Annual report pursuant to Section 13 and 15(d)

Organization and Significant Accounting Policies - Fair Value Measurement (Details)

v3.19.1
Organization and Significant Accounting Policies - Fair Value Measurement (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Mar. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Certificates of Deposit, at Carrying Value $ 32,200 $ 33,900
Money markets 60,687 83,891
Debt, Long-term and Short-term, Combined Amount 294,471 324,623
Recurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Money markets 60,687 83,891
Debt, Long-term and Short-term, Combined Amount 303,170 343,125
Level 1 | Recurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Money markets 60,687 83,891
Derivative Instruments in Hedges, Assets, at Fair Value 0 0
Derivative Instruments in Hedges, Liabilities, at Fair Value 0 0
Debt, Long-term and Short-term, Combined Amount 0 0
Level 2 | Recurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Money markets 0 0
Derivative Instruments in Hedges, Assets, at Fair Value 5,141  
Derivative Instruments in Hedges, Liabilities, at Fair Value 0 0
Debt, Long-term and Short-term, Combined Amount 303,170 343,125
Level 3 | Recurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Money markets 0 0
Derivative Instruments in Hedges, Assets, at Fair Value 0 0
Derivative Instruments in Hedges, Liabilities, at Fair Value 0 0
Debt, Long-term and Short-term, Combined Amount $ 0 0
Foreign Exchange Forward [Member] | Prepaid Expenses and Other Current Assets    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Asset, Fair Value, Gross Asset   $ 1,154