Commitments and Contingencies (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended	1 Months Ended		9 Months Ended	1 Months Ended		9 Months Ended
	Sep. 30, 2011 Y count segment component step	Mar. 31, 2011 Notices of proposed adjustments (NOPA)	Sep. 30, 2011 Purchase commitments entered in March 2011	Sep. 30, 2011 Purchase commitments enterd in July 2011	Dec. 31, 2011 Additional Sheepskin purchase agreement	Nov. 30, 2011 Additional Sheepskin purchase agreement	Sep. 30, 2011 Additional Sheepskin purchase agreement advance	Sep. 30, 2011 Purchase commitment acre
Commitments and Contingencies
Maximum indemnity period of claims for intellectual property (in years)	5
Commitments and Contingencies
Aggregate additional taxable income related to transfer pricing arrangements		$ 55,000
Additional federal taxes and penalties, excluding interest and penalties		27,000
Purchase of land for new headquarters facility in Goleta, California (in acres)								14
Aggregate purchase price as consideration of land								20,428
Purchase price subject to credit amount, if the close of the escrow period occurs before December 31, 2011								500
Remaining purchase commitments			6,000	30,000
Deposit under contractual agreement			10,000
Advance deposit made under contractual agreement				20,000			50,000
Total minimum commitment							158,000
Advance deposit per payment to be made under contractual agreement					$ 25,000	$ 25,000
Number of advance deposit payments							2