Fair Value Measurements - Narratives (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2016	Jul. 01, 2016	Apr. 01, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt and Capital Lease Obligations	$ 22,774
Business Combination, Contingent Consideration, Liability, Current	0
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Convertible Debt, Fair Value Disclosures	161,200			$ 123,100
Debt and Capital Lease Obligations	22,800
TVN [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Combination, Contingent Consideration, Liability, Current			$ 8,000
Contingent consideration for TVN acquisition not yet paid	0
Cash Earnout [Member] | TVN [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Payments to Acquire Businesses	2,500	$ 3,500
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	(2,100)
Cash Earnout [Member] | TVN [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Payments for Previous Acquisition	2,500	3,500
Assumed Employee Equity Plans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Payments to Acquire Businesses		2,900
Assumed Employee Equity Plans [Member] | TVN [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Combination, Contingent Consideration, Liability, Current	$ 0
Contingent consideration for TVN acquisition not yet paid		$ 2,900