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Loans - Recorded Investment by Loan Grade (Details) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Five Rated [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Commercial loans | $ 24,703 | $ 16,252
Five Rated [Member] | Commercial, financial and agricultural |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Commercial loans | 4,392 | 1,874
Five Rated [Member] | Commercial real estate |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Commercial loans | 14,880 | 8,448
Five Rated [Member] | Remaining commercial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Commercial loans | 2,151 | 3,349
Five Rated [Member] | Commercial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Commercial loans | 3,280 | 2,581
Six Rated [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Commercial loans | 4,272 | 3,568
Six Rated [Member] | Commercial, financial and agricultural |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Commercial loans | 347 | 1,201
Six Rated [Member] | Commercial real estate |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Commercial loans | 3,417 | 1,712
Six Rated [Member] | Remaining commercial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Commercial loans | 122 | 57
Six Rated [Member] | Commercial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Commercial loans | 386 | 598
Impaired [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Commercial loans | 80,692 | 73,729
Impaired [Member] | Commercial, financial and agricultural |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Commercial loans | 30,623 | 19,123
Impaired [Member] | Commercial real estate |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Commercial loans | 18,025 | 21,989
Impaired [Member] | SEPH commercial land and development |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Commercial loans | 2,044 |
Impaired [Member] | SEPH commercial land and development |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Commercial loans |  | 2,078
Impaired [Member] | Remaining commercial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Commercial loans | 4,676 | 5,609
Impaired [Member] | Commercial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Commercial loans | 25,324 | 24,930
Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Commercial loans | 2,511,975 | 2,378,859
Pass [Member] | Commercial, financial and agricultural |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Commercial loans | 923,802 | 837,555
Pass [Member] | Commercial real estate |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Commercial loans | 1,081,290 | 1,041,034
Pass [Member] | SEPH commercial land and development |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Commercial loans |  | 117
Pass [Member] | Remaining commercial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Commercial loans | 121,418 | 106,424
Pass [Member] | Commercial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Commercial loans | 382,595 | 390,541
Pass [Member] | Leases |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Commercial loans | 2,870 | 3,188
Recorded Investment [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Commercial loans | 2,621,642 | 2,472,408
Recorded Investment [Member] | Commercial, financial and agricultural |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Commercial loans | 959,164 | 859,753
Recorded Investment [Member] | Commercial real estate |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Commercial loans | 1,117,612 | 1,073,183
Recorded Investment [Member] | SEPH commercial land and development |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Commercial loans | 2,044 |
Recorded Investment [Member] | SEPH commercial land and development |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Commercial loans |  | 2,195
Recorded Investment [Member] | Remaining commercial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Commercial loans | 128,367 | 115,439
Recorded Investment [Member] | Commercial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Commercial loans | 411,585 | 418,650
Recorded Investment [Member] | Leases |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Commercial loans | $ 2,870 | $ 3,188

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- Definition Amount before allowance of commercial loans and leases receivable includes, but not limited to, commercial and industrial loans, agricultural loans, mortgage loans, promissory notes, interbank and other loans to financial institutions, draws against credit facilities, trade financing, lease financings. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(a),(b)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522 + Details
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