Consolidated Statements of Cash Flows - USD ($)	9 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Cash flows from operating activities:
Net loss	$ (10,090,000)	$ (92,535,000)
Adjustments to reconcile net loss to cash provided by operating activities, net of the effects of acquisitions:
Depreciation and amortization	87,397,000	106,509,000
Operating lease right-of-use assets	7,872,000
Loss on divestiture of business	0	7,390,000
Loss on disposal of fixed assets	16,000	181,000
Deal-related compensation expense and accretion charges	0	102,000
Share-based compensation expense	39,961,000	44,142,000
Net change in fair value of contingent and contractual liabilities	541,000	0
Accretion of contingent consideration	(24,000)	(64,000)
Impairment of intangible assets	0	35,871,000
Deferred income taxes	(8,480,000)	(27,667,000)
Other losses (gains)	35,000	(206,000)
Changes in assets and liabilities
Accounts receivable and unbilled costs	(9,554,000)	(33,928,000)
Due from related party	0	171,000
Inventories	(1,233,000)	2,683,000
Prepaid expenses and other assets	10,957,000	5,582,000
Accounts payable	(4,647,000)	582,000
Accrued compensation and other expenses	16,009,000	28,385,000
Operating lease liabilities	(9,690,000)
Due to related party	0	232,000
Income taxes payable	24,000	(1,754,000)
Deferred revenue	(1,304,000)	(6,162,000)
Net cash provided by operating activities	117,790,000	69,514,000
Cash flows from investing activities:
Purchase of marketable securities	(89,840,000)	(184,104,000)
Proceeds from sales and maturity of marketable securities	108,413,000	155,346,000
Purchase of fixed assets	(15,207,000)	(19,462,000)
Payments related to the divestiture of business	0	(2,911,000)
Increase in deposits	(29,000)	(97,000)
Acquisition of businesses	(4,154,000)	0
Capitalized software development costs	0	(132,000)
Net cash used in investing activities	(817,000)	(51,360,000)
Cash flows from financing activities:
Issuance of common stock under stock plans	2,000	2,000
Payment of contingent consideration	0	(2,851,000)
Repayment of long-term debt	(100,000,000)	0
Treasury stock repurchases	(125,000,000)	0
Tax withholding on restricted stock units	(11,612,000)	(11,415,000)
Net cash used in financing activities	(236,610,000)	(14,264,000)
Effect of exchange rate changes on cash and cash equivalents	(1,523,000)	(5,380,000)
Net decrease in cash and cash equivalents and restricted cash	(121,160,000)	(1,490,000)
Cash and cash equivalents and restricted cash, beginning of period	409,820,000	370,731,000
Cash and cash equivalents and restricted cash, end of period	288,660,000	369,241,000
Supplemental disclosures:
Cash paid for interest	14,019,000	17,410,000
Cash paid for income taxes	10,494,000	9,150,000
Non-cash transactions:
Transfers of inventory to fixed assets	2,290,000	2,152,000
Additions to property, plant and equipment included in accounts payable	119,000	1,190,000
Tenant improvement allowance	0	10,171,000
Issuance of common stock under employee stock plans	6,593,000	7,575,000
Contingent consideration related to acquisition, included in accrued other	1,000,000	0
Fair value of contingent consideration received as partial consideration for divestiture of business	$ 0	$ 2,257,000