Summary of Significant Accounting Policies (Details 3) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment
Property, plant and equipment, gross	$ 650,656	$ 613,391
Less-accumulated depreciation	(154,882)	(134,970)
Property, plant and equipment, net	495,774	478,421
Depreciation expense	$ 31,800	30,800	$ 28,600
Land improvements
Property, Plant and Equipment
Estimated useful life	15 years
Land and land improvements
Property, Plant and Equipment
Property, plant and equipment, gross	$ 61,091	46,141
Buildings, building improvements and leasehold improvements
Property, Plant and Equipment
Property, plant and equipment, gross	$ 418,245	413,066
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	$ 26,458	17,379
Furniture, equipment and vehicles
Property, Plant and Equipment
Property, plant and equipment, gross	$ 144,862	$ 136,805
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	20 years