Quarterly report pursuant to Section 13 or 15(d)

Income Taxes - Additional Information (Detail)

v2.4.0.8
Income Taxes - Additional Information (Detail)
3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Income Taxes [Line Items]        
Statutory federal corporate income tax rate 35.00% 35.00% 35.00% 35.00%
Tax-sharing agreement [Member]
       
Income Taxes [Line Items]        
Percentage of tax-sharing agreement     43.50%  
Agreement termination date     Oct. 31, 2013