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Allowance for Probable Loan Losses (Tables) | 12 Months Ended
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Dec. 31, 2014
Allowance for Probable Loan Losses |
Summary of the changes in the allowance for probable loan losses, by loan class |
|  | December 31, 2014 |
|  | Domestic |  |  |  | Foreign |  |  |
|  | Commercial |  | Commercial real estate: other construction & land development |  | Commercial real estate: farmland & commercial |  | Commercial real estate: multifamily |  | Residential: first lien |  | Residential: junior lien |  | Consumer |  | Foreign |  | Total |
|  | (Dollars in Thousands) |  |  |
Balance at December 31, |  | $ | 22,433 |  | $ | 12,541 |  | $ | 24,467 |  | $ | 776 |  | $ | 3,812 |  | $ | 4,249 |  | $ | 750 |  | $ | 1,133 |  | $ | 70,161 |
Losses charge to allowance |  |  | (19,110 | ) |  | (680 | ) |  | (1,893 | ) |  | — |  |  | (351 | ) |  | (661 | ) |  | (719 | ) |  | (51 | ) |  | (23,465 | )
Recoveries credited to allowance |  |  | 2,979 |  |  | 72 |  |  | 107 |  |  | — |  |  | 49 |  |  | 242 |  |  | 210 |  |  | 50 |  |  | 3,709 |
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Net losses charged to allowance |  |  | (16,131 | ) |  | (608 | ) |  | (1,786 | ) |  | — |  |  | (302 | ) |  | (419 | ) |  | (509 | ) |  | (1 | ) |  | (19,756 | )
Provision (credit) charged to operations |  |  | 16,050 |  |  | 1,022 |  |  | (3,998 | ) |  | 70 |  |  | 79 |  |  | 853 |  |  | 419 |  |  | (72 | ) |  | 14,423 |
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Balance at December 31, |  | $ | 22,352 |  | $ | 12,955 |  | $ | 18,683 |  | $ | 846 |  | $ | 3,589 |  | $ | 4,683 |  | $ | 660 |  | $ | 1,060 |  | $ | 64,828 |
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|  | December 31, 2013 |
|  | Domestic |  |  |  | Foreign |  |  |
|  | Commercial |  | Commercial real estate: other construction & land development |  | Commercial real estate: farmland & commercial |  | Commercial real estate: multifamily |  | Residential: first lien |  | Residential: junior lien |  | Consumer |  | Foreign |  | Total |
|  | (Dollars in Thousands) |  |  |
Balance at December 31, |  | $ | 11,632 |  | $ | 12,720 |  | $ | 21,880 |  | $ | 694 |  | $ | 4,390 |  | $ | 4,448 |  | $ | 1,289 |  | $ | 1,140 |  | $ | 58,193 |
Losses charge to allowance |  |  | (11,737 | ) |  | (278 | ) |  | (600 | ) |  | (5 | ) |  | (632 | ) |  | (620 | ) |  | (561 | ) |  | (22 | ) |  | (14,455 | )
Recoveries credited to allowance |  |  | 2,690 |  |  | 87 |  |  | 152 |  |  | — |  |  | 61 |  |  | 298 |  |  | 162 |  |  | 5 |  |  | 3,455 |
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Net losses charged to allowance |  |  | (9,047 | ) |  | (191 | ) |  | (448 | ) |  | (5 | ) |  | (571 | ) |  | (322 | ) |  | (399 | ) |  | (17 | ) |  | (11,000 | )
Provision (credit) charged to operations |  |  | 19,848 |  |  | 12 |  |  | 3,035 |  |  | 87 |  |  | (7 | ) |  | 123 |  |  | (140 | ) |  | 10 |  |  | 22,968 |
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Balance at December 31, |  | $ | 22,433 |  | $ | 12,541 |  | $ | 24,467 |  | $ | 776 |  | $ | 3,812 |  | $ | 4,249 |  | $ | 750 |  | $ | 1,133 |  | $ | 70,161 |
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|  | December 31, 2012 |
|  | Domestic |  |  |  | Foreign |  |  |
|  | Commercial |  | Commercial real estate: other construction & land development |  | Commercial real estate: farmland & commercial |  | Commercial real estate: multifamily |  | Residential: first lien |  | Residential: junior lien |  | Consumer |  | Foreign |  | Total |
|  | (Dollars in Thousands) |  |  |
Balance at December 31, |  | $ | 26,617 |  | $ | 19,940 |  | $ | 24,227 |  | $ | 1,003 |  | $ | 4,562 |  | $ | 4,760 |  | $ | 1,724 |  | $ | 1,359 |  | $ | 84,192 |
Losses charge to allowance |  |  | (34,721 | ) |  | (7,617 | ) |  | (13,724 | ) |  | — |  |  | (227 | ) |  | (1,190 | ) |  | (756 | ) |  | (111 | ) |  | (58,346 | )
Recoveries credited to allowance |  |  | 3,547 |  |  | 229 |  |  | 220 |  |  | — |  |  | 13 |  |  | 195 |  |  | 184 |  |  | — |  |  | 4,388 |
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Net losses charged to allowance |  |  | (31,174 | ) |  | (7,388 | ) |  | (13,504 | ) |  | — |  |  | (214 | ) |  | (995 | ) |  | (572 | ) |  | (111 | ) |  | (53,958 | )
Provision (credit) charged to operations |  |  | 16,189 |  |  | 168 |  |  | 11,157 |  |  | (309 | ) |  | 42 |  |  | 683 |  |  | 137 |  |  | (108 | ) |  | 27,959 |
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Balance at December 31, |  | $ | 11,632 |  | $ | 12,720 |  | $ | 21,880 |  | $ | 694 |  | $ | 4,390 |  | $ | 4,448 |  | $ | 1,289 |  | $ | 1,140 |  | $ | 58,193 |
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Loans individually or collectively evaluated for impairment and related allowance, by loan class |
|  | December 31, 2014 |
|  | Loans individually evaluated for impairment |  | Loans collectively evaluated for impairment |
|  | Recorded Investment |  | Allowance |  | Recorded Investment |  | Allowance |
|  | (Dollars in Thousands) |
Domestic |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial |  | $ | 40,175 |  | $ | 9,112 |  | $ | 1,049,311 |  | $ | 13,240 |
Commercial real estate: other construction & land development |  |  | 10,876 |  |  | 1,890 |  |  | 1,404,101 |  |  | 11,065 |
Commercial real estate: farmland & commercial |  |  | 14,166 |  |  | 1,219 |  |  | 1,887,233 |  |  | 17,464 |
Commercial real estate: multifamily |  |  | 835 |  |  | — |  |  | 115,864 |  |  | 846 |
Residential: first lien |  |  | 5,840 |  |  | — |  |  | 416,186 |  |  | 3,589 |
Residential: junior lien |  |  | 2,895 |  |  | — |  |  | 485,405 |  |  | 4,683 |
Consumer |  |  | 1,384 |  |  | — |  |  | 59,753 |  |  | 660 |
Foreign |  |  | — |  |  | — |  |  | 185,221 |  |  | 1,060 |
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Total |  | $ | 76,171 |  | $ | 12,221 |  | $ | 5,603,074 |  | $ | 52,607 |
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|  | December 31, 2013 |
|  | Loans individually evaluated for impairment |  | Loans collectively evaluated for impairment |
|  | Recorded Investment |  | Allowance |  | Recorded Investment |  | Allowance |
|  | (Dollars in Thousands) |
Domestic |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial |  | $ | 34,183 |  | $ | 12,234 |  | $ | 1,008,459 |  | $ | 10,199 |
Commercial real estate: other construction & land development |  |  | 13,976 |  |  | 852 |  |  | 1,194,532 |  |  | 11,689 |
Commercial real estate: farmland & commercial |  |  | 16,038 |  |  | 2,916 |  |  | 1,734,001 |  |  | 21,551 |
Commercial real estate: multifamily |  |  | 295 |  |  | — |  |  | 101,803 |  |  | 776 |
Residential: first lien |  |  | 6,153 |  |  | — |  |  | 432,309 |  |  | 3,812 |
Residential: junior lien |  |  | 3,206 |  |  | — |  |  | 406,024 |  |  | 4,249 |
Consumer |  |  | 1,606 |  |  | — |  |  | 64,808 |  |  | 750 |
Foreign |  |  | 436 |  |  | — |  |  | 181,406 |  |  | 1,133 |
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Total |  | $ | 75,893 |  | $ | 16,002 |  | $ | 5,123,342 |  | $ | 54,159 |
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Loans accounted on non-accrual basis, by loan class |
|  | December 31, |
|  | 2014 |  | 2013 |
|  | (Dollars in Thousands) |
Domestic |  |  |  |  |  |  |
Commercial |  | $ | 40,121 |  | $ | 34,110 |
Commercial real estate: other construction & land development |  |  | 8,621 |  |  | 11,726 |
Commercial real estate: farmland & commercial |  |  | 11,903 |  |  | 13,775 |
Commercial real estate: multifamily |  |  | 835 |  |  | 295 |
Residential: first lien |  |  | 527 |  |  | 1,266 |
Residential: junior lien |  |  | 1,523 |  |  | 1,576 |
Consumer |  |  | 29 |  |  | 75 |
Foreign |  |  | — |  |  | — |
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Total non-accrual loans |  | $ | 63,559 |  | $ | 62,823 |
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Impaired loans, by loan class |
|  | December 31, 2014 |
|  | Recorded Investment |  | Unpaid Principal Balance |  | Related Allowance |  | Average Recorded Investment |  | Interest Recognized |
|  | (Dollars in Thousands) |
Loans with Related Allowance |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Domestic |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial |  | $ | 19,944 |  | $ | 20,026 |  | $ | 9,112 |  | $ | 19,313 |  | $ | — |
Commercial real estate: other construction & land development |  |  | 6,714 |  |  | 6,949 |  |  | 1,890 |  |  | 7,183 |  |  | — |
Commercial real estate: farmland & commercial |  |  | 5,107 |  |  | 5,257 |  |  | 1,219 |  |  | 6,790 |  |  | 92 |
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Total impaired loans with related allowance |  | $ | 31,765 |  | $ | 32,232 |  | $ | 12,221 |  | $ | 33,286 |  | $ | 92 |
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|  | December 31, 2014 |
|  | Recorded Investment |  | Unpaid Principal Balance |  | Average Recorded Investment |  | Interest Recognized |
|  | (Dollars in Thousands) |
Loans with No Related Allowance |  |  |  |  |  |  |  |  |  |  |  |  |
Domestic |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial |  | $ | 20,231 |  | $ | 20,260 |  | $ | 18,563 |  | $ | 4 |
Commercial real estate: other construction & land development |  |  | 4,162 |  |  | 4,270 |  |  | 4,882 |  |  | 74 |
Commercial real estate: farmland & commercial |  |  | 9,059 |  |  | 10,562 |  |  | 8,664 |  |  | — |
Commercial real estate: multifamily |  |  | 835 |  |  | 835 |  |  | 363 |  |  | — |
Residential: first lien |  |  | 5,840 |  |  | 6,034 |  |  | 6,293 |  |  | 273 |
Residential: junior lien |  |  | 2,895 |  |  | 2,915 |  |  | 3,035 |  |  | 90 |
Consumer |  |  | 1,384 |  |  | 1,386 |  |  | 1,402 |  |  | 3 |
Foreign |  |  | — |  |  | — |  |  | — |  |  | — |
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Total impaired loans with no related allowance |  | $ | 44,406 |  | $ | 46,262 |  | $ | 43,202 |  | $ | 444 |
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|  | December 31, 2013 |
|  | Recorded Investment |  | Unpaid Principal Balance |  | Related Allowance |  | Average Recorded Investment |  | Interest Recognized |
|  | (Dollars in Thousands) |
Loans with Related Allowance |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Domestic |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial |  | $ | 17,178 |  | $ | 17,177 |  | $ | 12,234 |  | $ | 18,019 |  | $ | 38 |
Commercial real estate: other construction & land development |  |  | 6,818 |  |  | 6,825 |  |  | 852 |  |  | 6,058 |  |  | — |
Commercial real estate: farmland & commercial |  |  | 7,259 |  |  | 10,697 |  |  | 2,916 |  |  | 7,167 |  |  | 92 |
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Total impaired loans with related allowance |  | $ | 31,255 |  | $ | 34,699 |  | $ | 16,002 |  | $ | 31,244 |  | $ | 130 |
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|  | December 31, 2013 |
|  | Recorded Investment |  | Unpaid Principal Balance |  | Average Recorded Investment |  | Interest Recognized |
|  | (Dollars in Thousands) |
Loans with No Related Allowance |  |  |  |  |  |  |  |  |  |  |  |  |
Domestic |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial |  | $ | 17,005 |  | $ | 17,023 |  | $ | 16,778 |  | $ | 2 |
Commercial real estate: other construction & land development |  |  | 7,158 |  |  | 7,187 |  |  | 18,164 |  |  | 74 |
Commercial real estate: farmland & commercial |  |  | 8,779 |  |  | 9,949 |  |  | 7,313 |  |  | — |
Commercial real estate: multifamily |  |  | 295 |  |  | 295 |  |  | 322 |  |  | — |
Residential: first lien |  |  | 6,153 |  |  | 6,258 |  |  | 4,860 |  |  | 179 |
Residential: junior lien |  |  | 3,206 |  |  | 3,226 |  |  | 2,347 |  |  | 99 |
Consumer |  |  | 1,606 |  |  | 1,612 |  |  | 1,380 |  |  | 1 |
Foreign |  |  | 436 |  |  | 436 |  |  | 452 |  |  | 19 |
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Total impaired loans with no related allowance |  | $ | 44,638 |  | $ | 45,986 |  | $ | 51,616 |  | $ | 374 |
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Loans accounted for as trouble debt restructuring, by loan class |
|  | December 31, 2014 |  | December 31, 2013 |
|  | (Dollars in Thousands) |
Domestic |  |  |  |  |  |  |
Commercial |  | $ | 2,500 |  | $ | 150 |
Commercial real estate: other construction & land development |  |  | 2,254 |  |  | 8,860 |
Commercial real estate: farmland & commercial |  |  | 2,861 |  |  | 2,863 |
Residential: first lien |  |  | 5,313 |  |  | 4,887 |
Residential: junior lien |  |  | 1,371 |  |  | 1,631 |
Consumer |  |  | 1,354 |  |  | 1,531 |
Foreign |  |  | — |  |  | 436 |
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Total troubled debt restructuring |  | $ | 15,653 |  | $ | 20,358 |
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Information regarding the aging of past due loans, by loan class |
|  | December 31, 2014 |
|  | 30 - 59 Days |  | 60 - 89 Days |  | 90 Days or Greater |  | 90 Days or greater & still accruing |  | Total Past due |  | Current |  | Total Portfolio |
|  | (Dollars in Thousands) |
Domestic |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial |  | $ | 4,103 |  | $ | 2,665 |  | $ | 40,665 |  | $ | 2,890 |  | $ | 47,433 |  | $ | 1,042,053 |  | $ | 1,089,486 |
Commercial real estate: other construction & land development |  |  | 596 |  |  | 10 |  |  | 8,707 |  |  | 439 |  |  | 9,313 |  |  | 1,405,664 |  |  | 1,414,977 |
Commercial real estate: farmland & commercial |  |  | 2,905 |  |  | 7,131 |  |  | 10,724 |  |  | 1,711 |  |  | 20,760 |  |  | 1,880,639 |  |  | 1,901,399 |
Commercial real estate: multifamily |  |  | 351 |  |  | — |  |  | 856 |  |  | 21 |  |  | 1,207 |  |  | 115,492 |  |  | 116,699 |
Residential: first lien |  |  | 5,895 |  |  | 1,864 |  |  | 4,267 |  |  | 3,901 |  |  | 12,026 |  |  | 410,000 |  |  | 422,026 |
Residential: junior lien |  |  | 899 |  |  | 231 |  |  | 1,931 |  |  | 431 |  |  | 3,061 |  |  | 485,239 |  |  | 488,300 |
Consumer |  |  | 896 |  |  | 216 |  |  | 507 |  |  | 482 |  |  | 1,619 |  |  | 59,518 |  |  | 61,137 |
Foreign |  |  | 1,616 |  |  | 98 |  |  | 113 |  |  | 113 |  |  | 1,827 |  |  | 183,394 |  |  | 185,221 |
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Total past due loans |  | $ | 17,261 |  | $ | 12,215 |  | $ | 67,770 |  | $ | 9,988 |  | $ | 97,246 |  | $ | 5,581,999 |  | $ | 5,679,245 |
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|  | December 31, 2013 |
|  | 30 - 59 Days |  | 60 - 89 Days |  | 90 Days or Greater |  | 90 Days or greater & still accruing |  | Total Past due |  | Current |  | Total Portfolio |
|  | (Dollars in Thousands) |
Domestic |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial |  | $ | 4,240 |  | $ | 538 |  | $ | 36,066 |  | $ | 2,051 |  | $ | 40,844 |  | $ | 1,001,798 |  | $ | 1,042,642 |
Commercial real estate: other construction & land development |  |  | 1,042 |  |  | — |  |  | 9,942 |  |  | 62 |  |  | 10,984 |  |  | 1,197,524 |  |  | 1,208,508 |
Commercial real estate: farmland & commercial |  |  | 6,216 |  |  | 520 |  |  | 6,990 |  |  | 417 |  |  | 13,726 |  |  | 1,736,313 |  |  | 1,750,039 |
Commercial real estate: multifamily |  |  | 39 |  |  | 142 |  |  | 295 |  |  | — |  |  | 476 |  |  | 101,622 |  |  | 102,098 |
Residential: first lien |  |  | 4,758 |  |  | 3,046 |  |  | 4,541 |  |  | 3,518 |  |  | 12,345 |  |  | 426,117 |  |  | 438,462 |
Residential: junior lien |  |  | 606 |  |  | 198 |  |  | 1,900 |  |  | 368 |  |  | 2,704 |  |  | 406,526 |  |  | 409,230 |
Consumer |  |  | 1,523 |  |  | 469 |  |  | 803 |  |  | 781 |  |  | 2,795 |  |  | 63,619 |  |  | 66,414 |
Foreign |  |  | 1,467 |  |  | 417 |  |  | — |  |  | — |  |  | 1,884 |  |  | 179,958 |  |  | 181,842 |
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Total past due loans |  | $ | 19,891 |  | $ | 5,330 |  | $ | 60,537 |  | $ | 7,197 |  | $ | 85,758 |  | $ | 5,113,477 |  | $ | 5,199,235 |
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Summary of the loan portfolio by credit quality indicator, by loan class |
|  |  |  | December 31, 2014 |
|  | Pass |  | Special Review |  | Watch List—Pass |  | Watch List— Substandard |  | Watch List— Impaired |
|  |  |  | (Dollars in Thousands) |
Domestic |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial |  | $ | 961,490 |  | $ | 38,382 |  | $ | 3,793 |  | $ | 45,646 |  | $ | 40,175 |
Commercial real estate: other construction & land development |  |  | 1,353,971 |  |  | 1,005 |  |  | 10,428 |  |  | 38,697 |  |  | 10,876 |
Commercial real estate: farmland & commercial |  |  | 1,754,741 |  |  | 11,674 |  |  | 23,453 |  |  | 97,365 |  |  | 14,166 |
Commercial real estate: multifamily |  |  | 115,729 |  |  | — |  |  | — |  |  | 135 |  |  | 835 |
Residential: first lien |  |  | 412,668 |  |  | 3,500 |  |  | — |  |  | 18 |  |  | 5,840 |
Residential: junior lien |  |  | 484,968 |  |  | — |  |  | — |  |  | 437 |  |  | 2,895 |
Consumer |  |  | 59,622 |  |  | — |  |  | — |  |  | 131 |  |  | 1,384 |
Foreign |  |  | 185,221 |  |  | — |  |  | — |  |  | — |  |  | — |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total |  | $ | 5,328,410 |  | $ | 54,561 |  | $ | 37,674 |  | $ | 182,429 |  | $ | 76,171 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
|  |  |  | December 31, 2013 |
|  | Pass |  | Special Review |  | Watch List—Pass |  | Watch List— Substandard |  | Watch List— Impaired |
|  |  |  | (Dollars in Thousands) |
Domestic |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial |  | $ | 955,522 |  | $ | 2,270 |  | $ | 4,389 |  | $ | 46,278 |  | $ | 34,183 |
Commercial real estate: other construction & land development |  |  | 1,167,295 |  |  | 14,247 |  |  | 9,318 |  |  | 3,672 |  |  | 13,976 |
Commercial real estate: farmland & commercial |  |  | 1,635,179 |  |  | 56,438 |  |  | 21,912 |  |  | 20,472 |  |  | 16,038 |
Commercial real estate: multifamily |  |  | 100,948 |  |  | — |  |  | — |  |  | 855 |  |  | 295 |
Residential: first lien |  |  | 432,067 |  |  | 122 |  |  | — |  |  | 120 |  |  | 6,153 |
Residential: junior lien |  |  | 405,731 |  |  | — |  |  | — |  |  | 293 |  |  | 3,206 |
Consumer |  |  | 64,808 |  |  | — |  |  | — |  |  | — |  |  | 1,606 |
Foreign |  |  | 180,837 |  |  | — |  |  | — |  |  | 569 |  |  | 436 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total |  | $ | 4,942,387 |  | $ | 73,077 |  | $ | 35,619 |  | $ | 72,259 |  | $ | 75,893 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​

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