Long-Term Debt (Financial Debt Covenants) (Details)	6 Months Ended
	Jun. 30, 2012
Annual Operating Lease Commitment, Requirement	30,000,000
Maximum [Member]
Leverage Ratio (Consolidated Indebtedness/Consolidated Adj. EBITDA), Requirement	3.50
Fixed Charge Coverage Ratio (Consolidated Free Cash Flow/Consolidated Fixed Charges), Requirement	1.50
Minimum [Member]
Leverage Ratio (Consolidated Indebtedness/Consolidated Adj. EBITDA), Requirement	1.00
Fixed Charge Coverage Ratio (Consolidated Free Cash Flow/Consolidated Fixed Charges), Requirement	1.00