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Income Taxes - Additional Information (Detail) (USD $)
 3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2013
Jun. 30, 2012
Dec. 31, 2012
Income Taxes [Line Items]        
Effective income tax rate   30.40% 31.60%  
Federal statutory rate   35.00%    
Gross deferred tax assets $ 75,400,000 $ 75,400,000   $ 77,200,000
Valuation allowance related to the foreign tax credit carryforwards 14,700,000 14,700,000   14,600,000
Accrued gross liabilities 636,000 636,000   636,000
Accrued interest and penalties for discontinued operations 433,000 433,000   418,000
Period of unrecognized tax benefits not expected to be recognized 12 months      
Liabilities associated with uncertain tax positions $ 1,100,000 $ 1,100,000   $ 1,100,000
Foreign Tax Authority [Member]
        
Income Taxes [Line Items]        
Period of tax credit   10 years    
Expiration period   2019