Discontinued Operations - Summary of Activity for Discontinued Operations (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Discontinued Operations and Disposal Groups [Abstract]
Revenue from discontinued operations		$ 879	$ 1	$ 2,661
Operating loss before income taxes		(46)	(86)	(325)
Income tax benefit from discontinued operations		17	34	123
(Loss) gain on disposal, before income taxes		(22)		85
Income tax benefit (expense) on disposal		8		(32)
Loss from discontinued operations	$ 0	$ (43)	$ (52)	$ (149)