Annual report pursuant to Section 13 and 15(d)

Line of Credit - Additional Information (Detail)

v2.4.0.8
Line of Credit - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Mar. 07, 2014
Subsequent Event [Member]
Sep. 12, 2013
Twelfth Amendment [Member]
Guarantor
Line of Credit Facility [Line Items]      
Revolving credit facility $ 80    
Revolving credit facility, maturity date Dec. 31, 2014    
Revolving credit facility, interest rate above LIBOR 1.50%    
Revolving credit facility, interest rate description Amounts borrowed under our revolving line of credit bear interest, at our option, at either the prime lending rate established by JPMorgan Chase Bank, N.A. or LIBOR plus 1.5 percent    
Revolving credit facility, unused annual commitment fee 0.25%    
Number of new guarantors     2
Revolving credit facility, amount outstanding   0  
Total outstanding letters of credit   51.5  
Revolving credit facility, unused portion   28.5  
Line of credit covenant, current ratio 1.25%    
Line of credit covenant, debt to net worth 0.50%    
Line of credit covenant, Earnings before interest, taxes, depreciation and amortization (EBITDA) to interest expense ratio 4.00%    
Line of credit covenant, minimum net worth required $ 246.4