Intangible Assets, Net (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2013	Dec. 31, 2012
Intangible assets, net
Accumulated amortization	$ (28,513)	$ (28,513)	$ (11,894)
Intangible assets, net	180,725	180,725	197,344
Amortization expense	5,020	8,975
Covenant not to compete
Intangible assets, net
Intangible assets	3,533	3,533	3,533
Trade names
Intangible assets, net
Intangible assets	9,820	9,820	9,820
Proprietary know how
Intangible assets, net
Intangible assets	34,650	34,650	34,650
Lease contract rights
Intangible assets, net
Intangible assets	80,235	80,235	80,235
Amortization expense	3,015	6,760
Management contract rights
Intangible assets, net
Intangible assets	$ 81,000	$ 81,000	$ 81,000