Loans Held for Investment by Internal Credit Risk Grade (Detail) (USD $) | Dec. 31, 2013 | Dec. 31, 2012 |
In Thousands, unless otherwise specified |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | $1,559,039 | $1,517,547 |
Covered under loss share agreements | 151,682 | 207,106 |
Total loans | 1,710,721 | 1,724,653 |
Commercial Loans | Construction Development And Other Land | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 35,255 | 57,434 |
Covered under loss share agreements | 15,865 | 26,595 |
Commercial Loans | Commercial and Industrial | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 95,455 | 88,738 |
Covered under loss share agreements | 3,325 | 6,948 |
Commercial Loans | Multi-family Residential | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 70,197 | 65,694 |
Covered under loss share agreements | 1,933 | 2,611 |
Commercial Loans | Single-family Non-owner Occupied | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 135,559 | 135,912 |
Covered under loss share agreements | 7,449 | 11,428 |
Commercial Loans | Non-farm, Non-residential | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 475,911 | 448,810 |
Covered under loss share agreements | 34,646 | 48,565 |
Commercial Loans | Agricultural | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 2,324 | 1,709 |
Covered under loss share agreements | 164 | 144 |
Commercial Loans | Farmland Loan | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 32,614 | 34,570 |
Covered under loss share agreements | 873 | 1,091 |
Consumer Real Estate | Home Equity Lines | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 111,770 | 111,081 |
Covered under loss share agreements | 69,206 | 81,445 |
Consumer Real Estate | Single Family Owner Occupied | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 496,012 | 473,547 |
Covered under loss share agreements | 16,919 | 22,961 |
Consumer Real Estate | Owner occupied construction | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 28,703 | 16,223 |
Covered under loss share agreements | 1,184 | 1,644 |
Consumer and Other | Consumer Loan | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 71,313 | 78,163 |
Covered under loss share agreements | 118 | 3,674 |
Consumer and Other | Other | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 3,926 | 5,666 |
Pass | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 1,446,703 | 1,362,219 |
Covered under loss share agreements | 110,179 | 81,453 |
Total loans | 1,556,882 | 1,443,672 |
Pass | Commercial Loans | Construction Development And Other Land | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 30,719 | 41,850 |
Covered under loss share agreements | 9,722 | 6,463 |
Pass | Commercial Loans | Commercial and Industrial | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 87,589 | 77,573 |
Covered under loss share agreements | 2,865 | 6,225 |
Pass | Commercial Loans | Multi-family Residential | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 67,257 | 60,161 |
Covered under loss share agreements | 1,472 | 1,962 |
Pass | Commercial Loans | Single-family Non-owner Occupied | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 121,367 | 112,562 |
Covered under loss share agreements | 4,362 | 6,065 |
Pass | Commercial Loans | Non-farm, Non-residential | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 440,334 | 399,907 |
Covered under loss share agreements | 13,077 | 23,855 |
Pass | Commercial Loans | Agricultural | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 2,306 | 1,657 |
Covered under loss share agreements | 164 | 143 |
Pass | Commercial Loans | Farmland Loan | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 27,421 | 28,887 |
Covered under loss share agreements | 572 | 935 |
Pass | Consumer Real Estate | Home Equity Lines | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 107,411 | 104,750 |
Covered under loss share agreements | 66,797 | 16,323 |
Pass | Consumer Real Estate | Single Family Owner Occupied | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 460,166 | 436,587 |
Covered under loss share agreements | 10,832 | 16,011 |
Pass | Consumer Real Estate | Owner occupied construction | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 28,242 | 15,841 |
Covered under loss share agreements | 198 | 484 |
Pass | Consumer and Other | Consumer Loan | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 69,973 | 76,787 |
Covered under loss share agreements | 118 | 2,987 |
Pass | Consumer and Other | Other | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 3,918 | 5,657 |
Special Mention | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 42,313 | 45,835 |
Covered under loss share agreements | 9,060 | 23,735 |
Total loans | 51,373 | 69,570 |
Special Mention | Commercial Loans | Construction Development And Other Land | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 1,094 | 1,497 |
Covered under loss share agreements | 1,378 | 2,120 |
Special Mention | Commercial Loans | Commercial and Industrial | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 1,056 | 2,506 |
Covered under loss share agreements | 247 | 445 |
Special Mention | Commercial Loans | Multi-family Residential | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 2,237 | 4,043 |
Special Mention | Commercial Loans | Single-family Non-owner Occupied | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 4,501 | 5,938 |
Covered under loss share agreements | 1,519 | 2,223 |
Special Mention | Commercial Loans | Non-farm, Non-residential | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 21,046 | 15,975 |
Covered under loss share agreements | 4,630 | 5,477 |
Special Mention | Commercial Loans | Agricultural | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 8 | 19 |
Special Mention | Commercial Loans | Farmland Loan | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 1,721 | 2,262 |
Special Mention | Consumer Real Estate | Home Equity Lines | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 1,355 | 2,739 |
Covered under loss share agreements | 1,138 | 11,981 |
Special Mention | Consumer Real Estate | Single Family Owner Occupied | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 8,170 | 9,599 |
Covered under loss share agreements | 148 | 927 |
Special Mention | Consumer Real Estate | Owner occupied construction | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 261 | 382 |
Special Mention | Consumer and Other | Consumer Loan | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 864 | 867 |
Covered under loss share agreements | ' | 562 |
Special Mention | Consumer and Other | Other | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | ' | 8 |
Substandard | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 65,035 | 103,624 |
Covered under loss share agreements | 32,312 | 101,228 |
Total loans | 97,347 | 204,852 |
Substandard | Commercial Loans | Construction Development And Other Land | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 3,139 | 13,546 |
Covered under loss share agreements | 4,714 | 17,834 |
Substandard | Commercial Loans | Commercial and Industrial | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 2,919 | 4,821 |
Covered under loss share agreements | 189 | 197 |
Substandard | Commercial Loans | Multi-family Residential | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 703 | 1,490 |
Covered under loss share agreements | 461 | 649 |
Substandard | Commercial Loans | Single-family Non-owner Occupied | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 9,316 | 16,092 |
Covered under loss share agreements | 1,552 | 3,015 |
Substandard | Commercial Loans | Non-farm, Non-residential | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 14,500 | 32,808 |
Covered under loss share agreements | 16,901 | 19,189 |
Substandard | Commercial Loans | Agricultural | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 10 | 33 |
Covered under loss share agreements | ' | 1 |
Substandard | Commercial Loans | Farmland Loan | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 3,472 | 3,421 |
Covered under loss share agreements | 301 | 156 |
Substandard | Consumer Real Estate | Home Equity Lines | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 2,789 | 3,592 |
Covered under loss share agreements | 1,269 | 53,116 |
Substandard | Consumer Real Estate | Single Family Owner Occupied | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 27,507 | 27,319 |
Covered under loss share agreements | 5,939 | 5,786 |
Substandard | Consumer Real Estate | Owner occupied construction | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 200 | ' |
Covered under loss share agreements | 986 | 1,160 |
Substandard | Consumer and Other | Consumer Loan | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 472 | 501 |
Covered under loss share agreements | ' | 125 |
Substandard | Consumer and Other | Other | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 8 | 1 |
Doubtful | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 4,984 | 5,827 |
Covered under loss share agreements | 131 | 690 |
Total loans | 5,115 | 6,517 |
Doubtful | Commercial Loans | Construction Development And Other Land | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 303 | 541 |
Covered under loss share agreements | 51 | 178 |
Doubtful | Commercial Loans | Commercial and Industrial | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 3,891 | 3,838 |
Covered under loss share agreements | 24 | 81 |
Doubtful | Commercial Loans | Single-family Non-owner Occupied | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 375 | 1,320 |
Covered under loss share agreements | 16 | 125 |
Doubtful | Commercial Loans | Non-farm, Non-residential | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 31 | 120 |
Covered under loss share agreements | 38 | 44 |
Doubtful | Consumer Real Estate | Home Equity Lines | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 215 | ' |
Covered under loss share agreements | 2 | 25 |
Doubtful | Consumer Real Estate | Single Family Owner Occupied | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 169 | ' |
Covered under loss share agreements | ' | 237 |
Doubtful | Consumer and Other | Consumer Loan | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | ' | 8 |
Loss | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | 4 | 42 |
Total loans | 4 | 42 |
Loss | Consumer Real Estate | Single Family Owner Occupied | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | ' | 42 |
Loss | Consumer and Other | Consumer Loan | ' | ' |
Financing Receivable, Recorded Investment [Line Items] | ' | ' |
Not covered under loss share agreements | $4 | ' |