Discontinued Operations - Summary of Activity for Discontinued Operations (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Discontinued Operations And Disposal Groups [Abstract]
Revenue from discontinued operations		$ 948	$ 1	$ 1,781
Operating loss before income taxes		(60)	(86)	(280)
Income tax benefit from discontinued operations		24	34	113
Gain on disposal, before income taxes		119		107
Income tax expense on disposal		(48)		(43)
Income (loss) from discontinued operations		$ 35	$ (52)	$ (103)