Geographic and Significant Customer Information (Details 1) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Long-lived tangible assets
Total long-lived tangible assets	$ 42,203	$ 35,521
United States [Member]
Long-lived tangible assets
Long-lived tangible assets	40,128	33,127
China [Member]
Long-lived tangible assets
Long-lived tangible assets, other countries	30	36
Israel [Member]
Long-lived tangible assets
Long-lived tangible assets, other countries	124	115
Japan [Member]
Long-lived tangible assets
Long-lived tangible assets, other countries	187	159
South Korea [Member]
Long-lived tangible assets
Long-lived tangible assets, other countries	556	503
All other [Member]
Long-lived tangible assets
Long-lived tangible assets, other countries	$ 1,178	$ 1,581