Income Taxes (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Operating Loss Carryforwards [Line Items]
Income tax, one time charge	$ 80,396,000	$ 67,175,000	$ 30,323,000
Estimated undistributed earnings from non-United States subsidiaries	9,200,000
Operating loss carryforwards, not subject to expiration	13,000,000
Valuation allowance	30,955,000	29,389,000
Accrued Interest and penalties related to uncertain tax positions	7,700,000	5,500,000
Interest and penalties expense related to uncertain tax positions	600,000	1,200,000
One Time Charge [Member]
Operating Loss Carryforwards [Line Items]
Income tax, one time charge	5,600,000
Scenario, Forecast [Member]
Operating Loss Carryforwards [Line Items]
Estimated decrease in unrecognized tax benefits	600,000
Investor [Member]
Operating Loss Carryforwards [Line Items]
Uncertain tax benefits that would impact effective tax rate	8,500,000	8,900,000
Unrecognized Tax Benefits, that Would Not Impact Effective Tax Rate	44,100,000	10,400,000
Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	63,200,000
Operating loss carryforwards, subject to expiration	25,800,000
State [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	108,600,000
Operating loss carryforwards, subject to expiration	111,200,000
Foreign [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	25,200,000
Capital and Net Operating Losses Expected to Expire [Member]
Operating Loss Carryforwards [Line Items]
Change in valuation allowance	13,100,000
Reduction of Acquired Net Operating Loss and Credit Carryforwards [Member]
Operating Loss Carryforwards [Line Items]
Change in valuation allowance	$ (11,600,000)