Sources of Tax Effect (Detail) |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
|
| Income Tax Disclosure [Abstract] | |||
| Statutory Tax Rate | 35.00% | 35.00% | (35.00%) |
| State and local income taxes and other, net of federal income tax benefit | (7.10%) | 5.80% | (4.40%) |
| Valuation allowance | 79.10% | 1.50% | 0.00% |
| Tax credits | 136.00% | (8.40%) | (1.20%) |
| Uncertain tax positions | (230.30%) | 0.60% | 2.30% |
| Other items, net | (663.30%) | 2.10% | 0.00% |
| Continuing operations effective income tax rate | (650.60%) | 36.60% | (38.30%) |