Basis of Financial Statement Presentation - ASC 606 Adjustments Balance Sheets (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Mar. 31, 2018
Assets
Account receivable, net	$ 160,731	$ 146,561
Total current assets	650,718	678,953
Other assets	10,977	12,600
Total assets (1)	1,179,062	1,222,923
Liabilities and Stockholders' Equity
Accrued expenses	98,315	125,119
Total current liabilities	267,153	287,658
Deferred income taxes (non-current)	14,090	15,058
Other non-current obligations	129,034	152,249
Total liabilities	710,088	759,048
Retained earnings (deficit)	38,590	3,370
Accumulated other comprehensive income (loss)	(31,450)	(2,798)
Total stockholders’ equity (1)	468,974	463,875
Total liabilities and stockholders’ equity (1)	$ 1,179,062	1,222,923
As Previously Reported
Assets
Account receivable, net		144,076
Total current assets		676,468
Other assets		10,431
Total assets (1)		1,218,269
Liabilities and Stockholders' Equity
Accrued expenses		122,377
Total current liabilities		284,916
Deferred income taxes (non-current)		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 (1)		462,963
Total liabilities and stockholders’ equity (1)		1,218,269
Adjustments | Adjustments
Assets
Account receivable, net		2,485
Total current assets		2,485
Other assets		2,169
Total assets (1)		4,654
Liabilities and Stockholders' Equity
Accrued expenses		2,742
Total current liabilities		2,742
Deferred income taxes (non-current)		487
Other non-current obligations		513
Total liabilities		3,742
Retained earnings (deficit)		695
Accumulated other comprehensive income (loss)		217
Total stockholders’ equity (1)		912
Total liabilities and stockholders’ equity (1)		$ 4,654