Certain Financial Statement Information (Details 6) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012
Schedule of estimated future amortization expense of purchased intangible assets
2013 (remaining)	$ 1,016
2014	3,906
2015	3,621
2016	3,086
2017 and thereafter	1,379
Total	13,008
Cost of Sales [Member]
Schedule of estimated future amortization expense of purchased intangible assets
2013 (remaining)	680
2014	2,717
2015	2,717
2016	2,717
2017 and thereafter	1,379
Total	10,210
Operating Expenses [Member]
Schedule of estimated future amortization expense of purchased intangible assets
2013 (remaining)	336
2014	1,189
2015	904
2016	369
2017 and thereafter	0
Total	$ 2,798