Commitments And Contingencies (Narrative) (Details)	6 Months Ended
	Jun. 30, 2014 permits signs
Los Angeles Litigation [Abstract]
Lawsuit date	2008-12-31
Settlement agreement date	2006-11-30
Ruling date	2010-01-31
Conversion from static to digital	83
Upholding date	2012-12-10
Review request date	2013-01-22
Review denial date	2013-02-27
Invalidation date	2013-04-12
Digital modernization permits issued to Company	82
Digital modernization permits issued to competitor	13
Turn off date	2013-04-15
Further proceedings conducted date	2013-04-16