Results of Spanish Operations Included in Discontinued Operations (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended				12 Months Ended
	Sep. 30, 2012		Sep. 30, 2011		Sep. 30, 2012		Sep. 30, 2011		Dec. 31, 2011
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
(Loss) from discontinued operations, net of taxes			$ (755)		$ (820)		$ (3,091)
(Loss) on sale of discontinued operations before income taxes					(10,707)
(Loss) on sale of discontinued operations, net of taxes					(10,707)
Spain [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues			9,235		10,102		29,582		39,300
(Loss) from discontinued operations before income taxes			(755)		(820)		(3,091)
Income taxes		[1]		[1]		[1]		[1]
(Loss) from discontinued operations, net of taxes			(755)		(820)		(3,091)
(Loss) on sale of discontinued operations before income taxes					(10,707)
Income taxes		[1]		[1]		[1]		[1]
(Loss) on sale of discontinued operations, net of taxes					$ (10,707)

[1] There were no income taxes as any tax benefit from the losses would be offset by a valuation allowance.