Condensed Consolidated Statements of Income and Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenues
Loan origination and debt brokerage fees, net	$ 83,825	$ 65,144	$ 238,105	$ 188,550
Fair value of expected net cash flows from servicing, net	78,065	50,785	236,434	132,995
Servicing fees	60,265	54,219	172,561	159,424
Net warehouse interest income	7,558	6,172	22,454	19,604
Escrow earnings and other interest income	2,275	15,163	15,689	43,847
Other revenues	15,028	20,784	48,755	55,609
Total revenues	247,016	212,267	733,998	600,029
Expenses
Personnel	114,548	93,057	310,993	249,086
Amortization and depreciation	41,919	37,636	123,998	112,920
Provision (benefit) for credit losses	3,483	(772)	32,029	2,864
Interest expense on corporate debt	1,786	3,638	6,724	11,067
Other operating costs	16,165	19,393	47,324	51,715
Total expenses	177,901	152,952	521,068	427,652
Income from operations	69,115	59,315	212,930	172,377
Income tax expense	15,925	15,246	50,076	42,102
Net income before noncontrolling interests	53,190	44,069	162,854	130,275
Less: net income (loss) from noncontrolling interests		26	(224)	(182)
Walker and Dunlop net income	53,190	44,043	163,078	130,457
Net change in unrealized gains and losses on pledged available-for-sale securities, net of taxes	1,219	123	731	1,090
Walker and Dunlop comprehensive income	$ 54,409	$ 44,166	$ 163,809	$ 131,547
Basic earnings per share (NOTE 10)	$ 1.69	$ 1.42	$ 5.21	$ 4.22
Diluted earnings per share (NOTE 10)	$ 1.66	$ 1.39	$ 5.11	$ 4.11
Basic weighted average shares outstanding	30,560	29,987	30,379	29,885
Diluted weighted average shares outstanding	31,074	30,782	30,995	30,742