Summary of Loans, Net of Unearned Income (Detail) - USD ($)
$ in Thousands |
Sep. 30, 2016 |
Dec. 31, 2015 |
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Not covered under loss share agreements |
$ 1,774,547
|
$ 1,623,506
|
| Covered under loss share agreements |
61,837
|
83,035
|
| Total Loans held for investment, net of unearned income |
$ 1,836,384
|
$ 1,706,541
|
| Loans held for investment, net of unearned income, percentage |
96.63%
|
95.13%
|
| Covered loan percentage |
3.37%
|
4.87%
|
| Loans and leases receivable net reported amount covered and not covered percentage |
100.00%
|
100.00%
|
| Commercial Loans |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Not covered under loss share agreements |
$ 1,045,427
|
$ 898,087
|
| Covered under loss share agreements |
$ 15,761
|
$ 25,529
|
| Loans held for investment, net of unearned income, percentage |
56.93%
|
52.62%
|
| Commercial Loans | Construction Development And Other Land |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Not covered under loss share agreements |
$ 49,799
|
$ 48,896
|
| Covered under loss share agreements |
$ 4,699
|
$ 6,303
|
| Loans held for investment, net of unearned income, percentage |
2.71%
|
2.86%
|
| Commercial Loans | Commercial and Industrial Loans |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Not covered under loss share agreements |
$ 90,362
|
$ 88,903
|
| Covered under loss share agreements |
$ 941
|
$ 1,170
|
| Loans held for investment, net of unearned income, percentage |
4.92%
|
5.21%
|
| Commercial Loans | Multi-family Residential |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Not covered under loss share agreements |
$ 127,468
|
$ 95,026
|
| Covered under loss share agreements |
$ 43
|
$ 640
|
| Loans held for investment, net of unearned income, percentage |
6.94%
|
5.57%
|
| Commercial Loans | Single-family Non-owner Occupied |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Not covered under loss share agreements |
$ 144,023
|
$ 149,351
|
| Covered under loss share agreements |
$ 1,328
|
$ 2,674
|
| Loans held for investment, net of unearned income, percentage |
7.84%
|
8.75%
|
| Commercial Loans | Non-farm Non-residential Loan |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Not covered under loss share agreements |
$ 596,015
|
$ 485,460
|
| Covered under loss share agreements |
$ 8,312
|
$ 14,065
|
| Loans held for investment, net of unearned income, percentage |
32.46%
|
28.45%
|
| Commercial Loans | Agricultural |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Not covered under loss share agreements |
$ 5,786
|
$ 2,911
|
| Covered under loss share agreements |
$ 26
|
$ 34
|
| Loans held for investment, net of unearned income, percentage |
0.32%
|
0.17%
|
| Commercial Loans | Farmland Loan |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Not covered under loss share agreements |
$ 31,974
|
$ 27,540
|
| Covered under loss share agreements |
$ 412
|
$ 643
|
| Loans held for investment, net of unearned income, percentage |
1.74%
|
1.61%
|
| Consumer Real Estate |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Not covered under loss share agreements |
$ 649,728
|
$ 646,081
|
| Covered under loss share agreements |
$ 45,996
|
$ 57,422
|
| Loans held for investment, net of unearned income, percentage |
35.38%
|
37.86%
|
| Consumer Real Estate | Home Equity Lines |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Not covered under loss share agreements |
$ 108,108
|
$ 107,367
|
| Covered under loss share agreements |
$ 38,737
|
$ 48,565
|
| Loans held for investment, net of unearned income, percentage |
5.89%
|
6.29%
|
| Consumer Real Estate | Single Family Owner Occupied |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Not covered under loss share agreements |
$ 497,695
|
$ 495,209
|
| Covered under loss share agreements |
$ 7,058
|
$ 8,595
|
| Loans held for investment, net of unearned income, percentage |
27.10%
|
29.02%
|
| Consumer Real Estate | Owner Occupied Construction |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Not covered under loss share agreements |
$ 43,925
|
$ 43,505
|
| Covered under loss share agreements |
$ 201
|
$ 262
|
| Loans held for investment, net of unearned income, percentage |
2.39%
|
2.55%
|
| Consumer and Other Loans |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Not covered under loss share agreements |
$ 79,392
|
$ 79,338
|
| Loans held for investment, net of unearned income, percentage |
4.32%
|
4.65%
|
| Consumer and Other Loans | Consumer Loan |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Not covered under loss share agreements |
$ 76,363
|
$ 72,000
|
| Covered under loss share agreements |
$ 80
|
$ 84
|
| Loans held for investment, net of unearned income, percentage |
4.16%
|
4.22%
|
| Consumer and Other Loans | Other Loans |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Not covered under loss share agreements |
$ 3,029
|
$ 7,338
|
| Loans held for investment, net of unearned income, percentage |
0.16%
|
0.43%
|