Quarterly report pursuant to Section 13 or 15(d)

Basis of Financial Statement Presentation - ASC 606 Adjustment Other Comprehensive Income (Details)

v3.10.0.1
Basis of Financial Statement Presentation - ASC 606 Adjustment Other Comprehensive Income (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]        
Net income (loss) $ 37,141 $ 12,819 $ 72,361 $ 233,258
Foreign currency translation gains (losses) (3,149) 9,020 (27,352) 13,373
Other comprehensive income (loss) 2,242 6,247 (26,410) 17,222
Total comprehensive income (loss) (1) $ 39,383 19,066 $ 45,951 250,480
As Previously Reported        
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]        
Net income (loss)   12,849   233,455
Foreign currency translation gains (losses)   9,068   13,206
Other comprehensive income (loss)   6,295   17,055
Total comprehensive income (loss) (1)   19,144   250,510
ASC 606 Adjustments | ASC 606 Adjustments        
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]        
Net income (loss)   (30)   (197)
Foreign currency translation gains (losses)   (48)   167
Other comprehensive income (loss)   (48)   167
Total comprehensive income (loss) (1)   $ (78)   $ (30)