Basis of Financial Statement Presentation - ASC 606 Adjustments Balance Sheets (Details) - USD ($) $ in Thousands		Dec. 31, 2018	Mar. 31, 2018
Assets
Account receivable, net	[1]	$ 147,848	$ 146,561
Total current assets	[1]	655,838	678,953
Other assets	[1]	17,107	12,600
Total assets	[1]	1,231,257	1,222,923
Liabilities and Stockholders' Equity
Accrued expenses	[1]	98,279	125,119
Total current liabilities	[1]	274,797	287,658
Deferred Tax Liabilities, Net, Noncurrent	[1]	14,911	15,058
Other non-current obligations	[1]	125,856	152,249
Total liabilities	[1]	692,824	759,048
Retained earnings (deficit)	[1]	113,664	3,370
Accumulated other comprehensive income (loss)	[1]	(38,691)	(2,798)
Total stockholders’ equity	[1]	538,433	463,875
Total liabilities and stockholders’ equity	[1]	$ 1,231,257	1,222,923
As Previously Reported
Assets
Account receivable, net			144,076
Total current assets			676,468
Other assets			10,431
Total assets			1,218,269
Liabilities and Stockholders' Equity
Accrued expenses			122,377
Total current liabilities			284,916
Deferred income taxes			14,571
Other non-current obligations			151,736
Total liabilities			755,306
Retained earnings (deficit)			2,675
Accumulated other comprehensive income (loss)			(3,015)
Total stockholders’ equity			462,963
Total liabilities and stockholders’ equity			1,218,269
ASC 606 Adjustments | ASC 606 Adjustments
Assets
Account receivable, net			2,485
Total current assets			2,485
Other assets			2,169
Total assets			4,654
Liabilities and Stockholders' Equity
Accrued expenses			2,742
Total current liabilities			2,742
Deferred income taxes			487
Other non-current obligations			513
Total liabilities			3,742
Retained earnings (deficit)			695
Accumulated other comprehensive income (loss)			217
Total stockholders’ equity			912
Total liabilities and stockholders’ equity			$ 4,654

[1] Period ended March 31, 2018 adjusted due to the adoption of Accounting Standard Codification (“ASC”) 606, Revenue from Contracts with Customers (“ASC 606”). Refer to Note 1, “Basis of Financial Statement Presentation.”