Discontinued Operations - Summary of Activity for Discontinued Operations (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Discontinued Operations And Disposal Groups [Abstract]
Revenue from discontinued operations	$ 3,151	$ 7,895	$ 10,677
Operating (loss) income before income taxes	(460)	22	(366)
Income tax benefit (expense) for discontinued operations	184	(7)	122
Gain on disposal, before taxes	803	1,168	231
Income tax expense on disposal	(321)	(358)	(77)
Income (loss) from discontinued operations	$ 206	$ 825	$ (90)