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Indebtedness (Long-Term Debt) (Details) - USD ($)
$ in Thousands
Sep. 30, 2017
Jul. 01, 2017
Mar. 31, 2017
Debt Instrument [Line Items]      
Total debt $ 129,165   $ 89,746
Less: current portion (5,756)   (964)
Long-term debt 123,409   88,782
Revolving credit agreement      
Debt Instrument [Line Items]      
Total debt 78,000   88,400
Term loan      
Debt Instrument [Line Items]      
Total debt 50,000   0
Minimum repayments of debt in next 12 months 5,000    
Unsecured revolving agreement      
Debt Instrument [Line Items]      
Total debt 3,584    
Other      
Debt Instrument [Line Items]      
Total debt 1,165   1,346
Other liabilities (current) | Unsecured revolving agreement      
Debt Instrument [Line Items]      
Total debt $ 3,366 $ 3,169 $ 3,387