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Per station forfeiture proposed by FCC related to legal proceeding

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Total forfeiture proposed by FCC related to legal proceeding

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- Definition

Amount of letters of credit outstanding under debtor-in-possession financing arrangement.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Statement of Position (SOP)

-Number 90-7

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- Definition

Amount of asbestos claims paid in the current period, net of reinsurance recoveries.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Audit and Accounting Guide (AAG)

-Number AAG-PLI

-Chapter 4

-Paragraph 132, 133, 135, 136, 137

-IssueDate 2006-09-01

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-Publisher AICPA

-Name Statement of Position (SOP)

-Number 94-5

-Paragraph 11, 12

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 40

-Section 50

-Paragraph 3

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6482485&loc=d3e14764-158437

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The number of claims settled and dismissed during the period.

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 5

-Paragraph 9, 10, 11, 12

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The total number of new claims filed pertaining to a loss contingency during the period.

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The total amount of pending claims pertaining to a loss contingency accrual as of the balance sheet date.

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The amount of cash paid for the settlement of litigation or for other legal issues during the period.

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-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 27

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Commitments and Contingencies (Details) (USD $)	1 Months Ended	3 Months Ended	12 Months Ended
Commitments and Contingencies (Details) (USD $)	Mar. 31, 2006	Mar. 31, 2012 claims	Dec. 31, 2011 claims	Dec. 31, 2010	Mar. 31, 2011 claims
Commitments And Contingencies Details [Abstract]
Outstanding letters of credit and surety bonds		$ 395,000,000
Number of pending asbestos claims		48,650	50,090		52,230
Number of new asbestos claims		1,090
Number of asbestos claims closed or moved to inactive docket		2,530
Costs for settlement and defense of asbestos claims, net of insurance recoveries and tax benefits			33,000,000	14,000,000
Loss Contingencies [Abstract]
Forfeiture pending legal appeal	550,000
Per station forfeiture proposed by FCC for legal proceeding	32,500
Total forfeiture proposed by FCC for legal proceeding	$ 260,000