|
Income Taxes (Details) (USD $)
|
3 Months Ended | |
|---|---|---|
|
Mar. 31, 2013
|
Mar. 31, 2012
|
|
| Income Taxes | ||
| Effective tax rate (as a percent) | 10.30% | 44.70% |
| Federal statutory tax rate (as a percent) | 35.00% | 35.00% |
| Liability for an uncertain tax position | $ 800,000 | |
| Interest or penalties related to uncertain tax positions | 200,000 | 0 |
| Change in unrecognized tax benefits | ||
| Balance at beginning of period | 3,797,000 | 100,000 |
| Additions for tax positions related to prior periods | 835,000 | |
| Balance at end of period | 4,632,000 | 100,000 |
| Deferred tax assets, operating loss carryforwards | ||
| Tax-effected carrying value of federal NOL carryforwards | 32,200,000 | |
| Tax-effected carrying value of state NOL carryforwards | $ 5,300,000 | |