Quarterly report pursuant to Section 13 or 15(d)

Income Tax - Additional Information (Detail)

v2.4.0.8
Income Tax - Additional Information (Detail) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Dec. 31, 2013
Income Tax Holiday [Line Items]          
Unrealized gain recognized in OCI $ (33,000) $ 127,000 $ (46,000) $ (82,000)  
Deferred tax liability related to unrealized gain 693,000   693,000   1,799,000
Income tax benefit (expense) (830,000)   (770,000)    
Investments Available-for-sale [Member]
         
Income Tax Holiday [Line Items]          
Unrealized gain recognized in OCI 3,800,000        
Deferred tax liability related to unrealized gain 1,500,000   1,500,000    
TRS [Member]
         
Income Tax Holiday [Line Items]          
Deferred valuation allowance 800,000   800,000    
Income tax benefit (expense) 800,000 0 800,000 0  
Effective income tax rate reconciliation, at federal statutory income tax rate, Percent     35.00%    
Effective income tax rate reconciliation, State and local income taxes, Percent     5.00%    
Additional Paid-in Capital [Member] | TRS [Member]
         
Income Tax Holiday [Line Items]          
Tax impact on additional paid in capital $ 1,900,000   $ 1,900,000