Annual report pursuant to Section 13 and 15(d)

Related-Party Transactions - Additional Information (Detail)

v3.3.1.900
Related-Party Transactions - Additional Information (Detail) - USD ($)
 12 Months Ended
Mar. 18, 2015
Mar. 13, 2015
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Mar. 31, 2015
Related Party Transaction [Line Items]            
Transition services agreement date     Oct. 01, 2013      
Real estate brokerage commissions and financing fees from transactions with former parent, Marcus & Millichap Company     $ 2,700,000 $ 1,300,000 $ 735,000  
Commission expenses for transactions with former parent, Marcus & Millichap Company     1,600,000 816,000 441,000  
Rent expense for lease     17,800,000 16,700,000 15,700,000  
Aggregate principal amount outstanding for employee notes receivable     $ 382,000 378,000    
Sweep arrangement termination date     Jun. 30, 2013      
MMC [Member]            
Related Party Transaction [Line Items]            
Rent expense for lease     $ 693,500 438,000 $ 398,000  
Lease expiration date         May 31, 2022  
Interest income earned from MMC         $ 74,000  
MMC [Member] | Shared Services [Member]            
Related Party Transaction [Line Items]            
Selling, general and administrative expense         4,300,000  
MMC [Member] | Shared Services [Member] | Health Insurance Premium [Member]            
Related Party Transaction [Line Items]            
Selling, general and administrative expense         3,200,000  
MMC [Member] | Transition Services Agreement [Member]            
Related Party Transaction [Line Items]            
Selling, general and administrative expense     257,000.0 1,300,000 824,000.0  
Accounts payable and other accrued expenses - related party     96,000 97,000    
MMC [Member] | Transition Services Agreement [Member] | Health Insurance Premium [Member]            
Related Party Transaction [Line Items]            
Selling, general and administrative expense     $ 0.0 $ 1,000,000 $ 687,000.0  
Health insurance plan establishment date     2014-04      
George M. Marcus [Member]            
Related Party Transaction [Line Items]            
Beneficial indirect ownership percentage     56.00%      
Shares registered for future sale     4,600,000      
Registration Statement date     Feb. 06, 2015      
Proceeds from issuance of common stock     $ 0      
New shares offered     0      
Costs incurred in connection with registration statement, reimbursed by selling stockholders           $ 113,000
Sale date of shares filed under registration statement     Mar. 18, 2015      
Prospectus Supplement filing date     Mar. 13, 2015      
George M. Marcus [Member] | Underwriters [Member]            
Related Party Transaction [Line Items]            
Common stock sold by certain selling stockholders 600,000 600,000        
Common stock selling price $ 31.9925          
George M. Marcus [Member] | Selling Stockholders [Member]            
Related Party Transaction [Line Items]            
Common stock sold by certain selling stockholders 4,000,000 4,000,000        
Common stock selling price $ 31.9925