Stock-Based Compensation Expense Table (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Compensation cost included in statement of income for all stock-based compensation arrangements
Stock based compensation expense	$ 7,764	$ 6,787
Sales, marketing and administrative expense [Member]
Compensation cost included in statement of income for all stock-based compensation arrangements
Stock based compensation expense	7,186	6,424
Research and development expense [Member]
Compensation cost included in statement of income for all stock-based compensation arrangements
Stock based compensation expense	465	342
Cost of goods sold [Member]
Compensation cost included in statement of income for all stock-based compensation arrangements
Stock based compensation expense	$ 113	$ 21