Marcus & Millichap, Inc. Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity - Additional Information (Detail)

Stockholders' Equity - Additional Information (Detail) (USD $)	0 Months Ended	10 Months Ended	12 Months Ended
	Nov. 05, 2013	Oct. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Mar. 31, 2013	Nov. 30, 2013
Stockholders Equity [Line Items]
Common stock, shares issued			36,918,442us-gaap_CommonStockSharesIssued	36,600,897us-gaap_CommonStockSharesIssued
Common stock, shares outstanding			36,918,442us-gaap_CommonStockSharesOutstanding	36,600,897us-gaap_CommonStockSharesOutstanding
Common stock share, par value		$ 1.00	$ 0.0001	$ 0.0001
Common stock dividends declared and paid			$ 0us-gaap_DividendsCommonStock
Preferred stock, shares authorized			25,000,000us-gaap_PreferredStockSharesAuthorized	25,000,000us-gaap_PreferredStockSharesAuthorized
Preferred stock, par value			$ 0.0001	$ 0.0001
Preferred stock, shares issued			0us-gaap_PreferredStockSharesIssued	0us-gaap_PreferredStockSharesIssued
Preferred stock, shares outstanding			0us-gaap_PreferredStockSharesOutstanding	0us-gaap_PreferredStockSharesOutstanding
Preferred stock, voting rights		The pre-IPO Series A Preferred stockholders did not have voting rights.
Prior to completion of IPO date			Oct. 30, 2013
Proceeds from IPO	42,300,000
IPO related expenses	4,300,000mmi_OtherOfferingCosts
Preferred stock dividends declared and paid		37,681,000us-gaap_DividendsPreferredStock		37,681,000us-gaap_DividendsPreferredStock	30,756,000us-gaap_DividendsPreferredStock
Stock appreciations rights liability, amount			20,542,000mmi_StockAppreciationRightsLiability	19,970,000mmi_StockAppreciationRightsLiability		20,000,000mmi_StockAppreciationRightsLiability
Notes payable to former stockholders			11,504,000us-gaap_OtherNotesPayable
Interest expense related to notes payable to former stockholders				318,000
Deferred tax assets, net transferred from parent prior to IPO		26,600,000us-gaap_DeferredTaxAssetsLiabilitiesNet		26,572,000us-gaap_DeferredTaxAssetsLiabilitiesNet
Deferred tax assets, net transferred from parent prior to IPO, effective tax rate used for calculation				40.00%
IPO [Member]
Stockholders Equity [Line Items]
Common stock issued	6,900,000
IPO completion date			November 5, 2013
Common stock sold and issued under IPO, price per share	$ 12.00						$ 12
IPO MMI [Member]
Stockholders Equity [Line Items]
Common stock issued	4,173,413
IPO Underwriters [Member]
Stockholders Equity [Line Items]
Common stock issued	900,000
Underwriting discounts and commissions	3,500,000
IPO Selling Stockholder [Member]
Stockholders Equity [Line Items]
Common stock issued	2,726,587
MMREIS [Member]
Stockholders Equity [Line Items]
Common stock, shares issued		234,489			234,489
Common stock, shares outstanding		234,489			234,489
Common stock dividends declared and paid				0	0
Exchange of Stock for Stock [Member] \| MMC [Member]
Stockholders Equity [Line Items]
Common stock share, par value		$ 0.0001
Notes Payable APIC [Member]
Stockholders Equity [Line Items]
Notes payable to former stockholders				$ 12,200,000
Series A redeemable preferred stock [Member]
Stockholders Equity [Line Items]
Preferred stock, par value		$ 10.00
Preferred stock, shares issued					1,000
Preferred stock, shares outstanding					1,000
Preferred stock liquidation preference per share		$ 10			$ 10
Preferred stock, redemption value per share		$ 10
Exchange of common stock		1,000			1,000
Preferred stock, dividend per share		$ 10			$ 10
MMREIS Common Stock [Member]
Stockholders Equity [Line Items]
Exchange of common stock		234,489			234,489
Marcus And Millichap Common Stock [Member]
Stockholders Equity [Line Items]
Exchange of common stock		32,357,901
MMREIS Managing Directors [Member] \| MMREIS Common Stock [Member]
Stockholders Equity [Line Items]
Exchange of common stock		28,749
Restricted Stock [Member] \| Non-employee directors [Member]
Stockholders Equity [Line Items]
Common stock issued			42,882	30,000