Income Taxes - Schedule of Income Tax benefit (Provisions) from Continuing Operations (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Income (loss) from continuing operations before provisions for income taxes	$ (11,363)	$ 10,778	$ (9,528)	$ (4,396)	$ 1,082	$ 1,199	$ 2,263	$ (95)	$ (14,509)	$ 4,449	$ 6,319
Provision for income taxes from continuing operations	$ (26,785)	$ (3,760)	$ 3,323	$ 1,701	$ 56	$ (1,015)	$ (668)	$ 36	$ (25,521)	$ (1,591)	$ (2,196)
Effective tax rate									(175.90%)	35.80%	34.80%