Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies - Additional Information (Detail)

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Commitments and Contingencies - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
0 Months Ended 12 Months Ended 1 Months Ended 3 Months Ended 0 Months Ended
Jul. 19, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Aug. 12, 2012
Jul. 31, 2012
Yardi Law Suit
Jun. 30, 2012
Yardi Law Suit
Jul. 19, 2012
Reimbursement Payment
Loss Contingencies [Line Items]                
Lease of office space and equipment under capital and operating leases, expiration year   2020            
Capital lease, average interest rate   2.20%            
Lease rent expense   $ 9.7 $ 8.4 $ 7.4        
License from Yardi, intangible asset           3.0    
License to Yardi, other revenue, deferred           1.0    
Settlement of all outstanding legal disputes             8.5  
Receipt of claim from primary insurance carrier 5.0             5.0
Policy coverage in excess of total coverage by different insurance carrier         $ 5.0