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Loans Held for Investment (LHFI) and Allowance for Loan Losses, LHFI (6) (Details) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2015 USD ($) Loan Market Factor | Mar. 31, 2015 USD ($) | Sep. 30, 2014 USD ($) | Jun. 30, 2014 USD ($) | Jun. 30, 2015 USD ($) Scale | Jun. 30, 2014 USD ($)
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |  |  |
Balance at beginning of period |  | $ 69,616 |  |  | $ 69,616 |
Provision for loan losses, LHFI | $ 1,033 |  |  | $ 351 | 2,818 | $ (454)
Balance at end of period | 71,166 |  |  |  | 71,166 |
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract] |  |  |  |  |  |
Total | $ 71,166 | $ 69,616 |  |  | $ 71,166 |
Number of loan types for commercial portfolio | Loan | 9 |  |  |  |  |
Number of unique qualitative factors used to analyze consumer loans | Market | 5 |  |  |  |  |
Number of risk rate factors for commercial loans | Factor | 450 |  |  |  |  |
Length of loss emergence period in the quantitative portion of the allowance for loan loss methodology for commercial LHFI |  | 1 year 6 months |  |  |  |
Additional provision amount quantitative portion of the allowance for loan loss methodology for commercial LHFI |  | $ 2,300 |  |  |  |
Minimum score for qualitative risk factor | Scale |  |  |  |  | 0 |
Maximum score for qualitative risk factor | Scale |  |  |  |  | 100 |
Amount of provision recapture resulting from the elimination of cap and floors for criticized risk ratings in the qualitative portion of the allowance for loan loss methodology for commercial LHFI |  | 1,800 |  |  |  |
Amount of provision recapture resulting from market region distribution related to qualitative portion of the allowance for loan loss methodology for commercial LHFI |  | 2,100 |  |  |  |
Amount of provision recapture resulting from market region distribution related to quantitative portion of the allowance for loan loss methodology for commercial LHFI |  | 785 |  |  |  |
Additional provision due to revision of methodology |  | 1,100 | $ 822 | 1,400 |  |
Maximum value of commercial LHFI which were subject to further refinement of allowance for loan loss methodology |  |  | 500 |  |  |
Allowance for Loan Loses, LHFI [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |  |  |
Balance at beginning of period |  | 69,616 | 66,648 |  | $ 69,616 | 66,448
Loans charged-off |  |  |  |  | (7,282) | (6,836)
Recoveries |  |  |  |  | 6,014 | 7,490
Net (charge-offs) recoveries |  |  |  |  | (1,268) | 654
Provision for loan losses, LHFI |  |  |  |  | 2,818 | (454)
Balance at end of period | $ 71,166 |  |  | 66,648 | 71,166 | 66,648
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract] |  |  |  |  |  |
Individually | 14,220 |  |  | 6,041 |  |
Collectively | 56,946 |  |  | 60,607 |  |
Total | 71,166 | 69,616 | 66,648 | 66,648 | 69,616 | 66,448
Construction, Land Development And Other Land Properties [Member] | Loans Secured by Real Estate [Member] | Allowance for Loan Loses, LHFI [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |  |  |
Balance at beginning of period |  | 13,073 | 11,035 |  | 13,073 | 13,165
Loans charged-off |  |  |  |  | (928) | (76)
Recoveries |  |  |  |  | 350 | 3,217
Provision for loan losses, LHFI |  |  |  |  | 1,418 | (5,271)
Balance at end of period | 13,913 |  |  | 11,035 | 13,913 | 11,035
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract] |  |  |  |  |  |
Individually | 3,007 |  |  | 2,895 |  |
Collectively | 10,906 |  |  | 8,140 |  |
Total | 13,913 | 13,073 | 11,035 | 11,035 | 13,073 | 13,165
Secured by 1-4 Family Residential Properties [Member] | Loans Secured by Real Estate [Member] | Allowance for Loan Loses, LHFI [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |  |  |
Balance at beginning of period |  | 9,677 | 10,454 |  | 9,677 | 9,633
Loans charged-off |  |  |  |  | (1,195) | (1,634)
Recoveries |  |  |  |  | 106 | 255
Provision for loan losses, LHFI |  |  |  |  | 229 | 2,200
Balance at end of period | 8,817 |  |  | 10,454 | 8,817 | 10,454
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract] |  |  |  |  |  |
Individually | 469 |  |  | 308 |  |
Collectively | 8,348 |  |  | 10,146 |  |
Total | 8,817 | 9,677 | 10,454 | 10,454 | 9,677 | 9,633
Secured by Nonfarm, Nonresidential Properties [Member] | Loans Secured by Real Estate [Member] | Allowance for Loan Loses, LHFI [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |  |  |
Balance at beginning of period |  | 18,523 | 18,584 |  | 18,523 | 19,672
Loans charged-off |  |  |  |  | (158) | (240)
Recoveries |  |  |  |  | 392 | 94
Provision for loan losses, LHFI |  |  |  |  | (292) | (942)
Balance at end of period | 18,465 |  |  | 18,584 | 18,465 | 18,584
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract] |  |  |  |  |  |
Individually | 3,295 |  |  | 1,642 |  |
Collectively | 15,170 |  |  | 16,942 |  |
Total | 18,465 | 18,523 | 18,584 | 18,584 | 18,523 | 19,672
Other Real Estate Secured [Member] | Loans Secured by Real Estate [Member] | Allowance for Loan Loses, LHFI [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |  |  |
Balance at beginning of period |  | 2,141 | 2,463 |  | 2,141 | 2,080
Loans charged-off |  |  |  |  | (24) | (262)
Recoveries |  |  |  |  | 3 | 0
Provision for loan losses, LHFI |  |  |  |  | (160) | 645
Balance at end of period | 1,960 |  |  | 2,463 | 1,960 | 2,463
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract] |  |  |  |  |  |
Individually | 46 |  |  | 53 |  |
Collectively | 1,914 |  |  | 2,410 |  |
Total | 1,960 | 2,141 | 2,463 | 2,463 | 2,141 | 2,080
Commercial and Industrial Loans [Member] | Allowance for Loan Loses, LHFI [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |  |  |
Balance at beginning of period |  | 19,917 | 16,940 |  | 19,917 | 15,522
Loans charged-off |  |  |  |  | (1,256) | (1,656)
Recoveries |  |  |  |  | 1,432 | 286
Provision for loan losses, LHFI |  |  |  |  | 2,715 | 2,788
Balance at end of period | 22,808 |  |  | 16,940 | 22,808 | 16,940
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract] |  |  |  |  |  |
Individually | 7,196 |  |  | 884 |  |
Collectively | 15,612 |  |  | 16,056 |  |
Total | 22,808 | 19,917 | 16,940 | 16,940 | 19,917 | 15,522
Consumer Loans [Member] | Allowance for Loan Loses, LHFI [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |  |  |
Balance at beginning of period |  | 2,149 | 2,334 |  | 2,149 | 2,405
Loans charged-off |  |  |  |  | (1,012) | (883)
Recoveries |  |  |  |  | 1,897 | 1,973
Provision for loan losses, LHFI |  |  |  |  | (1,150) | (1,161)
Balance at end of period | 1,884 |  |  | 2,334 | 1,884 | 2,334
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract] |  |  |  |  |  |
Individually | 0 |  |  | 0 |  |
Collectively | 1,884 |  |  | 2,334 |  |
Total | 1,884 | 2,149 | 2,334 | 2,334 | 2,149 | 2,405
State and Other Political Subdivision Loans [Member] | Allowance for Loan Loses, LHFI [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |  |  |
Balance at beginning of period |  | 1,314 | 1,906 |  | 1,314 | 1,205
Loans charged-off |  |  |  |  | 0 | 0
Recoveries |  |  |  |  | 0 | 0
Provision for loan losses, LHFI |  |  |  |  | (713) | 701
Balance at end of period | 601 |  |  | 1,906 | 601 | 1,906
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract] |  |  |  |  |  |
Individually | 0 |  |  | 0 |  |
Collectively | 601 |  |  | 1,906 |  |
Total | 601 | 1,314 | 1,906 | 1,906 | 1,314 | 1,205
Other Loans [Member] | Allowance for Loan Loses, LHFI [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |  |  |
Balance at beginning of period |  | 2,822 | 2,932 |  | 2,822 | 2,766
Loans charged-off |  |  |  |  | (2,709) | (2,085)
Recoveries |  |  |  |  | 1,834 | 1,665
Provision for loan losses, LHFI |  |  |  |  | 771 | 586
Balance at end of period | 2,718 |  |  | 2,932 | 2,718 | 2,932
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract] |  |  |  |  |  |
Individually | 207 |  |  | 259 |  |
Collectively | 2,511 |  |  | 2,673 |  |
Total | $ 2,718 | $ 2,822 | $ 2,932 | $ 2,932 | $ 2,822 | $ 2,766

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