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Reconciliation of Benefit for Income Taxes and Amount Computed by Applying Statutory Federal Income Tax Rate to Loss Before Benefit for Income Taxes (Detail)
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12 Months Ended | ||
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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| Effective Income Tax Rate Reconciliation, Percent [Abstract] | |||
| U.S. federal income tax benefit at statutory rate | 35.00% | 35.00% | 35.00% |
| State and local income taxes, net of federal benefit | 4.10% | 4.30% | (8.40%) |
| Compensation | (0.30%) | (0.40%) | (3.70%) |
| Transaction costs | 0.00% | (2.40%) | (10.20%) |
| Change in fair value of contingent consideration | 0.10% | (1.20%) | 6.70% |
| Loss on disposal of China Water | 0.00% | 0.00% | 976.90% |
| Change in valuation allowance | (2.10%) | 55.40% | (909.50%) |
| Other | (1.50%) | (0.30%) | 10.40% |
| Benefit for income taxes | 35.30% | 90.40% | 97.20% |