Annual report pursuant to Section 13 and 15(d)

Stock-based Expense - Additional Information (Detail)

v3.6.0.2
Stock-based Expense - Additional Information (Detail)
$ in Thousands
1 Months Ended 11 Months Ended 12 Months Ended
Aug. 24, 2011
Employee
shares
Jan. 31, 2014
Dec. 31, 2014
Dec. 31, 2016
USD ($)
shares
Dec. 31, 2015
USD ($)
shares
Dec. 31, 2014
USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock options granted (in shares) | shares       0    
Stock-based expense       $ 36,852 $ 38,122 $ 37,050
Tax benefit related to stock-based compensation expense       13,900 14,400 14,000
Unrecognized compensation cost       $ 42,900    
Unrecognized non-vested stock awards recognition period       1 year 9 months 18 days    
Cash proceeds from stock-based compensation arrangements       $ 28,500 12,100 9,900
Aggregate intrinsic value of stock options       $ 11,300 $ 5,000 $ 8,500
Forfeiture rate         0.00%  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate           0.00%
Stock Option            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock options vesting period (in years)   3 years 9 months 3 years      
Vesting percentage   75.00%        
Expiration period from grant date (in years)       10 years    
Percentage of stock options to be vested during remaining period   25.00%        
Market Based Restricted Stock | Minimum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Requisite service period (in months)       15 months 24 months  
Market Based Restricted Stock | Maximum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Requisite service period (in months)       33 months 30 months  
Time Based Restricted Stock            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock options vesting period (in years)   4 years 3 years      
Aggregate grant date fair value       $ 16,900 $ 21,500 $ 23,300
Common Stock            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock options granted (in shares) | shares       27,634,259 25,634,259  
Multifamily Technology Solutions, Inc | Stock Option            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock options granted (in shares) | shares 349,693          
Number of Employees | Employee 96          
Stock options vesting period (in years) 10 years          
Multifamily Technology Solutions, Inc | Vesting period 1 | Stock Option            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock options vesting period (in years) 4 years          
Vesting percentage 25.00%          
Multifamily Technology Solutions, Inc | Vesting period 2 | Stock Option            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock options vesting period (in years) 1 year          
Vesting percentage 20.00%          
Multifamily Technology Solutions, Inc | Vesting period 3 | Stock Option            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock options vesting period (in years) 4 years