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Subsequent Event - Additional Information (Detail) (USD $)
In Millions, except Per Share data, unless otherwise specified
 3 Months Ended 6 Months Ended 1 Months Ended 1 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Jul. 31, 2012
Subsequent Event
Jul. 27, 2012
Subsequent Event
Revolving Credit Facility Amendment
Jul. 27, 2012
Subsequent Event
New Senior Secured Term Loan
Jul. 27, 2012
Subsequent Event
New Senior Secured Term Loan
Alternate Base Rate
Jul. 27, 2012
Subsequent Event
New Senior Secured Term Loan
Adjusted LIBOR Rate
Jul. 27, 2012
Subsequent Event
New Senior Secured Term Loan
Covenant Requirement
Jul. 27, 2012
Subsequent Event
New Senior Secured Term Loan
Covenant Requirement
if at any time EBITDA (as defined) is less than $34.0 million but equal to or greater than $30.0 million
Jul. 27, 2012
Subsequent Event
New Senior Secured Term Loan
Covenant Requirement
Maximum
Dec. 31, 2012
Subsequent Event
New Senior Secured Term Loan
Covenant Requirement
Maximum
Jul. 27, 2012
Subsequent Event
New Senior Secured Term Loan
Covenant Requirement
Minimum
Jul. 27, 2012
Subsequent Event
New Senior Secured Term Loan
LTB de Mexico, S.A. de C.V.
Subsequent Event [Line Items]                              
Senior Secured Term Loan Amount             $ 35.0                
Revolving credit facility commitment           175.0                  
Revolving credit facility, extended maturity date           Jul. 27, 2017                  
Revolving credit facility, maximum commitment under expansion option           225.0                  
Maturity date             Jul. 27, 2018                
Percentage of LTB de Mexico, S.A. de C.V. shares pledged as collateral                             65.00%
Interest rate margin               4.00% 5.00%            
Earnings before interest taxes depreciation and amortization required under term loan agreement                       34.0   30.0  
Maximum Indebtedness to EBITDA ratio                     3.0        
Maximum capital expenditures                         $ 7.5    
Fixed charge coverage ratio                           1.10  
Credit facility terms                   The Senior Secured Term Loan provides for other customary restrictions and events of default. Restrictions include limitations on additional indebtedness, acquisitions, investments and payment of dividends, among others. Further, the Senior Secured Term Loan provides that the Company maintain a minimum fixed charge coverage ratio of 1.10 to 1.00 for any four consecutive fiscal quarters ending after July 27, 2012.          
Date declared         Jul. 31, 2012                    
Dividend per share $ 0.025 $ 0.025 $ 0.075 $ 0.050 $ 0.025                    
Dividend payment date Aug. 15, 2012       Nov. 15, 2012                    
Date of record         Nov. 01, 2012