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Loans Held for Investment (LHFI) and Allowance for Loan Losses, LHFI (3) (Details) - USD ($) $ in Thousands | Jun. 30, 2015 | Dec. 31, 2014 | Jun. 30, 2014
--- | --- | --- | ---
Financing Receivable, Modifications [Line Items] |  |  |
Nonaccrual | $ 68,438 | $ 79,343 |
Commercial and Industrial Loans [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Nonaccrual | 12,411 | 12,104 |
Consumer Loans [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Nonaccrual | 44 | $ 88 |
Troubled Debt Restructurings [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Accruing | 2,463 |  | $ 1,543
Nonaccrual | 9,600 |  | 11,063
Total | 12,063 |  | 12,606
Troubled Debt Restructurings [Member] | Construction Land Development and Other Land Loans [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Accruing | 0 |  | 0
Nonaccrual | 1,664 |  | 4,521
Total | 1,664 |  | 4,521
Troubled Debt Restructurings [Member] | Secured by 1-4 Family Residential Properties [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Accruing | 1,635 |  | 1,543
Nonaccrual | 2,795 |  | 3,873
Total | 4,430 |  | 5,416
Troubled Debt Restructurings [Member] | Secured by Nonfarm, Nonresidential Properties [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Accruing | 828 |  | 0
Nonaccrual | 4,584 |  | 1,979
Total | 5,412 |  | 1,979
Troubled Debt Restructurings [Member] | Other Real Estate Secured [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Accruing | 0 |  | 0
Nonaccrual | 62 |  | 159
Total | 62 |  | 159
Troubled Debt Restructurings [Member] | Commercial and Industrial Loans [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Accruing | 0 |  | 0
Nonaccrual | 495 |  | 531
Total | $ 495 |  | $ 531

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- Definition The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=25495931&loc=d3e18845-111554 + Details
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