Annual report pursuant to Section 13 and 15(d)

Income Taxes - Additional Information (Detail)

v2.4.0.8
Income Taxes - Additional Information (Detail) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Income Taxes [Line Items]      
Unrecognized tax benefits that would affect our effective tax rate if recognized $ 1,000,000 $ 1,000,000 $ 1,000,000
Unrecognized tax benefits decreased relating to acquisitions   27,000  
Unrecognized tax benefits increased relating to acquisitions     341,000
Addition in Unrecognized tax benefits except increase in accrued interest 0    
Accrued interest on uncertain tax benefits 45,000 41,000 181,000
Accrued interest related to uncertain tax positions, net of federal tax benefit 403,000 360,000 319,000
Valuation allowance       82,269,000
Net valuation allowance release   62,600,000  
Operating loss carryforwards, maturity date 2031    
Minimum [Member]
      
Income Taxes [Line Items]      
Year open to examination 2004    
Maximum [Member]
      
Income Taxes [Line Items]      
Year open to examination 2012    
Federal [Member]
      
Income Taxes [Line Items]      
Year open to examination 2009    
Net operating loss carryforwards 31,200,000    
State income tax [Member]
      
Income Taxes [Line Items]      
Net operating loss carryforwards $ 186,300,000    
State income tax [Member] | Minimum [Member]
      
Income Taxes [Line Items]      
Year open to examination 2008    
State income tax [Member] | Maximum [Member]
      
Income Taxes [Line Items]      
Year open to examination 2009