Components of Income Tax Provision (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended				12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Current:
U.S. federal					$ 30	$ 388	$ 36
U.S. state and local taxes					58	67	178
Total current					88	455	214
Deferred:
U.S. federal					(35,672)	(11,877)	0
U.S. state and local taxes					(1,877)	(2,308)	0
Foreign					(63)
Total deferred					(37,612)	(14,185)	0
Total income tax (benefit) expense	$ (37,769)	$ 210	$ (12)	$ 47	$ (37,524)	$ (13,730)	$ 214