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Long Term Debt - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Line of Credit Facility [Line Items]      
Fixed interest rate for interest rate swap contract 3.39% 3.39% 3.39%
Interest rate swap, start date Mar. 30, 2011    
Interest rate swap, termination date Dec. 31, 2014    
Total indebtedness $ 51,745 $ 52,443  
Maximum
      
Line of Credit Facility [Line Items]      
Capacity to increase borrowings under credit agreement 148,450    
Term Loan
      
Line of Credit Facility [Line Items]      
Average line of credit facility outstanding 23,318 50,957  
Weighted average interest rate 3.80% 3.70%  
Secured Revolving Credit Facility
      
Line of Credit Facility [Line Items]      
Average line of credit facility outstanding $ 29,284 $ 0  
Weighted average interest rate 3.10% 0.00%