Accrued Expenses (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Accrued Expenses [Abstract]
Royalties, certain third party product costs and licenses	$ 40,517	$ 20,733
Other	62,864	63,942
Total accrued expenses	$ 103,381	$ 84,675
Maximum percentage accounted by individual expenses of total current liabilities	5.00%