Schedule Of Other Current Assets (Detail) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Other Assets, Current [Line Items]
Payroll tax escrow	$ 1,300,000	$ 5,000,000
Medicare withholds	6,300,000	5,800,000
Income tax receivable		8,400,000
Due from joint ventures	1,500,000	1,400,000
Other	2,300,000	4,000,000
Other current assets, Total	$ 11,440,000	$ 24,630,000