Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities:
Net loss	$ (29,343)	$ (62,504)
Adjustments to reconcile net loss to cash provided by operating activities, net of the effects of acquisitions:
Depreciation and amortization	29,335	40,347
Operating lease right-of-use assets	2,552	0
Loss on disposal of fixed assets	0	63
Deal-related compensation expense and accretion charges	0	38
Share-based compensation expense	12,743	12,965
Net change in fair value of contingent and contractual liabilities	541	0
Accretion of contingent consideration	(18)	0
Impairment of intangible assets	0	35,871
Deferred income taxes	830	(14,306)
Other gains	(81)	(206)
Changes in assets and liabilities
Accounts receivable and unbilled costs	75,092	47,939
Due from related party	0	1,536
Inventories	(1,208)	(138)
Prepaid expenses and other assets	4,238	(3,426)
Accounts payable	(634)	(5,206)
Accrued compensation and other expenses	(16,332)	5,566
Operating lease liabilities	(3,425)
Due to related party	0	250
Income taxes payable	85	(1,882)
Deferred revenue	(24,917)	(31,387)
Net cash provided by operating activities	49,458	25,520
Cash flows from investing activities:
Purchase of marketable securities	(41,039)	(69,211)
Proceeds from maturity of marketable securities	28,995	41,573
Purchase of fixed assets	(3,287)	(6,468)
Decrease in deposits	0	4
Acquisition of businesses	(4,154)	0
Net cash used in investing activities	(19,485)	(34,102)
Cash flows from financing activities:
Repayment of long-term debt	(50,000)	0
Treasury stock repurchases	(30,708)	0
Tax withholding on restricted stock units	(3,012)	(3,486)
Net cash used in financing activities	(83,720)	(3,486)
Effect of exchange rate changes on cash and cash equivalents	(1,163)	(4,337)
Net decrease in cash and cash equivalents and restricted cash	(54,910)	(16,405)
Cash and cash equivalents and restricted cash, beginning of period	409,820	370,731
Cash and cash equivalents and restricted cash, end of period	354,910	354,326
Supplemental disclosures:
Cash paid for interest	5,639	5,412
Cash paid for income taxes	3,211	3,882
Non-cash transactions:
Transfers of inventory to fixed assets	862	1,589
Additions to property, plant and equipment included in accounts payable	794	54
Tenant improvement allowance	0	6,788
Contingent consideration related to acquisition, included in accrued other	1,000	0
Unsettled share repurchases, included in accounts payable	$ 2,469	$ 0