Discontinued Operations - Summary of Activity for Discontinued Operations (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Discontinued Operations And Disposal Groups [Abstract]
Revenue from discontinued operations	$ 1	$ 833
Operating loss before income taxes	(86)	(219)
Income tax benefit from discontinued operations	34	89
Loss on disposal, before income taxes		(11)
Income tax benefit on disposal		4
Loss from discontinued operations	$ (52)	$ (137)