Income Taxes Textuals (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income Tax Disclosure [Abstract]
Operating loss carryforwards, federal	$ 69,062,000
Operating loss carryforwards, state	61,493,000
Net operating losses, deferred tax asset, federal	11,302,000
Net operating losses, deferred tax asset, state	3,911,000
Net operating losses, unrecognized excess tax benefits, federal	57,760,000
Net operating losses, unrecognized tax benefits, state	33,108,000
Tax Benefit from Stock Options Exercised, Federal	3,956,000
Tax Benefit from Stock Options Exercised, State	228,000
Foreign tax credits	7,625,000
Foreign tax credits, APIC benefit	6,300,000
Current Foreign Tax Expense (Benefit)	7,586,000	267,000	0
Excess Tax Benefit from Share-based Compensation, Financing Activities	583,000	1,302,000	0
Reduction to net operating losses	10,000,000
Corrected deferred tax asset balance	$ 3,500,000