Income Taxes - Summary of Benefit (Provision) for Income Taxes from Continuing Operation (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current:
United States federal									$ (1,426)	$ (218)	$ (300)
State and local									(12)	(12)	(12)
Foreign									(389)	(75)	(55)
Total current									(1,827)	(305)	(367)
Deferred:
United States federal									585	(2,137)	36,190
State and local									0	0	0
Foreign									(349)	246	660
Total deferred									236	(1,891)	36,850
Income tax, total	$ 56	$ (1,015)	$ (668)	$ 36	$ (422)	$ (599)	$ (92)	$ (1,083)	$ (1,591)	$ (2,196)	$ 36,483