Discontinued Operations - Summary of SCO Operations as Discontinued Operations (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Discontinued Operations And Disposal Groups [Abstract]
Revenue	$ 29,308	$ 18,689	$ 58,469
Income from discontinued operations	2,366	1,082	4,462
Income tax expense	(806)	(402)	(1,531)
Income from discontinued operations, net of income tax	1,560	680	2,931
Gain on sale		87,892
Income tax expense		(19,019)
Utilization of net operating loss carry-forwards		17,613
Discontinued Operations, sale net of tax		86,486
Reclassification of foreign currency translation from accumulated other comprehensive income		(1,865)
Net gain on sale of discontinued operations		84,621
Net income from discontinued operations	$ 1,560	$ 85,301	$ 2,931