Quarterly Financial Data - Summary of Quarterly Financial Data (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended						3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 LAMAR MEDIA CORP [Member]	Dec. 31, 2012 LAMAR MEDIA CORP [Member]	Dec. 31, 2011 LAMAR MEDIA CORP [Member]	Dec. 31, 2013 Adjusted [Member]	Sep. 30, 2013 Adjusted [Member]	Jun. 30, 2013 Adjusted [Member]	Mar. 31, 2013 Adjusted [Member]	Dec. 31, 2012 Adjusted [Member]	Sep. 30, 2012 Adjusted [Member]	Jun. 30, 2012 Adjusted [Member]	Mar. 31, 2012 Adjusted [Member]	Dec. 31, 2013 Adjusted [Member] LAMAR MEDIA CORP [Member]	Sep. 30, 2013 Adjusted [Member] LAMAR MEDIA CORP [Member]	Jun. 30, 2013 Adjusted [Member] LAMAR MEDIA CORP [Member]	Mar. 31, 2013 Adjusted [Member] LAMAR MEDIA CORP [Member]	Dec. 31, 2012 Adjusted [Member] LAMAR MEDIA CORP [Member]	Sep. 30, 2012 Adjusted [Member] LAMAR MEDIA CORP [Member]	Jun. 30, 2012 Adjusted [Member] LAMAR MEDIA CORP [Member]	Mar. 31, 2012 Adjusted [Member] LAMAR MEDIA CORP [Member]	Sep. 30, 2013 Previously Reported [Member]	Jun. 30, 2013 Previously Reported [Member]	Mar. 31, 2013 Previously Reported [Member]	Dec. 31, 2012 Previously Reported [Member]	Sep. 30, 2012 Previously Reported [Member]	Jun. 30, 2012 Previously Reported [Member]	Mar. 31, 2012 Previously Reported [Member]	Sep. 30, 2013 Previously Reported [Member] LAMAR MEDIA CORP [Member]	Jun. 30, 2013 Previously Reported [Member] LAMAR MEDIA CORP [Member]	Mar. 31, 2013 Previously Reported [Member] LAMAR MEDIA CORP [Member]	Dec. 31, 2012 Previously Reported [Member] LAMAR MEDIA CORP [Member]	Sep. 30, 2012 Previously Reported [Member] LAMAR MEDIA CORP [Member]	Jun. 30, 2012 Previously Reported [Member] LAMAR MEDIA CORP [Member]	Mar. 31, 2012 Previously Reported [Member] LAMAR MEDIA CORP [Member]
Interim Reporting [Line Items]
Net revenues	$ 1,245,842	$ 1,179,736	$ 1,130,714	$ 1,245,842	$ 1,179,736	$ 1,130,714	$ 320,352	$ 321,141	$ 327,744	$ 276,605	$ 306,639	$ 309,526	$ 301,106	$ 262,465	$ 320,352	$ 321,141	$ 327,744	$ 276,605	$ 306,639	$ 309,526	$ 301,106	$ 262,465	$ 323,184	$ 324,684	$ 283,479	$ 305,505	$ 306,286	$ 304,872	$ 266,238	$ 323,184	$ 324,684	$ 283,479	$ 305,505	$ 306,286	$ 304,872	$ 266,238
Net revenues less direct advertising expenses							210,390	211,501	217,021	170,086	200,440	205,681	196,035	159,042	210,390	211,501	217,021	170,086	200,440	205,681	196,035	159,042	213,544	213,961	176,960	199,306	202,441	199,801	162,815	213,544	213,961	176,960	199,306	202,441	199,801	162,815
Net (loss) income applicable to common stock	39,774	7,525	6,493				10,094	17,003	23,031	(10,354)	7,819	13,381	11,534	(25,209)									18,249	21,164	(6,161)	7,127	11,405	13,831	(22,907)
Net (loss) income	$ 40,139	$ 7,890	$ 6,858	$ 40,338	$ 8,115	$ 6,920									$ 10,228	$ 17,144	$ 23,178	$ (10,212)	$ 7,986	$ 13,561	$ 11,695	$ (25,127)								$ 18,390	$ 21,311	$ (6,019)	$ 7,294	$ 11,585	$ 13,992	$ (22,825)
Net (loss) income per common share basic	$ 0.42	$ 0.08	$ 0.07				$ 0.11	$ 0.18	$ 0.24	$ (0.11)	$ 0.08	$ 0.14	$ 0.13	$ (0.27)									$ 0.09	$ 0.22	$ (0.07)	$ 0.08	$ 0.12	$ 0.15	$ (0.25)
Net (loss) income per common share - diluted	$ 0.42	$ 0.08	$ 0.07				$ 0.11	$ 0.18	$ 0.24	$ (0.11)	$ 0.08	$ 0.14	$ 0.13	$ (0.27)									$ 0.09	$ 0.22	$ (0.07)	$ 0.08	$ 0.12	$ 0.15	$ (0.25)