Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash flows from operating activities:
Net loss	$ (10,264)	$ (246)
Adjustments to reconcile net loss to cash provided by operating activities, net of the effects of acquisitions:
Depreciation and amortization	80,581	51,797
Loss on disposal of fixed assets	58	222
Deal-related compensation expense and accretion charges	76	6,652
Share-based compensation expense associated with equity awards	19,802	12,098
Deferred income taxes	(25,328)	4,166
Other (gains) losses	(237)	61
Changes in assets and liabilities
Accounts receivable and unbilled costs	6,636	52,695
Due from related party	22,770	(28,878)
Inventories	239	7,168
Prepaid expenses and other assets	(7,773)	(36,751)
Accounts payable	4,414	(5,012)
Accrued compensation and other expenses	(14,041)	11,855
Due to related party	(2,579)	7,513
Income taxes payable	(2,096)	(107)
Deferred revenue	(18,657)	(76,290)
Net cash provided by operating activities	53,601	6,943
Cash flows from investing activities:
Purchase of marketable securities	(53,500)	(41,544)
Proceeds from maturity of marketable securities	86,853	65,720
Purchase of fixed assets	(15,748)	(9,113)
Purchase of intangible assets	(1,020)	(152)
Increase in deposits	(53)	(1)
Acquisition of businesses, net of cash acquired	(4,606)	27,748
Contingent purchase consideration	660	0
Collection of contingently returnable consideration	5,133	0
Change in restricted cash	(660)	0
Capitalized software development costs	(1,231)	0
Net cash provided by investing activities	15,828	42,658
Cash flows from financing activities:
Issuance of common stock under stock plans	1	1
Treasury stock repurchases	(83,215)	(184,995)
Proceeds from issuance of long-term debt, net of issuance costs	0	244,623
Excess tax benefit from share-based compensation awards	(1,373)	1,699
Net cash provided by (used in) financing activities	(84,587)	61,328
Effect of exchange rate changes on cash and cash equivalents	(130)	(283)
Net increase (decrease) in cash and cash equivalents	(15,288)	110,646
Cash and cash equivalents, beginning of period	210,711	104,893
Cash and cash equivalents, end of period	195,423	215,539
Non-cash transactions:
Transfers of inventory to fixed assets	4,928	1,688
Additions to property, plant and equipment included in accounts payable	362	31
Debt issuance costs settled through the issuance of additional debt	0	5,377
Issuance of common stock under employee stock plans	6,943	3,028
Contingent consideration related to acquisition, included in accrued other	660	0
Purchase of business
Non-cash transactions:
Noncash acquisition consideration	0	2,279,910
Contingently returnable consideration
Non-cash transactions:
Noncash acquisition consideration	$ 0	$ 25,701