Consolidated Statements of Changes in Equity - USD ($) shares in Thousands, $ in Thousands	Common Stock	APIC	AOCI	Retained Earnings	Noncontrolling Interests	Total
Balances at the beginning of the period at Dec. 31, 2020	$ 307	$ 241,004	$ 1,968	$ 952,943		$ 1,196,222
Balance at the beginning of the period (in shares) at Dec. 31, 2020	30,678
Change in Stockholders' Equity
Walker and Dunlop net income				58,052		58,052
Other comprehensive income (loss), net of tax			(158)			(158)
Stock-based compensation - equity classified		7,836				7,836
Issuance of common stock in connection with equity compensation plans	$ 4	12,602				12,606
Issuance of common stock in connection with equity compensation plans (in shares)	430
Repurchase and retirement of common stock	$ (1)	(13,373)				(13,374)
Repurchase and retirement of common stock (in shares)	(131)
Cash dividends paid				(16,052)		(16,052)
Balances at the end of the period at Mar. 31, 2021	$ 310	248,069	1,810	994,943		1,245,132
Balance at the end of the period (in shares) at Mar. 31, 2021	30,977
Balances at the beginning of the period at Dec. 31, 2021	$ 320	393,022	2,558	1,154,252	$ 28,055	1,578,207
Balances at the beginning of the period at Dec. 31, 2021						$ 1,550,152
Balance at the beginning of the period (in shares) at Dec. 31, 2021	32,049					32,049
Change in Stockholders' Equity
Walker and Dunlop net income				71,209		$ 71,209
Net income (loss) from noncontrolling interests					(679)	(679)
Other comprehensive income (loss), net of tax			(970)			(970)
Stock-based compensation - equity classified		10,812				10,812
Issuance of common stock in connection with equity compensation plans	$ 5	15,526				15,531
Issuance of common stock in connection with equity compensation plans (in shares)	544
Repurchase and retirement of common stock	$ (1)	(27,048)				(27,049)
Repurchase and retirement of common stock (in shares)	(195)
Noncontrolling interests added due to new consolidations		(5,303)			15,490	10,187
Cash dividends paid				(20,077)		(20,077)
Balances at the end of the period at Mar. 31, 2022	$ 324	$ 387,009	$ 1,588	$ 1,205,384	$ 42,866	1,637,171
Balances at the end of the period at Mar. 31, 2022						$ 1,594,305
Balance at the end of the period (in shares) at Mar. 31, 2022	32,398					32,398