Income Taxes (Details Textuals) (USD $)	Dec. 31, 2011	Dec. 31, 2010
Income Taxes [Abstract]
Current income taxes payable	$ 5,900,000	$ 22,500,000
Federal tax net operating loss carryforward	12,700,000
State tax net operating loss carryforward	48,500,000
Foreign tax net operating loss carryforward	4,600,000
Valuation allowances against our state loss carryforwards	2,700,000
Valuation allowances against our foreign loss carryforwards	2,000,000
Recorded tax liabilities for unrecognized gross tax benefits	2,500,000	2,300,000
Decrease in recorded tax liabilities for unrecognized gross tax benefits	1,500,000
Interest And Penalties Included In The Decrease In Liabilities For Unrecognized Tax Benefits	300,000
Accrued interest expense for uncertain tax positions	$ 400,000