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%)