- Accounting Pronouncements Recently Adopted (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017	Mar. 31, 2018	Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net cash provided by financing activities			$ 4	$ 6,173
Net cash provided by operating activities			$ (57,217)	3,228
Best estimated selling price on upgrade rights			$ 0.99
Revenue	$ 299,344	$ 353,299	$ 547,209	652,241
Accounts receivable, net	242,038		242,038			$ 406,019
Deferred revenue	28,116		28,116			35,504
Deferred Revenue	32,835		32,835		$ 36,448	42,432
Accrued liabilities	377,058		377,058			452,137
Accumulated deficit	(332,384)		(332,384)			(132,112)
Accounting Standards Update 2014-09 [Member] | Accrued liabilities [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reserves and accruals, returns and allowances	75,000		$ 75,000
Accounting Standards Update 2014-09 [Member] | Accounts Receivable [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reserves and accruals, returns and allowances						$ 109,900
Accounting Standards Update 2016-09 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net cash provided by operating activities				25,500
Minimum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Estimated selling price			$ 1
Maximum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Estimated selling price			$ 3
Subscription-based Premium Services [Member] | Customer Concentration Risk [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Concentration risk, percentage			1.00%
Advertising Barter Transactions [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Nonmonetary transaction, advertising credit utilized during the period	1,000	$ 200	$ 1,100	$ 300
Under ASC 605 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue	298,783		545,834
Accounts receivable, net	167,042		167,042
Deferred revenue	33,789		33,789
Accrued liabilities	302,734		302,734
Impact [Member] | Accounting Standards Update 2016-09 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue	561		1,375
Accounts receivable, net	74,996		74,996
Deferred revenue	(954)		(954)
Accrued liabilities	74,324		74,324
Three Months Ended Under ASC 605 [Member] | Under ASC 605 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accumulated deficit	(332,945)		(332,945)
Three Month Ended Impact under 606 [Member] | Impact [Member] | Accounting Standards Update 2016-09 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accumulated deficit	561		561
Six Months Ended Under ASC 605 [Member] | Under ASC 605 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accumulated deficit	(333,759)		(333,759)
Six Month Ended Impact under 606 [Member] | Impact [Member] | Accounting Standards Update 2016-09 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accumulated deficit	$ 1,375		$ 1,375