Consolidated Statements of Income and Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenues
Total revenues	$ 315,611			$ 346,290			$ 975,903	$ 851,989
Expenses
Personnel	157,059			170,181			469,608	407,817
Amortization and depreciation	59,846			53,498			177,101	148,879
Provision (benefit) for credit losses	1,218			1,266			(13,120)	(14,380)
Interest expense on corporate debt	9,306			1,766			22,123	5,291
Other operating expenses	33,991			24,836			102,400	62,171
Total expenses	261,420			251,547			758,112	609,778
Income from operations	54,191			94,743			217,791	242,211
Income tax expense	7,532			22,953			46,495	56,311
Net income before noncontrolling interests	46,659			71,790			171,296	185,900
Less: net income (loss) from noncontrolling interests	(174)	$ (179)	$ (679)	69			(1,032)	69
Walker and Dunlop net income	46,833	$ 54,286	$ 71,209	71,721	$ 56,058	$ 58,052	172,328	185,831
Net change in unrealized gains (losses) on pledged available-for-sale securities, net of taxes	(1,238)			159			(4,018)	769
Walker and Dunlop comprehensive income	$ 45,595			$ 71,880			$ 168,310	$ 186,600
Basic earnings per share (NOTE 10)	$ 1.41			$ 2.23			$ 5.18	$ 5.80
Diluted earnings per share (NOTE 10)	$ 1.40			$ 2.21			$ 5.13	$ 5.73
Basic weighted average shares outstanding	32,290			31,064			32,300	30,969
Diluted weighted average shares outstanding	32,620			31,459			32,645	31,367
Loan origination and debt brokerage fees, Net
Revenues
Total revenues	$ 90,858			$ 123,242			$ 275,773	$ 306,593
Fair value of expected net cash flows from servicing, net
Revenues
Total revenues	55,291			89,482			159,970	209,266
Servicing fees
Revenues
Total revenues	75,975			70,628			222,916	205,658
Property sales broker fees
Revenues
Total revenues	30,308			33,677			100,092	65,173
Investment management fees
Revenues
Total revenues	16,301			2,564			47,345	9,115
Net warehouse interest income
Revenues
Total revenues	3,980			5,583			14,021	14,768
Escrow earnings and other interest income
Revenues
Total revenues	18,129			2,032			26,683	5,972
Other revenue
Revenues
Total revenues	$ 24,769			$ 19,082			$ 129,103	$ 35,444