Discontinued Operations - Revenue and Components of 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		$ 5,704	$ 18,626
(Loss) income from discontinued operations before income taxes	(2,900)	(11,942)	595
Income tax benefit (expense)	1,160	4,678	(230)
(Loss) income from discontinued operations	(1,740)	(7,264)	365
Loss on sale of discontinued operations, before income taxes		(2,416)
Income tax benefit		586
Loss on sale of discontinued operations		(1,830)
Total (loss) income from discontinued operations	$ (1,740)	$ (9,094)	$ 365