Covered Assets and FDIC Loss-sharing Asset (Analysis and Allowance for Losses on Covered Loans) (Details) (USD $) In Thousands, unless otherwise specified | Sep. 30, 2011 | Dec. 31, 2010 |
|---|---|---|
| Covered Loans | $ 798,125 | $ 714,733 |
| Allowance for Loan Losses | 8,327 | 6,055 |
| Valuation discount resulting from acquisition accounting | 218,993 | 191,617 |
| Covered loans, net | 570,805 | 517,061 |
Commercial Business [Member] | ||
| Covered Loans | 220,727 | 165,255 |
| Weighted-Average Risk Rating | 6.09 | 5.7400 |
| Allowance for Loan Losses | 2,018 | 2,903 |
Real Estate One-To-Four Family [Member] | ||
| Covered Loans | 84,724 | 68,700 |
| Weighted-Average Risk Rating | 5.33 | 4.7700 |
| Allowance for Loan Losses | 1,071 | 1,013 |
Real Estate Commercial & Multifamily Residential [Member] | ||
| Covered Loans | 346,406 | 341,063 |
| Weighted-Average Risk Rating | 5.90 | 5.7000 |
| Allowance for Loan Losses | 4,293 | 821 |
Construction One-To-Four Family Residential[Member] | ||
| Covered Loans | 55,928 | 39,754 |
| Weighted-Average Risk Rating | 7.40 | 7.2900 |
| Allowance for Loan Losses | 205 | 98 |
Construction Commercial & Multifamily Residential [Member] | ||
| Covered Loans | 30,034 | 41,624 |
| Weighted-Average Risk Rating | 7.15 | 6.7900 |
| Allowance for Loan Losses | 134 | 469 |
Consumer [Member] | ||
| Covered Loans | 60,306 | 58,337 |
| Weighted-Average Risk Rating | 5.07 | 4.4900 |
| Allowance for Loan Losses | $ 606 | $ 751 |