Basis of Financial Statement Presentation - ASC 606 Adjustment Other Comprehensive Income (Details) - USD ($) $ in Thousands		3 Months Ended
		Jun. 30, 2019	Jun. 30, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net income (loss)	[1],[2]	$ 40,340	$ 35,220
Foreign currency translation gains (losses)	[2]	3,179	(24,203)
Other comprehensive income (loss)	[2]	(1,400)	(28,652)
Total comprehensive income (loss)	[2]	$ 38,940	$ 6,568

[1]

[2]