and leases evaluated collectively as a homogeneous group, including interest income recognized in the period during which the loans and leases were considered impaired.
| December 31, 2017
(Dollars in thousands) | With a recorded allowance |  | With no recorded allowance |  | Total |  | Unpaid principal balance |  | Related allowance recorded
Non-PCI impaired loans and leases |  |  |  |  |  |  |  |  |
Construction and land development - commercial | $ | 788 |  |  | $ | — |  |  | $ | 788 |  |  | $ | 1,110 |  |  | $ | 185 |
Commercial mortgage | 39,135 |  |  | 34,520 |  |  | 73,655 |  |  | 78,936 |  |  | 3,648 |
Other commercial real estate | 1,351 |  |  | 506 |  |  | 1,857 |  |  | 2,267 |  |  | 209 |
Commercial and industrial | 6,326 |  |  | 1,648 |  |  | 7,974 |  |  | 10,475 |  |  | 665 |
Lease financing | 1,890 |  |  | 24 |  |  | 1,914 |  |  | 2,571 |  |  | 397 |
Other | — |  |  | 521 |  |  | 521 |  |  | 521 |  |  | — |
Residential mortgage | 19,135 |  |  | 18,707 |  |  | 37,842 |  |  | 39,946 |  |  | 2,733 |
Revolving mortgage | 5,875 |  |  | 17,895 |  |  | 23,770 |  |  | 25,941 |  |  | 1,085 |
Construction and land development - noncommercial | 592 |  |  | 3,959 |  |  | 4,551 |  |  | 5,224 |  |  | 68 |
Consumer | 2,107 |  |  | 667 |  |  | 2,774 |  |  | 3,043 |  |  | 738 |
Total non-PCI impaired loans and leases | $ | 77,199 |  |  | $ | 78,447 |  |  | $ | 155,646 |  |  | $ | 170,034 |  |  | $ | 9,728 |
| December 31, 2016
(Dollars in thousands) | With a recorded allowance |  | With no recorded allowance |  | Total |  | Unpaid principal balance |  | Related allowance recorded
Non-PCI impaired loans and leases |  |  |  |  |  |  |  |  |
Construction and land development - commercial | $ | 1,002 |  |  | $ | 43 |  |  | $ | 1,045 |  |  | $ | 1,172 |  |  | $ | 151 |
Commercial mortgage | 42,875 |  |  | 33,486 |  |  | 76,361 |  |  | 82,658 |  |  | 3,488 |
Other commercial real estate | 1,279 |  |  | 284 |  |  | 1,563 |  |  | 1,880 |  |  | 152 |
Commercial and industrial | 8,920 |  |  | 3,680 |  |  | 12,600 |  |  | 16,637 |  |  | 1,732 |
Lease financing | 1,002 |  |  | 72 |  |  | 1,074 |  |  | 1,074 |  |  | 75 |
Other | 142 |  |  | — |  |  | 142 |  |  | 233 |  |  | 23 |
Residential mortgage | 20,269 |  |  | 11,207 |  |  | 31,476 |  |  | 32,588 |  |  | 2,447 |
Revolving mortgage | 1,825 |  |  | 5,788 |  |  | 7,613 |  |  | 8,831 |  |  | 366 |
Construction and land development - noncommercial | 645 |  |  | 1,968 |  |  | 2,613 |  |  | 3,030 |  |  | 109 |
Consumer | 1,532 |  |  | 380 |  |  | 1,912 |  |  | 2,086 |  |  | 667 |
Total non-PCI impaired loans and leases | $ | 79,491 |  |  | $ | 56,908 |  |  | $ | 136,399 |  |  | $ | 150,189 |  |  | $ | 9,210 |
Non-PCI impaired loans less than $500,000 that are collectively evaluated were $49.1 million and $47.4 million at December 31, 2017 and 2016, respectively. The following tables show the average non-PCI impaired loan balance and the interest income recognized by loan class for the years ended December 31, 2017, 2016 and 2015:
| Year ended December 31, 2017
(Dollars in thousands) | YTD Average Balance |  | YTD Interest Income Recognized
Non-PCI impaired loans and leases: |  |  |
Construction and land development - commercial | $ | 858 |  |  | $ | 37 |
Commercial mortgage | 73,815 |  |  | 2,596 |
Other commercial real estate | 1,642 |  |  | 34 |
Commercial and industrial | 9,847 |  |  | 376 |
Lease financing | 1,753 |  |  | 51 |
Other | 426 |  |  | 22 |
Residential mortgage | 33,818 |  |  | 990 |
Revolving mortgage | 14,022 |  |  | 436 |
Construction and land development - noncommercial | 3,383 |  |  | 145 |
Consumer | 2,169 |  |  | 103 |
Total non-PCI impaired loans and leases | $ | 141,733 |  |  | $ | 4,790 |
| Year ended December 31, 2016
Non-PCI impaired loans and leases: |  |  |
Construction and land development - commercial | $ | 2,700 |  |  | $ | 138 |
Commercial mortgage | 82,146 |  |  | 2,671 |
Other commercial real estate | 1,112 |  |  | 38 |
Commercial and industrial | 11,878 |  |  | 417 |
Lease financing | 1,307 |  |  | 63 |
Other | 687 |  |  | 33 |
Residential mortgage | 26,774 |  |  | 805 |
Revolving mortgage | 6,915 |  |  | 171 |
Construction and land development - noncommercial | 983 |  |  | 50 |
Consumer | 1,480 |  |  | 80 |
Total non-PCI impaired loans and leases | $ | 135,982 |  |  | $ | 4,466 |
| Year ended December 31, 2015
Non-PCI impaired loans and leases: |  |  |
Construction and land development - commercial | $ | 3,164 |  |  | $ | 146 |
Commercial mortgage | 89,934 |  |  | 3,129 |
Other commercial real estate | 481 |  |  | 12 |
Commercial and industrial | 14,587 |  |  | 510 |
Lease financing | 1,718 |  |  | 74 |
Other | 1,673 |  |  | 37 |
Residential mortgage | 18,524 |  |  | 557 |
Revolving mortgage | 4,368 |  |  | 97 |
Construction and land development - noncommercial | 829 |  |  | 38 |
Consumer | 1,126 |  |  | 75 |
Total non-PCI impaired loans and leases | $ | 136,404 |  |  | $ | 4,675 |
Troubled Debt Restructuring, Summary of Accrual Status [Table Text Block] | Subsequent modification of a PCI loan accounted for in a pool that would otherwise meet the definition of a TDR is not reported, or accounted for, as a TDR since pooled PCI loans are excluded from the scope of TDR accounting. The following table provides a summary of total TDRs by accrual status.
| December 31, 2017 |  | December 31, 2016
(Dollars in thousands) | Accruing |  | Nonaccruing |  | Total |  | Accruing |  | Nonaccruing |  | Total
Commercial loans |  |  |  |  |  |  |  |  |  |  |
Construction and land development - commercial | $ | 4,089 |  |  | $ | 483 |  |  | $ | 4,572 |  |  | $ | 3,292 |  |  | $ | 308 |  |  | $ | 3,600 |
Commercial mortgage | 62,358 |  |  | 15,863 |  |  | 78,221 |  |  | 70,263 |  |  | 14,435 |  |  | 84,698 |
Other commercial real estate | 1,012 |  |  | 788 |  |  | 1,800 |  |  | 1,635 |  |  | 80 |  |  | 1,715 |
Commercial and industrial | 7,598 |  |  | 910 |  |  | 8,508 |  |  | 9,193 |  |  | 1,436 |  |  | 10,629 |
Lease financing | 722 |  |  | 1,048 |  |  | 1,770 |  |  | 882 |  |  | 192 |  |  | 1,074 |
Other | 521 |  |  | — |  |  | 521 |  |  | 64 |  |  | 78 |  |  | 142 |
Total commercial loans | 76,300 |  |  | 19,092 |  |  | 95,392 |  |  | 85,329 |  |  | 16,529 |  |  | 101,858 |
Noncommercial |  |  |  |  |  |  |  |  |  |  |
Residential mortgage | 34,067 |  |  | 9,475 |  |  | 43,542 |  |  | 34,012 |  |  | 5,117 |  |  | 39,129 |
Revolving mortgage | 17,673 |  |  | 5,180 |  |  | 22,853 |  |  | 6,346 |  |  | 1,431 |  |  | 7,777 |
Construction and land development - noncommercial | — |  |  | — |  |  | — |  |  | 240 |  |  | — |  |  | 240 |
Consumer and other | 2,351 |  |  | 423 |  |  | 2,774 |  |  | 1,603 |  |  | 309 |  |  | 1,912 |
Total noncommercial loans | 54,091 |  |  | 15,078 |  |  | 69,169 |  |  | 42,201 |  |  | 6,857 |  |  | 49,058 |
Total loans | $ | 130,391 |  |  | $ | 34,170 |  |  | $ | 164,561 |  |  | $ | 127,530 |  |  | $ | 23,386 |  |  | $ | 150,916 |
Troubled Debt Restructurings on Financing Receivables | The following tables provide the types of TDRs made during the years ended December 31, 2017, and 2016, as well as a summary of loans that were modified as a TDR during the years ended December 31, 2017, and 2016 that subsequently defaulted during the years ended December 31, 2017, and 2016. BancShares defines payment default as movement of the TDR to nonaccrual status, which is generally 90 days past due for TDRs, foreclosure or charge-off, whichever occurs first.
| Year ended December 31, 2017 |  | Year ended December 31, 2016
| All restructurings |  | Restructurings with payment default |  | All restructurings |  | Restructurings with payment default
| Number of Loans | Recorded investment at period end |  | Number of Loans | Recorded investment at period end |  | Number of Loans | Recorded investment at period end |  | Number of Loans | Recorded investment at period end
(Dollars in thousands) |  |  |  |  |  |  |  |  |  |  |
Non-PCI loans and leases |  |  |  |  |  |  |  |  |  |  |
Interest only period provided |  |  |  |  |  |  |  |  |  |  |
Commercial mortgage | 4 | $ | 490 |  |  | — | $ | — |  |  | 2 | $ | 569 |  |  | 1 | $ | 326 |
Residential mortgage | — | — |  |  | — | — |  |  | 1 | 122 |  |  | 1 | 122 |
Revolving mortgage | 1 | 82 |  |  | — | — |  |  | — | — |  |  | — | — |
Total interest only | 5 | 572 |  |  | — | — |  |  | 3 | 691 |  |  | 2 | 448 |
Loan term extension |  |  |  |  |  |  |  |  |  |  |
Construction and land development - commercial | — | — |  |  | — | — |  |  | 1 | 40 |  |  | 1 | 40 |
Commercial mortgage | 3 | 2,240 |  |  | — | — |  |  | 7 | 2,428 |  |  | — | — |
Other commercial real estate | — | — |  |  | — | — |  |  | 1 | 747 |  |  | — | — |
Commercial and industrial | 9 | 246 |  |  | — | — |  |  | 8 | 1,070 |  |  | — | — |
Residential mortgage | 10 | 1,915 |  |  | 1 | 243 |  |  | 15 | 2,183 |  |  | — | — |
Revolving mortgage | 14 | 1,233 |  |  | 1 | 30 |  |  | — | — |  |  | — | — |
Construction and land development - noncommercial | 1 | 35 |  |  | — | — |  |  | 2 | 421 |  |  | — | — |
Consumer | 9 | 327 |  |  | — | — |  |  | 3 | 30 |  |  |  | — |
Other | 1 | 521 |  |  | — | — |  |  | — | — |  |  | — | — |
Total loan term extension | 47 | 6,517 |  |  | 2 | 273 |  |  | 37 | 6,919 |  |  | 1 | 40 |
Below market interest rate |  |  |  |  |  |  |  |  |  |  |
Construction and land development - commercial | 3 | 170 |  |  | 2 | 170 |  |  | 6 | 231 |  |  | 1 | — |
Commercial mortgage | 49 | 11,716 |  |  | 16 | 2,001 |  |  | 45 | 12,030 |  |  | 16 | 1,986 |
Commercial and industrial | 27 | 1,227 |  |  | 9 | 452 |  |  | 34 | 3,056 |  |  | 11 | 1,144 |
Other commercial real estate | 5 | 340 |  |  | 3 | 181 |  |  | 3 | 619 |  |  | — | — |
Lease financing | 3 | 633 |  |  | 2 | 588 |  |  | 4 | 152 |  |  | 4 | 152 |
Residential mortgage | 104 | 6,858 |  |  | 33 | 2,867 |  |  | 185 | 11,087 |  |  | 48 | 2,583 |
Revolving mortgage | 129 | 6,457 |  |  | 36 | 1,550 |  |  | 5 | 106 |  |  | — | — |
Construction and land development - noncommercial | 16 | 1,877 |  |  | 3 | 43 |  |  | 15 | 676 |  |  | 4 | 96 |
Consumer | 18 | 95 |  |  | 5 | 30 |  |  | 10 | 222 |  |  | 2 | 15 |
Other | 1 | — |  |  | — | — |  |  | 2 | 120 |  |  | 1 | 78 |
Total below market interest rate | 355 | 29,373 |  |  | 109 | 7,882 |  |  | 309 | 28,299 |  |  | 87 | 6,054 |
Discharged from bankruptcy |  |  |  |  |  |  |  |  |  |  |
Construction and land development - commercial | 1 | 15 |  |  | 1 | 15 |  |  | 1 | 22 |  |  | 1 | 22 |
Commercial mortgage | 8 | 2,052 |  |  | 1 | — |  |  | 4 | 347 |  |  | 2 | 73 |
Commercial and industrial | 10 | 56 |  |  | 7 | — |  |  | 6 | 83 |  |  | — | — |
Lease financing | 17 | 431 |  |  | 16 | 431 |  |  | 1 | 84 |  |  | — | — |
Residential mortgage | 41 | 3,723 |  |  | 17 | 1,161 |  |  | 22 | 773 |  |  | 14 | 326 |
Revolving mortgage | 46 | 2,597 |  |  | 15 | 724 |  |  | 51 | 3,043 |  |  | 13 | 345 |
Construction and land development - noncommercial | 2 | 35 |  |  | 2 | 35 |  |  | — | — |  |  | — | — |
Consumer | 85 | 1,003 |  |  | 30 | 315 |  |  | 69 | 770 |  |  | 23 | 250 |
Total discharged from bankruptcy | 210 | 9,912 |  |  | 89 | 2,681 |  |  | 154 | 5,122 |  |  | 53 | 1,016 |
Total non-PCI restructurings | 617 | $ | 46,374 |  |  | 200 | $ | 10,836 |  |  | 503 | $ | 41,031 |  |  | 143 | $ | 7,558 |
| Year ended December 31, 2017 |  | Year ended December 31, 2016
| All restructurings |  | Restructurings with payment default |  | All restructurings |  | Restructurings with payment default
| Number of Loans | Recorded investment at period end |  | Number of Loans | Recorded investment at period end |  | Number of Loans | Recorded investment at period end |  | Number of Loans | Recorded investment at period end
(Dollars in thousands) |  |  |  |  |  |  |  |  |  |  |
PCI loans |  |  |  |  |  |  |  |  |  |  |
Interest only period provided |  |  |  |  |  |  |  |  |  |  |
Commercial and industrial | 1 | $ | 634 |  |  | 1 | $ | 634 |  |  | — | $ | — |  |  | — | $ | — |
Total interest only | 1 | 634 |  |  | 1 | 634 |  |  | — | — |  |  | — | — |
Below market interest rate |  |  |  |  |  |  |  |  |  |  |
Construction and land development - commercial | — | — |  |  | — | — |  |  | 1 | 52 |  |  | — | — |
Commercial mortgage | 4 | 725 |  |  | — | — |  |  | 4 | 3,255 |  |  | — | — |
Residential mortgage | 4 | 314 |  |  | 1 | 101 |  |  | 3 | 172 |  |  | — | — |
Total below market interest rate | 8 | 1,039 |  |  | 1 | 101 |  |  | 8 | 3,479 |  |  | — | — |
Discharged from bankruptcy |  |  |  |  |  |  |  |  |  |  |
Commercial mortgage | 3 | 458 |  |  | 1 | 262 |  |  | 2 | 2,965 |  |  | 1 | 3 |
Residential mortgage | 3 | 495 |  |  | 1 | 157 |  |  | — | — |  |  | — | — |
Total discharged from bankruptcy | 6 | 953 |  |  | 2 | 419 |  |  | 2 | 2,965 |  |  | 1 | 3 |
Total PCI restructurings | 15 | $ | 2,626 |  |  | 4 | $ | 1,154 |  |  | 10 | $ | 6,444 |  |  | 1 | $ | 3 |

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