Summary of Significant Accounting Policies - Property, Plant and Equipment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 170,597	$ 156,654
Less Accumulated Depreciation	(61,410)	(53,503)
Property plant and equipment net excluding capitalized cost	109,187	103,151
Construction In Progress	566	5,477
Property, Plant and Equipment, net	109,753	108,628
Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 40,378	38,455
Estimated useful life	Indefinite
Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 42,004	39,715
Land Improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	20 years
Land Improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	50 years
Buildings [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 25,520	21,486
Estimated useful life	30 years
Furniture, Office and Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 34,053	32,544
Furniture, Office and Computer Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years
Furniture, Office and Computer Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	10 years
Machinery and Service Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 28,642	$ 24,454
Machinery and Service Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	5 years
Machinery and Service Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	20 years