Business Acquisition - Allocation of Net Tangible and Intangible Assets (Details) - USD ($) $ in Thousands			3 Months Ended	9 Months Ended
		Feb. 29, 2016	Jul. 01, 2016	Sep. 30, 2016	Dec. 31, 2015
Business Combination, Separately Recognized Transactions [Line Items]
Goodwill				$ 239,880	$ 197,781
TVN [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Cash and cash equivalents				6,843
Accounts receivable, net				14,933
Inventories				3,462
Prepaid expenses and other current assets				2,412
Property and equipment, net				9,942
French R&D tax credit receivables (1)	[1]			26,421
Other long-term assets				2,134
Total assets				66,147
Other debts and capital leases, current				8,362
Accounts payable				12,494
Deferred revenue				2,504
Accrued liabilities				18,365
Other debts and capital leases, long-term				16,087
Other long-term liabilities				6,467
Deferred tax liabilities				2,126
Total liabilities				66,405
Goodwill				41,670
Intangibles				41,100
Total Purchase Consideration		$ 84,600	$ 82,500	$ 82,512

[1] (1) See Note 8, “Balance Sheet Components-Prepaid expenses and other current assets” for more information on French R&D tax credit receivables.