Quarterly report pursuant to Section 13 or 15(d)

Basis of Financial Statement Presentation - ASC 606 Adjustment Cash Flow (Details)

v3.10.0.1
Basis of Financial Statement Presentation - ASC 606 Adjustment Cash Flow (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
Depreciation and amortization $ 12,545 13,554 25,642 26,013
Change in deferred income taxes     578 (126)
Change in operating assets     (19,956) 20,586
Change in operating liabilities     (58,049) (34,639)
Other     (147) 190
Net cash provided by (used in) operating activities     32,999 39,749
Effect of foreign currency fluctuations on cash     $ (8,452) 1,980
As Previously Reported        
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]        
Net income (loss)   12,849   233,455
Depreciation and amortization       25,569
Change in deferred income taxes       (108)
Change in operating assets       21,080
Change in operating liabilities       (34,558)
Other       162
Net cash provided by (used in) operating activities       40,067
Effect of foreign currency fluctuations on cash       1,662
ASC 606 Adjustments | ASC 606 Adjustments        
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]        
Net income (loss)   $ (30)   (197)
Depreciation and amortization       444
Change in deferred income taxes       (18)
Change in operating assets       (494)
Change in operating liabilities       (81)
Other       28
Net cash provided by (used in) operating activities       (318)
Effect of foreign currency fluctuations on cash       $ 318