Discontinued Operations - Summary of Activity for Discontinued Operations (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Discontinued Operations and Disposal Groups [Abstract]
Revenue from discontinued operations	$ 0	$ 0	$ 0	$ 1
Operating income before income taxes	0	0	0	(86)
Income tax expense from discontinued operations	0	0	0	34
Loss on disposal, before income taxes	0	0	0	0
Income tax benefit on disposal	0	0	0	0
Loss from discontinued operations	$ 0	$ 0	$ 0	$ (52)