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Indebtedness (Long-Term Debt) (Details) - USD ($)
$ in Thousands
Apr. 06, 2016
Mar. 31, 2017
Mar. 31, 2016
Debt Instrument [Line Items]      
Total   $ 89,746 $ 120,802
Less: current portion (included in Other liabilities)   (964) (1,139)
Long-term debt   88,782 119,663
Revolving credit agreement      
Debt Instrument [Line Items]      
Total   88,400 119,000
Other      
Debt Instrument [Line Items]      
Total   $ 1,346 $ 1,802
Fixed component [Member] | Revolving credit agreement | Weighted-average Overnight Federal Fund Rates [Member]      
Debt Instrument [Line Items]      
Basis spread on variable rate 0.50%