Fair Value Measurements (Details Textuals) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Sensitivity Analysis of Fair Value, Impact of 1 Percent Increase or Decrease in Level 3 Inputs	$ 100,000		$ 100,000
Other Asset Impairment Charges	0	0	0	17,515,000
Long-term Debt, Fair Value	2,921,000,000		2,921,000,000		2,957,000,000
Faustina Investment Impairment [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Asset Impairment Charges				$ 15,100,000