XML 40 R29.htm IDEA: XBRL DOCUMENT  v2.3.0.11

Long-Term Debt (Details 1) (USD $)	6 Months Ended
	Jun. 30, 2011
September 30, 2012 - March 31, 2014 [Member] | Term Loan A-1 Facility[ Member]
Principal Payment of term loan
Principal amount	$ 6,750,000
September 30, 2012 - March 31, 2014 [Member] | Term Loan A-2 Facility [Member]
Principal Payment of term loan
Principal amount	750,000
September 30, 2012 - March 31, 2014 [Member] | Term B Facility [Member]
Principal Payment of term loan
Principal amount	1,030,600
June 30, 2014 - March 31, 2015 [Member] | Term Loan A-1 Facility[ Member]
Principal Payment of term loan
Principal amount	13,500,000
June 30, 2014 - March 31, 2015 [Member] | Term Loan A-2 Facility [Member]
Principal Payment of term loan
Principal amount	1,500,000
June 30, 2014 - March 31, 2015 [Member] | Term B Facility [Member]
Principal Payment of term loan
Principal amount	1,030,600
June 30, 2015 - September 30, 2015 [Member] | Term Loan A-1 Facility[ Member]
Principal Payment of term loan
Principal amount	37,125,000
June 30, 2015 - September 30, 2015 [Member] | Term Loan A-2 Facility [Member]
Principal Payment of term loan
Principal amount	4,125,000
June 30, 2015 - September 30, 2015 [Member] | Term B Facility [Member]
Principal Payment of term loan
Principal amount	1,030,600
December 31, 2015 [Member] | Term Loan A-1 Facility[ Member]
Principal Payment of term loan
Principal amount	74,250,000
December 31, 2015 [Member] | Term Loan A-2 Facility [Member]
Principal Payment of term loan
Principal amount	8,250,000
December 31, 2015 [Member] | Term B Facility [Member]
Principal Payment of term loan
Principal amount	1,030,600
March 31, 2016 - September 30, 2016 [Member] | Term Loan A-1 Facility[ Member]
Principal Payment of term loan
Principal amount	0
March 31, 2016 - September 30, 2016 [Member] | Term Loan A-2 Facility [Member]
Principal Payment of term loan
Principal amount	0
March 31, 2016 - September 30, 2016 [Member] | Term B Facility [Member]
Principal Payment of term loan
Principal amount	1,030,600
December 31, 2016 [Member] | Term Loan A-1 Facility[ Member]
Principal Payment of term loan
Principal amount	0
December 31, 2016 [Member] | Term Loan A-2 Facility [Member]
Principal Payment of term loan
Principal amount	0
December 31, 2016 [Member] | Term B Facility [Member]
Principal Payment of term loan
Principal amount	$ 385,456,200

X

- Definition

Principal Payment of term loan.

+ Details

Name:	lamr_PrincipalPaymentOfTermLoanAbstract
Namespace Prefix:	lamr
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of the required periodic payments applied to principal. (Consider the frequency of payment.)

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 22
-Article 5

+ Details

Name:	us-gaap_DebtInstrumentPeriodicPaymentPrincipal
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration