Commitments and Contingencies (Details 2) - USD ($) $ in Thousands			12 Months Ended
		Aug. 16, 2013	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Contractual obligations
Contractual Obligation, Due in Next Fiscal Year	[1]		$ 107,624
Contractual Obligation, Due in Second Year	[1]		18,184
Contractual Obligation, Due in Third Year	[1]		9,946
Contractual Obligation, Due in Fourth Year	[1]		7,211
Contractual Obligation, Due in Fifth Year	[1]		5,753
Contractual Obligation, Due after Fifth Year	[1]		174,557
Contractual Obligation	[1]		$ 323,275
Terms of noncancellable license agreement, minimum (in years)			1 year
Rent expense			$ 4,400	$ 3,800	$ 2,700
Property, Plant and Equipment Cost Capitalization Amount			40,320	40,320
Imputed financing obligation
Contractual obligations
Contractual Obligation, Due in Next Fiscal Year	[1],[2]		6,447
Contractual Obligation, Due in Second Year	[1],[2]		6,602
Contractual Obligation, Due in Third Year	[1],[2]		2,869
Contractual Obligation, Due in Fourth Year	[1],[2]		0
Contractual Obligation, Due in Fifth Year	[1],[2]		0
Contractual Obligation, Due after Fifth Year	[1],[2]		0
Contractual Obligation	[1],[2]		15,918
Leases and other contractual obligations
Contractual obligations
Contractual Obligation, Due in Next Fiscal Year	[1]		6,757
Contractual Obligation, Due in Second Year	[1]		5,678
Contractual Obligation, Due in Third Year	[1]		4,705
Contractual Obligation, Due in Fourth Year	[1]		4,839
Contractual Obligation, Due in Fifth Year	[1]		3,381
Contractual Obligation, Due after Fifth Year	[1]		865
Contractual Obligation	[1]		26,225
Software licenses
Contractual obligations
Contractual Obligation, Due in Next Fiscal Year	[1],[3]		10,450
Contractual Obligation, Due in Second Year	[1],[3]		3,532
Contractual Obligation, Due in Third Year	[1],[3]		0
Contractual Obligation, Due in Fourth Year	[1],[3]		0
Contractual Obligation, Due in Fifth Year	[1],[3]		0
Contractual Obligation, Due after Fifth Year	[1],[3]		0
Contractual Obligation	[1],[3]		13,982
Convertible notes
Contractual obligations
Contractual Obligation, Due in Next Fiscal Year	[1]		81,207
Contractual Obligation, Due in Second Year	[1]		0
Contractual Obligation, Due in Third Year	[1]		0
Contractual Obligation, Due in Fourth Year	[1]		0
Contractual Obligation, Due in Fifth Year	[1]		0
Contractual Obligation, Due after Fifth Year	[1]		172,500
Contractual Obligation	[1]		253,707
Interest payments related to convertible notes
Contractual obligations
Contractual Obligation, Due in Next Fiscal Year	[1]		2,763
Contractual Obligation, Due in Second Year	[1]		2,372
Contractual Obligation, Due in Third Year	[1]		2,372
Contractual Obligation, Due in Fourth Year	[1]		2,372
Contractual Obligation, Due in Fifth Year	[1]		2,372
Contractual Obligation, Due after Fifth Year	[1]		1,192
Contractual Obligation	[1]		13,443
Convertible notes | Senior, One Point One Two Five Percent Convertible Notes Due Two Thousand Eighteen [Member]
Contractual obligations
Face Value		$ 138,000	$ 81,207	$ 138,000
Debt Instrument, Convertible, Remaining Discount Amortization Period		5 years	8 months

[1] The above table does not reflect possible payments in connection with uncertain tax benefits of approximately $22.6 million including $20.4 million recorded as a reduction of long-term deferred tax assets and $2.2 million in long-term income taxes payable, as of December 31, 2017. As noted below in Note 16, “Income Taxes,” although it is possible that some of the unrecognized tax benefits could be settled within the next 12 months, the Company cannot reasonably estimate the outcome at this time.

[2] With respect to the imputed financing obligation, the main components of the difference between the amount reflected in the contractual obligations table and the amount reflected on the Consolidated Balance Sheets are the interest on the imputed financing obligation and the estimated common area expenses over the future periods. The amount includes the amended Ohio lease and the amended Sunnyvale lease.

[3] The Company has commitments with various software vendors for agreements generally having terms longer than one year.