Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities:
Net loss	$ (62,504)	$ (24,222)
Adjustments to reconcile net loss to cash provided by operating activities, net of the effects of acquisitions:
Depreciation and amortization	40,347	37,713
Loss on disposal of fixed assets	63	411
Deal-related compensation expense and accretion charges	38	38
Share-based compensation expense associated with equity awards	12,965	10,231
Impairment of intangible assets	35,871	0
Deferred income taxes	(14,306)	(8,564)
Other gains (losses)	(206)	616
Changes in assets and liabilities
Accounts receivable and unbilled costs	47,939	109,572
Due from related party	1,536	0
Inventories	(138)	(4,737)
Prepaid expenses and other assets	(3,426)	(1,152)
Accounts payable	(5,206)	(7,126)
Accrued compensation and other expenses	5,566	(20,787)
Due to related party	250	(22)
Income taxes payable	(1,882)	185
Deferred revenue	(31,387)	(39,521)
Net cash provided by operating activities	25,520	52,635
Cash flows from investing activities:
Purchase of marketable securities	(69,211)	(35,413)
Proceeds from maturity of marketable securities	41,573	47,318
Purchase of fixed assets	(6,468)	(3,297)
Decrease (increase) in deposits	4	(9)
Capitalized software development costs	0	(45)
Net cash (used in) provided by investing activities	(34,102)	8,554
Cash flows from financing activities:
Treasury stock repurchases	0	(100,000)
Tax withholding on restricted stock units	(3,486)	(5,381)
Net cash used in financing activities	(3,486)	(105,381)
Effect of exchange rate changes on cash and cash equivalents	(4,337)	1,048
Net decrease in cash and cash equivalents	(16,405)	(43,144)
Cash and cash equivalents and restricted cash, beginning of period	370,731	305,726
Cash and cash equivalents and restricted cash, end of period	354,326	262,582
Non-cash transactions:
Transfers of inventory to fixed assets	1,589	4,262
Additions to property, plant and equipment included in accounts payable	54	522
Tenant improvement allowance	$ 6,788	$ 0

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-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3213-108585

+ Details

Name:	us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash outflow associated with the development or modification of software programs or applications for internal use (that is, not to be sold, leased or otherwise marketed to others) that qualify for capitalization.

+ References

+ Details

Name:	us-gaap_PaymentsToDevelopSoftware
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash inflow associated with the aggregate amount received by the entity through sale or maturity of marketable securities (held-to-maturity or available-for-sale) during the period.

+ References

No definition available.

+ Details

Name:	us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

+ Details

Name:	us-gaap_ShareBasedCompensation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration