Results of Operations of PVG (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2010		Dec. 31, 2009
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues	$ 303,206		$ 579,931
Income from discontinued operations before taxes	36,832		64,130
Income tax expense	(3,384)	[1]	(10,642)	[1]
Income from discontinued operations, net of taxes	$ 33,448	[2]	$ 53,488	[2]

[1] Determined by applying the effective tax rate attributable to discontinued operations to the income from discontinued operations less noncontrolling interests that are fully attributable to PVG's operations.

[2] For purposes of determining earnings per share, net income attributable to noncontrolling interests is applied against income from discontinued operations as both are completely attributable to PVG's operations.