XML 25 R57.htm IDEA: XBRL DOCUMENT v2.4.0.8
Line of Credit and Capital Lease Obligations - Additional Information (Detail) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2013
Letter of Credit [Member]
Dec. 31, 2013
Swingline Loans [Member]
Dec. 31, 2013
Federal Funds Rate [Member]
Dec. 31, 2013
Maximum [Member]
Libor [Member]
Dec. 31, 2013
Applicable Margin Rate [Member]
Maximum [Member]
Libor [Member]
Dec. 31, 2013
Applicable Margin Rate [Member]
Minimum [Member]
Libor [Member]
Dec. 31, 2013
Alternate Base Rate [Member]
Maximum [Member]
Libor [Member]
Dec. 31, 2013
Alternate Base Rate [Member]
Minimum [Member]
Libor [Member]
Line of Credit Facility [Line Items]                    
Line of Credit facility, borrowing capacity     $ 75,000,000 $ 37,500,000            
Line of Credit facility, estimated increase in borrowings 1,000,000,000                  
Debt instrument, interest rate         0.50%          
Debt instrument, interest rate, as defined in the Line of Credit           1.00% 0.75% 0.125% 1.75% 1.125%
Line of Credit facility, outstanding principal balance 27,000,000 144,000,000                
Line of Credit facility, reduction in the available balance 5,300,000                  
Letters of credit, weighted average interest rate 0.90%                  
Line of Credit facility, available balance 767,700,000                  
Capital lease obligations, amount due in 2014 100,000                  
Capital lease obligations, amount due in 2015 $ 100,000