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Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
12 Months Ended
Nov. 30, 2018
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Property, Plant and Equipment [Line Items]        
Property, Plant and Equipment, Gross   $ 563,745 $ 550,922  
Less accumulated depreciation and amortization   318,388 299,907  
Property Plant and Equipment Excluding Capital Projects in Progress   245,357 251,015  
Capital projects in progress   9,240 22,005  
Property, plant and equipment, net   254,597 273,020  
Fully Depreciated Property, Plant and Equipment, Original Cost   196,800 189,900  
Proceeds from Sale of Property Held-for-sale $ 17,500      
Depreciation   33,300 27,300 $ 21,600
Software Development [Member]        
Property, Plant and Equipment [Line Items]        
Property, Plant and Equipment, Gross   39,100 20,500  
Capital projects in progress   3,600 12,200  
Land [Member]        
Property, Plant and Equipment [Line Items]        
Property, Plant and Equipment, Gross   30,034 33,087  
Buildings and site improvements        
Property, Plant and Equipment [Line Items]        
Property, Plant and Equipment, Gross   198,809 212,817  
Leasehold Improvements [Member]        
Property, Plant and Equipment [Line Items]        
Property, Plant and Equipment, Gross   4,826 4,684  
Machinery and equipment        
Property, Plant and Equipment [Line Items]        
Property, Plant and Equipment, Gross   $ 330,076 $ 300,334