Summary of Significant Accounting Policies (Details 3) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment
Property, plant and equipment, gross	$ 571,158,000	$ 531,676,000
Less-accumulated depreciation	(106,208,000)	(77,991,000)
Property, plant and equipment, net	464,950,000	453,685,000	366,046,000
Depreciation expense	28,600,000	25,000,000	18,200,000
Land
Property, Plant and Equipment
Property, plant and equipment, gross	47,677,000	38,104,000
Buildings, building improvements and leasehold improvements
Property, Plant and Equipment
Property, plant and equipment, gross	381,577,000	393,174,000
Buildings | Minimum
Property, Plant and Equipment
Estimated useful life	25 years
Buildings | Maximum
Property, Plant and Equipment
Estimated useful life	39 years
Building improvements | Minimum
Property, Plant and Equipment
Estimated useful life	10 years
Building improvements | Maximum
Property, Plant and Equipment
Estimated useful life	39 years
Buildings under construction
Property, Plant and Equipment
Property, plant and equipment, gross	32,609,000	4,302,000
Furniture, equipment and vehicles
Property, Plant and Equipment
Property, plant and equipment, gross	$ 109,295,000	$ 96,096,000
Furniture, equipment and vehicles | Minimum
Property, Plant and Equipment
Estimated useful life	3 years
Furniture, equipment and vehicles | Maximum
Property, Plant and Equipment
Estimated useful life	15 years