Supplemental Disclosure of Cash Flow Information (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Supplemental Disclosure of Cash Flow Information [Abstract]
Interest paid	$ 125,047	$ 132,425	$ 131,347
Income taxes paid	2,431	2,223	1,682
Write-off of deferred financing costs	2,080	2,878	2,725
Supplemental Schedule of Non-cash Operating, Investing and Financing Activities [Abstract]
Reclassification of other intangibles, net			141
Reinvested income on marketable securities-restricted	1,426
De-consolidation of leased development property [Member]
Supplemental Schedule of Non-cash Operating, Investing and Financing Activities [Abstract]
Property, plant and equipment and leasehold intangibles, net			(3,887)
Long-term debt			3,887
Net			0
Capital leases [Member]
Supplemental Schedule of Non-cash Operating, Investing and Financing Activities [Abstract]
Property, plant and equipment and leasehold intangibles, net		5,791	18,236
Long-term debt		(5,791)	(18,236)
Net		0	0
Series of Individually Immaterial Business Acquisitions [Member]
Supplemental Schedule of Non-cash Operating, Investing and Financing Activities [Abstract]
Property, plant and equipment and leasehold intangibles, net	80,514	52,900	285,488
Net	88,682	57,948	204,137
Cash and escrow deposits-restricted			1,404
Prepaid expenses and other current assets			10,573
Other intangible assets, net	4,244	7,963	1,543
Other assets, net	3,955	(2,870)	40
Accrued expenses	(31)	(45)
Other liabilities			(2,900)
Long-term debt and capital and financing lease obligations			(92,011)
Horizon Bay Realty LLC [Member]
Supplemental Schedule of Non-cash Operating, Investing and Financing Activities [Abstract]
Property, plant and equipment and leasehold intangibles, net	8,132
Long-term debt	(1,821)
Additional paid-in-capital	(1,537)
Cash and escrow deposits-restricted	10,702
Accounts receivable, net	2,479
Accrued expenses	(15,141)
Other liabilities	(6,347)
Common stock	(1)
Accumulated earnings	(1,982)
Net	$ (5,516)