Stock-based Compensation (Tables)

12 Months Ended

Dec. 31, 2011

Stock-based Compensation [Abstract]

Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]

Non-vested restricted share awards outstanding under both the 2007 Long-term Incentive Plan and the 2006 Non-employee Director Stock Incentive Plan as of December 31, 2011 and changes during the year were as follows:

	Number of Shares		Weighted Average Grant Date Fair Value
Non-vested at December 31, 2010	790,490		$	55.73
Granted	192,250		105.85
Vested	(177,255	)	48.08
Forfeited	(30,936	)	78.02
Non-vested at December 31, 2011	774,549		$	69.03

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

The following table presents the change in outstanding stock options under the Plan and the Director Plan for the years ended December 31, 2011 and 2010. All options outstanding at December 31, 2011 are fully vested.

	Shares		Range of Exercise Prices	Weighted Average Exercise Price		Weighted Average Remaining Life	Average Intrinsic Value - Per Share
Balance as of December 31, 2010	55,442		$ 4.42 - 12.50	$	6.93	1.0	$	82.12
Options granted	—		—	—
Options exercised	(42,400	)	4.75 - 8.05	6.98
Options forfeited	—		—	—
Balance as of December 31, 2011	13,042		$ 4.42 - 12.50	$	6.77	1.7	$	107.18

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]

For the years ended December 31, 2011, 2010 and 2009, stock-based compensation expense recognized in the income statement is as follows (in thousands):

	2011		2010		2009
Cost of product sales and services	$	10,960	$	5,138	$	3,868
General and administrative	6,205		3,379		2,028
Total stock-based compensation expense	$	17,165	$	8,517	$	5,896