Nature of Operations and Summary of Siginificant Accounting Policies (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Jun. 30, 2019
Mar. 31, 2020
Mar. 31, 2019
Mar. 31, 2018
Apr. 01, 2018
Loss Contingencies [Line Items]          
Deferred Revenue, Revenue Recognized   $ 48,602 $ 30,169    
Document Period End Date   Mar. 31, 2020      
Percentage of LIFO Inventory   25.30% 25.20%    
FIFO Inventory Amount   $ 16,937 $ 16,757    
Interest Costs, Capitalized During Period   428 495    
Interest Costs Incurred   40,279 45,015 $ 50,629  
Interest Paid, Including Capitalized Interest, Operating and Investing Activities   38,021 44,118 48,663  
Income Taxes Paid, Net   92,462 64,668 85,629  
Advertising Expense   12,652 10,691 10,886  
Proceeds from Income Tax Refunds   4,378 2,189 $ 7,747  
Revenue, Remaining Performance Obligation, Amount   $ 940,000      
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification     (5,637)    
Property, Plant and Equipment, Other Types [Member]          
Loss Contingencies [Line Items]          
Property, Plant and Equipment, Useful Life   20 years      
Minimum [Member]          
Loss Contingencies [Line Items]          
Finite-Lived Intangible Assets, Useful Life, Minimum   5 years      
Minimum [Member] | Land Improvements [Member]          
Loss Contingencies [Line Items]          
Property, Plant and Equipment, Useful Life   3 years      
Minimum [Member] | Building [Member]          
Loss Contingencies [Line Items]          
Property, Plant and Equipment, Useful Life   2 years      
Minimum [Member] | Machinery and Equipment [Member]          
Loss Contingencies [Line Items]          
Property, Plant and Equipment, Useful Life   2 years      
Minimum [Member] | Computer Equipment [Member]          
Loss Contingencies [Line Items]          
Property, Plant and Equipment, Useful Life   2 years      
Maximum [Member]          
Loss Contingencies [Line Items]          
Finite-Lived Intangible Assets, Useful Life, Minimum   20 years      
Maximum [Member] | Land Improvements [Member]          
Loss Contingencies [Line Items]          
Property, Plant and Equipment, Useful Life   40 years      
Maximum [Member] | Building [Member]          
Loss Contingencies [Line Items]          
Property, Plant and Equipment, Useful Life   50 years      
Maximum [Member] | Machinery and Equipment [Member]          
Loss Contingencies [Line Items]          
Property, Plant and Equipment, Useful Life   20 years      
Maximum [Member] | Computer Equipment [Member]          
Loss Contingencies [Line Items]          
Property, Plant and Equipment, Useful Life   20 years      
Assets [Member]          
Loss Contingencies [Line Items]          
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification $ 120,562        
Equity [Member]          
Loss Contingencies [Line Items]          
Cumulative Effect of New Accounting Principle in Period of Adoption         $ 5,637
Liability [Member]          
Loss Contingencies [Line Items]          
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification $ 120,562        
Expected recognition within the next year [Member]          
Loss Contingencies [Line Items]          
Revenue, Remaining Performance Obligation, Percentage   49.00%      
Expected recognition beyond the next year [Member] [Member]          
Loss Contingencies [Line Items]          
Revenue, Remaining Performance Obligation, Percentage   45.00%      
Accounting Standards Update 2016-01 [Member]          
Loss Contingencies [Line Items]          
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification [1]     $ (1,970)    
[1] As a result of the adoption of ASC 2016-01 we recorded a cumulative effect adjustment to our opening fiscal 2019 retained earnings balance that increased retained earnings and decreased accumulated other comprehensive income. See Note 1 titled, "Nature of Operations and Summary of Significant Accounting Policies" for further details.