Summary of Significant Accounting Policies - Additional Information (Details) (USD $) Share data in Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Amortization Expense:
Amortization Expense	$ 75,400,000	$ 87,400,000
Marketing and Advertising Expense:
Advertising Expense	1,200,000	4,100,000
Concentration Risk:
Sales Contract Term	12 months
Fair Value of Financial Instruments
Transfers of Assets or Liabilities Into or Out of Levels 1, 2, or 3	0		0
New prouncements, effect of adoption	0
Stock Compensation Plan
Earnings (loss) per share:
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	2.2	2.7
Credit Concentration Risk | Advertising Revenue Local Businesses
Concentration Risk:
Concentration of Credit Risk	85.00%
Credit Concentration Risk | Advertising Revenue Large Regional Chains
Concentration Risk:
Concentration of Credit Risk	15.00%
Interest Expense
Interest Expense, Net:
Amortization of the Fair Value Adjustment	$ 4,900,000	$ 7,500,000