Discontinued Operations (Results of Operations from Discontinued Operations) (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss on disposal and impairment charges, before tax			$ (6,036,000)	$ (12,922,000)
Net loss from discontinued operations	(3,735,000)	(9,281,000)	(5,165,000)	(7,881,000)
Globetec [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue	4,800,000	4,800,000	18,000,000	13,500,000
Loss from operations, before tax	(500,000)	(2,600,000)	(2,700,000)	(5,800,000)
Loss on disposal and impairment charges, before tax	(5,700,000)	(12,700,000)	(6,000,000)	(12,700,000)
Benefit from income taxes	2,500,000	6,000,000	3,500,000	6,900,000
Net loss from discontinued operations	$ (3,700,000)	$ (9,300,000)	$ (5,200,000)	$ (11,600,000)