GOODWILL AND INTANGIBLE ASSETS, NET (Details 2) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Intangible Assets, Net
Gross carrying amount	$ 165,668,000		$ 85,280,000
Accumulated amortization	(29,894,000)		(28,694,000)
Net book value	135,774,000		56,586,000
Amortization expense for definite lived intangible assets	1,200,000	1,340,000
2013	16,300,000
2014	24,200,000
2015	19,500,000
2016	16,100,000
2017	13,300,000
Trademarks
Intangible Assets, Net
Weighted average estimated useful life	16 years
Gross carrying amount	10,614,000		10,614,000
Accumulated amortization	(4,179,000)		(4,060,000)
Net book value	6,435,000		6,554,000
Customer-related intangible assets
Intangible Assets, Net
Weighted average estimated useful life	11 years
Gross carrying amount	118,754,000		38,366,000
Accumulated amortization	(19,123,000)		(18,567,000)
Net book value	99,631,000		19,799,000
Operating agreement
Intangible Assets, Net
Weighted average estimated useful life	20 years
Gross carrying amount	35,000,000		35,000,000
Accumulated amortization	(5,542,000)		(5,104,000)
Net book value	29,458,000		29,896,000
Non-compete agreement
Intangible Assets, Net
Weighted average estimated useful life	4 years
Gross carrying amount	1,300,000		1,300,000
Accumulated amortization	(1,050,000)		(963,000)
Net book value	$ 250,000		$ 337,000