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Allowance for Loan Losses - Allowance Calculation at the Segment Level and Adjusted Beginning Balance for the Allowance for Credit Losses (Details) (USD $) In Thousands, unless otherwise specified | 6 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2013 | Sep. 30, 2013 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |
Allowance for Loan and Lease Losses, Reserve Estimate Methodology, Historical Loss Period Factor | 48 months | 54 months | 60 months |  |
General reserves as a percent of performing loans | 1.10% | 1.10% |  |  |
Beginning balance | $ 55,537 | $ 55,537 | $ 55,537 | $ 68,444 | $ 143,575
Transfer of loans at fair value |  |  |  |  | 219
Transfer of allowance to held for sale |  |  |  |  | 13,100
Charge-offs |  |  | 19,153 | 61,268 | 133,882
Recoveries |  |  | (19,669) | (12,942) | (8,798)
Net Charge-offs |  |  | (516) | 48,326 | 125,084
Provision (Recovery) |  |  | 3,415 | 35,419 | 63,272
Ending balance |  |  | 59,468 | 55,537 | 68,444
Commercial, financial and agricultural |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance | 15,635 | 15,635 | 15,635 | 16,950 | 11,555
Transfer of loans at fair value |  |  |  |  | 2
Transfer of allowance to held for sale |  |  |  |  | 1,184
Charge-offs |  |  | 6,160 | 26,847 | 18,350
Recoveries |  |  | (1,314) | (1,066) | (1,402)
Net Charge-offs |  |  | 4,846 | 25,781 | 16,948
Provision (Recovery) |  |  | 3,429 | 24,466 | 23,529
Ending balance |  |  | 14,218 | 15,635 | 16,950
Commercial real estate |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance | 11,736 | 11,736 | 11,736 | 15,539 | 24,369
Transfer of loans at fair value |  |  |  |  | 150
Transfer of allowance to held for sale |  |  |  |  | 4,327
Charge-offs |  |  | 1,832 | 10,454 | 23,063
Recoveries |  |  | (726) | (783) | (1,825)
Net Charge-offs |  |  | 1,106 | 9,671 | 21,238
Provision (Recovery) |  |  | 5,269 | 5,868 | 16,885
Ending balance |  |  | 15,899 | 11,736 | 15,539
Construction real estate |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance | 6,841 | 6,841 | 6,841 | 14,433 | 70,462
Transfer of loans at fair value |  |  |  |  | 63
Transfer of allowance to held for sale |  |  |  |  | 1,998
Charge-offs |  |  | 1,791 | 9,985 | 64,166
Recoveries |  |  | (9,378) | (2,979) | (1,463)
Net Charge-offs |  |  | (7,587) | 7,006 | 62,703
Provision (Recovery) |  |  | (7,573) | (586) | 8,735
Ending balance |  |  | 6,855 | 6,841 | 14,433
Residential real estate |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance | 14,759 | 14,759 | 14,759 | 15,692 | 30,259
Transfer of loans at fair value |  |  |  |  | 4
Transfer of allowance to held for sale |  |  |  |  | 5,450
Charge-offs |  |  | 3,207 | 8,607 | 20,691
Recoveries |  |  | (6,000) | (5,559) | (1,719)
Net Charge-offs |  |  | (2,793) | 3,048 | 18,972
Provision (Recovery) |  |  | (3,301) | 2,115 | 9,859
Ending balance |  |  | 14,251 | 14,759 | 15,692
Consumer |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance | 6,566 | 6,566 | 6,566 | 5,830 | 6,925
Transfer of loans at fair value |  |  |  |  | 0
Transfer of allowance to held for sale |  |  |  |  | 141
Charge-offs |  |  | 6,163 | 5,375 | 7,612
Recoveries |  |  | (2,249) | (2,555) | (2,385)
Net Charge-offs |  |  | 3,914 | 2,820 | 5,227
Provision (Recovery) |  |  | 5,593 | 3,556 | 4,273
Ending balance |  |  | 8,245 | 6,566 | 5,830
Leases |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance | 0 | 0 | 0 | 0 | 5
Transfer of loans at fair value |  |  |  |  | 0
Transfer of allowance to held for sale |  |  |  |  | 0
Charge-offs |  |  | 0 | 0 | 0
Recoveries |  |  | (2) | 0 | (4)
Net Charge-offs |  |  | (2) | 0 | (4)
Provision (Recovery) |  |  | (2) | 0 | (9)
Ending balance |  |  | $ 0 | $ 0 | $ 0

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- Definition Allowance For Credit Losses Transfer Of Allowance To Held For Sale + References No definition available. + Details
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- Definition Allowance For Credit Losses Transfer Of Loans At Fair Value + References No definition available. + Details
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- Definition Allowance for Loan and Lease Losses, Reserve Estimate Methodology, Historical Loss Period Factor + References No definition available. + Details
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- Definition Financing Receivables Allowance For Credit Losses Net Charge Offs + References No definition available. + Details
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- Definition General reserves as a percent of performing loans + References No definition available. + Details
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- Definition Amount of recovery of financing receivables doubtful of collection that were previously charged off. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953423-111524 + Details
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- Definition Amount of direct write-downs of financing receivables charged against the allowance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953423-111524 + Details
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- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for 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(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Subparagraph d -Article 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section L -Subsection 1 + Details
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- Definition Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 11 -Article 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953423-111524 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.11) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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