Income Tax Expense and Deferred Tax Narrative (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Income Tax Expense (Benefit) [Abstract]
Deferred tax liability on unremitted earnings of foreign subsidiary	$ (7,596,000)	$ (4,746,000)
Foreign subsidiary earnings	38,600,000
Unremitted Earnings Of Foreign Subsidiaries Related To Non Payment Of Withholding Taxes	490,800,000	371,000,000
US Federal Net Operating Loss Carryforwards	700,000
US Statutory Net Operating Loss Carryforwards	89,600,000
Charitable Contribution Carryforwards	23,300,000
Foreign tax credit carryforwards	5,000,000
Valuation Allowance On Statutory Net Operating Loss And Charitable Contribution Carryforwards	9,100,000
Foreign Deferred Tax Assets On Foreign Net Operating Loss Carryforwards	11,400,000
Foreign Net Operating Loss Carryforwards	43,800,000
Valuation Allowance On Foreign Net Operating Loss Carryforwards	7,700,000
Valuation allowance	25,900,000
Net Deferred Tax Assets	36,700,000
Amount Of Net Deferred Tax Assets Located In Foreign Jurisdictions	11,900,000
Pre Tax Profit Required To Realize Net Deferred Tax Assets	47,400,000
Amount of Net Deferred Tax Assets Related To Estimated Liabilities For Uncertain Tax Positions	3,800,000
Taxable Income Required To Realize Deferred Tax Assets Related To Estimated Liabilities For Uncertain Tax Positions	15,200,000
Equity Increase If Deferred Tax Assets Are Realized	$ 11,800,000