Condensed Consolidating Balance Sheet (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
ASSETS
Total current assets	$ 385,338	$ 314,253
Net property, plant and equipment	1,176,523	1,182,715
Total assets	3,946,077	3,898,884
Current liabilities:
Current maturities of long-term debt	17,471	33,916
Total current liabilities	260,569	277,324
Long-term debt, net of deferred financing costs	2,374,383	2,315,267
Total liabilities	2,874,972	2,829,356
Stockholders’ equity	1,071,105	1,069,528
Total liabilities and stockholders’ equity	3,946,077	3,898,884
LAMAR MEDIA CORP. AND SUBSIDIARIES [Member]
ASSETS
Total current assets	384,838	313,753
Net property, plant and equipment	1,176,523	1,182,715
Intangibles and goodwill, net	2,331,683	2,352,892
Other assets	36,629	33,120
Total assets	3,929,673	3,882,480
Current liabilities:
Current maturities of long-term debt	17,471	33,916
Other current liabilities	239,463	240,146
Total current liabilities	256,934	274,062
Long-term debt, net of deferred financing costs	2,374,383	2,315,267
Other noncurrent liabilities	240,020	236,765
Total liabilities	2,871,337	2,826,094
Stockholders’ equity	1,058,336	1,056,386
Total liabilities and stockholders’ equity	3,929,673	3,882,480
LAMAR MEDIA CORP. AND SUBSIDIARIES [Member] | Reportable Legal Entities [Member] | Lamar Media [Member]
ASSETS
Total current assets	15,951	13,886
Other assets	3,498,990	3,453,161
Total assets	3,514,941	3,467,047
Current liabilities:
Current maturities of long-term debt	17,471	33,916
Other current liabilities	39,397	38,904
Total current liabilities	56,868	72,820
Long-term debt, net of deferred financing costs	2,374,383	2,315,267
Other noncurrent liabilities	25,354	22,574
Total liabilities	2,456,605	2,410,661
Stockholders’ equity	1,058,336	1,056,386
Total liabilities and stockholders’ equity	3,514,941	3,467,047
LAMAR MEDIA CORP. AND SUBSIDIARIES [Member] | Reportable Legal Entities [Member] | Guarantor Subsidiaries [Member]
ASSETS
Total current assets	330,608	268,091
Net property, plant and equipment	1,153,544	1,161,205
Intangibles and goodwill, net	2,301,224	2,321,160
Other assets	10,982	10,379
Total assets	3,796,358	3,760,835
Current liabilities:
Other current liabilities	176,043	180,107
Total current liabilities	176,043	180,107
Other noncurrent liabilities	214,042	213,916
Total liabilities	390,085	394,023
Stockholders’ equity	3,406,273	3,366,812
Total liabilities and stockholders’ equity	3,796,358	3,760,835
LAMAR MEDIA CORP. AND SUBSIDIARIES [Member] | Reportable Legal Entities [Member] | Non-Guarantor Subsidiaries [Member]
ASSETS
Total current assets	38,279	31,776
Net property, plant and equipment	22,979	21,510
Intangibles and goodwill, net	30,459	31,732
Other assets	248	116
Total assets	91,965	85,134
Current liabilities:
Other current liabilities	24,023	21,135
Total current liabilities	24,023	21,135
Other noncurrent liabilities	57,874	53,609
Total liabilities	81,897	74,744
Stockholders’ equity	10,068	10,390
Total liabilities and stockholders’ equity	91,965	85,134
LAMAR MEDIA CORP. AND SUBSIDIARIES [Member] | Eliminations [Member]
ASSETS
Other assets	(3,473,591)	(3,430,536)
Total assets	(3,473,591)	(3,430,536)
Current liabilities:
Other noncurrent liabilities	(57,250)	(53,334)
Total liabilities	(57,250)	(53,334)
Stockholders’ equity	(3,416,341)	(3,377,202)
Total liabilities and stockholders’ equity	$ (3,473,591)	$ (3,430,536)