Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Apr. 03, 2015
Cash flows from operating activities:
Net income	$ 21,767	$ 21,770	$ 39,891
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	200,686	193,086	179,542
Amortization of intangible assets	45,236	48,990	41,891
Deferred income taxes	(218)	(5,003)	12,420
Stock-based compensation expense	55,775	47,510	39,353
Loss on disposition of fixed assets	35,431	33,960	31,997
Other non-cash adjustments	10,018	8,957	4,778
Increase (decrease) in cash resulting from changes in operating assets and liabilities, net of effects of acquisitions:
Accounts receivable	16,071	(26,342)	3,745
Inventories	(12,386)	(26,749)	(1,217)
Other assets	(15,259)	(3,335)	(16,328)
Accounts payable	972	5,250	862
Accrued liabilities	48,039	(337)	20,017
Other liabilities	5,166	(820)	(7,435)
Net cash provided by operating activities	411,298	296,937	349,516
Cash flows from investing activities:
Purchase of property, equipment and satellites	(514,692)	(377,894)	(366,492)
Investment in unconsolidated affiliate	(140,378)	(1,258)
Cash paid for patents, licenses and other assets	(70,966)	(72,731)	(52,686)
Payments related to acquisition of businesses, net of cash acquired	(16,528)	(4,402)	(57,376)
Proceeds from sale of real property	27,559
Net cash used in investing activities	(715,005)	(456,285)	(476,554)
Cash flows from financing activities:
Payment of debt issuance costs	(6,677)	(840)	(2,757)
Proceeds from issuance of common stock under equity plans	22,403	22,309	23,202
Purchase of common stock in treasury (immediately retired) related to tax withholdings for stock-based compensation	(21,670)	(16,397)	(14,788)
Proceeds from common stock issued in public offering, net of issuance costs	503,061
Other financing activities	(1,802)	(1,784)	(3,107)
Net cash provided by financing activities	392,784	149,122	121,464
Effect of exchange rate changes on cash	(1,067)	51	(510)
Net increase (decrease) in cash and cash equivalents	88,010	(10,175)	(6,084)
Cash and cash equivalents at beginning of fiscal year	42,088	52,263	58,347
Cash and cash equivalents at end of fiscal year	130,098	42,088	52,263
Supplemental information:
Cash paid for interest (net of amounts capitalized)	10,094	21,787	29,645
Cash paid for income taxes, net	1,468	1,380	494
Non-cash investing and financing activities:
Issuance of stock in satisfaction of certain accrued employee compensation liabilities	13,080	11,609	10,194
Capital expenditures not paid for	29,813	60,796	6,584
Issuance of common stock in connection with acquisition	4,988
Revolving Credit Facility [Member]
Cash flows from financing activities:
Proceeds from credit facility borrowings	90,000	175,000	350,000
Payments of revolving credit facility borrowings	(270,000)	(205,000)	(245,000)
Ex-Im Credit Facility [Member]
Cash flows from financing activities:
Proceeds from credit facility borrowings	77,469	175,834	$ 13,914
Non-cash investing and financing activities:
Exposure fees on Ex-Im credit facility expected to be financed through Ex-Im credit facility	$ 8,505	$ 20,992