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Loans Held for Investment (LHFI) and Allowance for Loan Losses, LHFI (5) (Details) - USD ($) $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 30, 2015 | Dec. 31, 2014
Financing Receivable, Recorded Investment, Aging [Abstract] |  |  |
Total Past Due |  | $ 18,031 | $ 21,055
Nonaccrual |  | 68,438 | 79,343
Current Loans |  | 6,360,604 | 6,349,071
Total LHFI |  | 6,447,073 | 6,449,469
LHFS past due 90 days or more |  | $ 12,000 | 25,900
Percentage of outstanding principal to be repurchased under GNMA optional repurchase program (in hundredths) |  | 100.00% |
Amount of delinquent loans repurchased |  | $ 28,500 |
Repurchase gain included in gain on sales of loans |  | 304 |
Past Due 30 to 59 Days [Member] |  |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |  |
Total Past Due |  | 11,671 | 15,146
Past Due 60 to 89 Days [Member] |  |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |  |
Total Past Due |  | 4,589 | 3,145
Past Due 90 Days or More [Member] |  |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |  |
Total Past Due | [1] | 1,771 | 2,764
Construction, Land Development And Other Land Properties [Member] | Loans Secured by Real Estate [Member] |  |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |  |
Total Past Due |  | 691 | 325
Nonaccrual |  | 10,888 | 13,867
Current Loans |  | 670,865 | 605,685
Total LHFI |  | 682,444 | 619,877
Construction, Land Development And Other Land Properties [Member] | Loans Secured by Real Estate [Member] | Past Due 30 to 59 Days [Member] |  |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |  |
Total Past Due |  | 643 | 248
Construction, Land Development And Other Land Properties [Member] | Loans Secured by Real Estate [Member] | Past Due 60 to 89 Days [Member] |  |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |  |
Total Past Due |  | 48 | 17
Construction, Land Development And Other Land Properties [Member] | Loans Secured by Real Estate [Member] | Past Due 90 Days or More [Member] |  |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |  |
Total Past Due | [1] | 0 | 60
Secured by 1-4 Family Residential Properties [Member] | Loans Secured by Real Estate [Member] |  |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |  |
Total Past Due |  | 12,859 | 13,219
Nonaccrual |  | 24,882 | 25,621
Current Loans |  | 1,600,192 | 1,595,557
Total LHFI |  | 1,637,933 | 1,634,397
Secured by 1-4 Family Residential Properties [Member] | Loans Secured by Real Estate [Member] | Past Due 30 to 59 Days [Member] |  |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |  |
Total Past Due |  | 7,750 | 8,424
Secured by 1-4 Family Residential Properties [Member] | Loans Secured by Real Estate [Member] | Past Due 60 to 89 Days [Member] |  |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |  |
Total Past Due |  | 3,594 | 2,428
Secured by 1-4 Family Residential Properties [Member] | Loans Secured by Real Estate [Member] | Past Due 90 Days or More [Member] |  |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |  |
Total Past Due | [1] | 1,515 | 2,367
Secured by Nonfarm, Nonresidential Properties [Member] | Loans Secured by Real Estate [Member] |  |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |  |
Total Past Due |  | 628 | 1,994
Nonaccrual |  | 19,030 | 25,717
Current Loans |  | 1,547,377 | 1,525,482
Total LHFI |  | 1,567,035 | 1,553,193
Secured by Nonfarm, Nonresidential Properties [Member] | Loans Secured by Real Estate [Member] | Past Due 30 to 59 Days [Member] |  |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |  |
Total Past Due |  | 534 | 1,960
Secured by Nonfarm, Nonresidential Properties [Member] | Loans Secured by Real Estate [Member] | Past Due 60 to 89 Days [Member] |  |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |  |
Total Past Due |  | 94 | 34
Secured by Nonfarm, Nonresidential Properties [Member] | Loans Secured by Real Estate [Member] | Past Due 90 Days or More [Member] |  |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |  |
Total Past Due | [1] | 0 | 0
Other Real Estate Secured [Member] | Loans Secured by Real Estate [Member] |  |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |  |
Total Past Due |  | 0 | 80
Nonaccrual |  | 610 | 1,318
Current Loans |  | 239,446 | 252,389
Total LHFI |  | 240,056 | 253,787
Other Real Estate Secured [Member] | Loans Secured by Real Estate [Member] | Past Due 30 to 59 Days [Member] |  |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |  |
Total Past Due |  | 0 | 80
Other Real Estate Secured [Member] | Loans Secured by Real Estate [Member] | Past Due 60 to 89 Days [Member] |  |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |  |
Total Past Due |  | 0 | 0
Other Real Estate Secured [Member] | Loans Secured by Real Estate [Member] | Past Due 90 Days or More [Member] |  |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |  |
Total Past Due | [1] | 0 | 0
Commercial and Industrial Loans [Member] |  |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |  |
Total Past Due |  | 1,871 | 2,923
Nonaccrual |  | 12,411 | 12,104
Current Loans |  | 1,205,402 | 1,255,323
Total LHFI |  | 1,219,684 | 1,270,350
Commercial and Industrial Loans [Member] | Past Due 30 to 59 Days [Member] |  |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |  |
Total Past Due |  | 1,226 | 2,491
Commercial and Industrial Loans [Member] | Past Due 60 to 89 Days [Member] |  |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |  |
Total Past Due |  | 645 | 306
Commercial and Industrial Loans [Member] | Past Due 90 Days or More [Member] |  |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |  |
Total Past Due | [1] | 0 | 126
Consumer Loans [Member] |  |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |  |
Total Past Due |  | 1,677 | 2,373
Nonaccrual |  | 44 | 88
Current Loans |  | 163,494 | 165,503
Total LHFI |  | 165,215 | 167,964
Consumer Loans [Member] | Past Due 30 to 59 Days [Member] |  |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |  |
Total Past Due |  | 1,213 | 1,811
Consumer Loans [Member] | Past Due 60 to 89 Days [Member] |  |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |  |
Total Past Due |  | 208 | 351
Consumer Loans [Member] | Past Due 90 Days or More [Member] |  |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |  |
Total Past Due | [1] | 256 | 211
State and Other Political Subdivision Loans [Member] |  |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |  |
Total Past Due |  | 0 | 0
Nonaccrual |  | 0 | 0
Current Loans |  | 574,265 | 602,727
Total LHFI |  | 574,265 | 602,727
State and Other Political Subdivision Loans [Member] | Past Due 30 to 59 Days [Member] |  |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |  |
Total Past Due |  | 0 | 0
State and Other Political Subdivision Loans [Member] | Past Due 60 to 89 Days [Member] |  |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |  |
Total Past Due |  | 0 | 0
State and Other Political Subdivision Loans [Member] | Past Due 90 Days or More [Member] |  |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |  |
Total Past Due | [1] | 0 | 0
Other Loans [Member] |  |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |  |
Total Past Due |  | 305 | 141
Nonaccrual |  | 573 | 628
Current Loans |  | 359,563 | 346,405
Total LHFI |  | 360,441 | 347,174
Other Loans [Member] | Past Due 30 to 59 Days [Member] |  |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |  |
Total Past Due |  | 305 | 132
Other Loans [Member] | Past Due 60 to 89 Days [Member] |  |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |  |
Total Past Due |  | 0 | 9
Other Loans [Member] | Past Due 90 Days or More [Member] |  |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |  |
Total Past Due | [1] | $ 0 | $ 0
[1] | Past due 90 days or more but still accruing interest.

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