Annual report pursuant to Section 13 and 15(d)

Income Taxes - Additional Information (Detail)

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Income Taxes - Additional Information (Detail) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Schedule Of Income Taxes [Line Items]      
Valuation allowance reversal $ 9,200,000    
Deferred tax liability, net 31,334,000 28,551,000  
Deferred tax liability related to intangibles not amortizable for tax purposes 23,871,000 23,020,000  
Deferred tax asset related to net operating loss carryforwards 16,106,000 23,139,000  
Deferred tax liabilities, other 2,055,000 1,711,000  
Deferred tax assets operating loss carryforwards, federal 174,000,000    
Deferred tax assets operating loss carryforwards, state 6,900,000    
Operating losses carryforwards attributable to deductions originating from exercise of non-qualified employee stock options 136,600,000    
Current state and local tax expense (benefit) 1,886,000 1,568,000 225,000
Undistributed earnings related to foreign subsidiaries 1,600,000    
Income tax examinations and adjustments minimum year 3 years    
Rent Sentinel
      
Schedule Of Income Taxes [Line Items]      
Deferred tax liability, net 200,000    
Deferred tax liability related to intangibles not amortizable for tax purposes 1,800,000    
Deferred tax asset related to net operating loss carryforwards 2,100,000    
Deferred tax liabilities, other 100,000    
MyBuilding Inc.
      
Schedule Of Income Taxes [Line Items]      
Deferred tax liability, net 800,000    
Deferred tax liability related to intangibles not amortizable for tax purposes 1,200,000    
Deferred tax asset related to net operating loss carryforwards 300,000    
Deferred tax assets, other 100,000    
INDIA
      
Schedule Of Income Taxes [Line Items]      
Tax holiday in Philippines expiration year Mar. 31, 2011    
PHILIPPINES
      
Schedule Of Income Taxes [Line Items]      
Tax holiday in Philippines expiration year 2015    
Federal
      
Schedule Of Income Taxes [Line Items]      
Net operating loss carryforwards, expiration year 2020    
Income tax year no longer subject to examinations 2010    
State
      
Schedule Of Income Taxes [Line Items]      
Current tax liability $ 1,900,000    
Income tax year no longer subject to examinations 2009