|
Income Taxes - Additional Information (Detail) (USD $)
|
3 Months Ended | |
|---|---|---|
|
Mar. 31, 2013
|
Mar. 31, 2012
|
|
| Income Tax Disclosure [Abstract] | ||
| Amount added to valuation allowance | $ 1,500,000 | |
| Cumulative valuation allowance | 90,400,000 | |
| Tax expense | 362,000 | 391,000 |
| Deferred tax liability, indefinite-lived intangible assets | 7,400,000 | |
| Unrecognized tax benefits | 70,000 | |
| Unrecognized tax benefits, which if recognized would impact on effective tax rate | 50,000 | |
| Interest on income tax | $ 20,000 | |