Property, Plant and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property, plant and equipment - gross	$ 185,495	$ 203,531
Less accumulated depreciation and amortization, including accumulated amortization of capitalized leases	81,522	76,786
Total property, plant and equipment, net	103,973	126,745
Tangible Asset Impairment Charges	14,956	0	$ 0
Depreciation and amortization	13,917	14,429	$ 7,882
Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment - gross	14,826	17,054
Improvements To Land And Leaseholds [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment - gross	17,408	16,590
Buildings [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment - gross	33,910	39,366
Machinery And Equipment, Including Equipment Under Capitalized Leases [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment - gross	118,060	118,677
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment - gross	$ 1,291	$ 11,844