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Reconciliation of Statutory Tax Rate to Effective Tax Rate (Detail)
9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Income Taxes [Line Items]    
Federal statutory rate 34.00% 34.00%
State statutory rate, net of Federal tax effect 7.20% 7.20%
Differences in taxable loss from GAAP income (20.60%) (20.40%)
Dividends paid deduction (14.80%) (19.60%)
Effective Tax Rate 5.80% 1.20%