Quarterly report pursuant to Section 13 or 15(d)

Derivatives Fair Value (Details)

v3.10.0.1
Derivatives Fair Value (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Mar. 31, 2018
Foreign Exchange Forward [Member]          
Derivative Instrument Detail [Abstract]          
Derivative Liability, Fair Value, Gross Liability $ 1,903   $ 1,903   $ 1,154
Derivative Liability, Fair Value, Gross Asset 0   0   0
Derivative Liability, Fair Value, Amount Not Offset Against Collateral 1,903   1,903   1,154
Foreign Exchange Forward [Member] | Prepaid Expenses and Other Current Assets [Member]          
Derivative Instrument Detail [Abstract]          
Derivative Asset, Fair Value, Gross Asset 1,903   1,903   1,154
Derivative Asset, Fair Value, Gross Liability 30   30   0
Derivative Asset, Fair Value, Amount Not Offset Against Collateral 1,933   1,933   1,154
Foreign Exchange Forward [Member] | Accrued Liabilities [Member]          
Derivative Instrument Detail [Abstract]          
Derivative Liability, Fair Value, Gross Liability 0   0   0
Derivative Liability, Fair Value, Gross Asset (30)   (30)   0
Derivative Liability, Fair Value, Amount Not Offset Against Collateral (30)   (30)   0
Mexico, Pesos          
Derivatives, Fair Value [Line Items]          
Derivative, Notional Amount 71,300   71,300   $ 70,600
Sales [Member]          
Derivative Instrument Detail [Abstract]          
Derivative, Gain (Loss) on Derivative, Net 0 $ 0 0 $ 0  
Cost of sales          
Derivative Instrument Detail [Abstract]          
Derivative, Gain (Loss) on Derivative, Net (1,089) 1,104 (446) 45  
Operating Expense [Member]          
Derivative Instrument Detail [Abstract]          
Derivative, Gain (Loss) on Derivative, Net (1,089) 1,104 (446) 45  
Operating Income (Loss) [Member]          
Derivative Instrument Detail [Abstract]          
Derivative, Gain (Loss) on Derivative, Net $ (1,089) $ 1,104 $ (446) $ 45