Discontinued Operations (Results of Operations from Discontinued Operations) (Detail) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net income (loss) from discontinued operations	$ (947,000)	$ 2,475,000
DirectStar [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue		34,900,000
Income (loss) from operations before (provision for) benefit from income taxes		5,500,000
Loss on disposal before provision for income taxes		0
(Provision for) benefit from income taxes		(2,100,000)
Net income (loss) from discontinued operations		3,400,000
Globetec [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue	6,300,000	5,400,000
Income (loss) from operations before (provision for) benefit from income taxes	(1,200,000)	(1,500,000)
Impairment of assets, disposal group, before benefit from income taxes	0	0
(Provision for) benefit from income taxes	200,000	600,000
Net income (loss) from discontinued operations	$ (900,000)	$ (900,000)