Commitments and Contingencies (Details 2) - USD ($) $ in Thousands				12 Months Ended
		Nov. 17, 2017	Aug. 16, 2013	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2019
Contractual obligations
Contractual Obligation, Due in Next Fiscal Year	[1],[2]			$ 19,630
Contractual Obligation, Due in Second Year	[1],[2]			18,082
Contractual Obligation, Due in Third Year	[1],[2]			11,400
Contractual Obligation, Due in Fourth Year	[1],[2]			173,692
Contractual Obligation, Due in Fifth Year	[1],[2]			0
Contractual obligation	[1],[2]			$ 222,804
Terms of noncancellable license agreement, minimum (in years)				1 year
Rent expense					$ 5,200	$ 4,400
Property, plant and equipment cost, capitalization amount					40,300		$ 32,000
unrecognized tax benefit excluding foreign tax withholdings				$ 24,600
Other commitments
Contractual obligations
Contractual Obligation, Due in Next Fiscal Year	[1],[2]			234
Contractual Obligation, Due in Second Year	[1],[2]			234
Contractual Obligation, Due in Third Year	[1],[2]			0
Contractual Obligation, Due in Fourth Year	[1],[2]			0
Contractual Obligation, Due in Fifth Year	[1],[2]			0
Contractual obligation	[1],[2]			468
Software licenses
Contractual obligations
Contractual Obligation, Due in Next Fiscal Year	[1],[2],[3]			13,525
Contractual Obligation, Due in Second Year	[1],[2],[3]			11,977
Contractual Obligation, Due in Third Year	[1],[2],[3]			6,028
Contractual Obligation, Due in Fourth Year	[1],[2],[3]			0
Contractual Obligation, Due in Fifth Year	[1],[2],[3]			0
Contractual obligation	[1],[2],[3]			31,530
Retention bonus liability
Contractual obligations
Contractual Obligation, Due in Next Fiscal Year	[1],[2],[4]			3,499
Contractual Obligation, Due in Second Year	[1],[2],[4]			3,499
Contractual Obligation, Due in Third Year	[1],[2],[4]			3,000
Contractual Obligation, Due in Fourth Year	[1],[2],[4]			0
Contractual Obligation, Due in Fifth Year	[1],[2],[4]			0
Contractual obligation	[1],[2],[4]			9,998
Convertible notes
Contractual obligations
Contractual Obligation, Due in Next Fiscal Year	[1],[2]			0
Contractual Obligation, Due in Second Year	[1],[2]			0
Contractual Obligation, Due in Third Year	[1],[2]			0
Contractual Obligation, Due in Fourth Year	[1],[2]			172,500
Contractual Obligation, Due in Fifth Year	[1],[2]			0
Contractual obligation	[1],[2]			172,500
Interest payments related to convertible notes
Contractual obligations
Contractual Obligation, Due in Next Fiscal Year	[1],[2]			2,372
Contractual Obligation, Due in Second Year	[1],[2]			2,372
Contractual Obligation, Due in Third Year	[1],[2]			2,372
Contractual Obligation, Due in Fourth Year	[1],[2]			1,192
Contractual Obligation, Due in Fifth Year	[1],[2]			0
Contractual obligation	[1],[2]			8,308
Imputed financing obligation
Contractual obligations
Contractual Obligation, Due in Next Fiscal Year	[5]				5,677
Contractual Obligation, Due in Second Year	[5]				2,404
Contractual Obligation, Due in Third Year	[5]				0
Contractual Obligation, Due in Fourth Year	[5]				0
Contractual Obligation, Due in Fifth Year	[5]				0
Contractual obligation	[5]				8,081
Leases and other contractual obligations
Contractual obligations
Contractual Obligation, Due in Next Fiscal Year	[5]				5,333
Contractual Obligation, Due in Second Year	[5]				4,883
Contractual Obligation, Due in Third Year	[5]				4,960
Contractual Obligation, Due in Fourth Year	[5]				3,271
Contractual Obligation, Due in Fifth Year	[5]				968
Contractual obligation	[5]				19,415
Convertible notes | 1.125% Convertible Senior Notes due 2018
Contractual obligations
Face value			$ 138,000
Debt Instrument, Convertible, Remaining Discount Amortization Period			5 years
Convertible notes | 1.375% convertible notes
Contractual obligations
Face value		$ 172,500		$ 172,500	172,500
Debt Instrument, Convertible, Remaining Discount Amortization Period		5 years		3 years 1 month 6 days
Leasing Arrangement [Member]
Contractual obligations
Contractual Obligation, Due in Next Fiscal Year	[5]				11,010
Contractual Obligation, Due in Second Year	[5]				7,287
Contractual Obligation, Due in Third Year	[5]				4,960
Contractual Obligation, Due in Fourth Year	[5]				3,271
Contractual Obligation, Due in Fifth Year	[5]				968
Contractual obligation	[5]				$ 27,496

[1] For the Company’s lease commitments as of December 31, 2019, refer to Note 10, “Leases.”

[2] The above table does not reflect possible payments in connection with unrecognized tax benefits of approximately $24.6 million including $22.8 million recorded as a reduction of long-term deferred tax assets and $1.8 million in long-term income taxes payable, as of December 31, 2019. As noted below in Note 19, “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.

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

[4] In connection with the acquisitions of Northwest Logic in August 2019 and the Secure Silicon IP and Protocols business in December 2019, the Company is obligated to pay retention bonuses to certain employees subject to certain eligibility and acceleration provisions including the condition of employment.

[5] With respect to the imputed financing obligation, the main components of the difference between the amount reflected in the table above and the amount reflected on the consolidated balance sheet 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.