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Expense (Benefit) from Income Taxes (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Current: |  |  |
Federal-U.S. | $ 3,908 | $ 1,068 | $ 121
State-U.S. | 1,101 | 122 | 32
Total Current | 5,009 | 1,190 | (212)
Deferred: |  |  |
Federal-U.S. | (1,936) | (1,604) | (353)
State-U.S. | (557) | (87) | (336)
Change in valuation allowance | 5,566 | 6,035 | 3,540
Total Deferred | (2,493) | (1,691) | (689)
(Provision for) benefit from income taxes | 2,516 | (501) | (901)
United Kingdom |  |  |
Current: |  |  |
United Kingdom |  |  | (365)
Republic of Ireland and the United Kingdom |  |  |
Deferred: |  |  |
Ireland and United Kingdom | $ (5,566) | $ (6,035) | $ (3,540)

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