Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:
Consolidated net income	$ 161,712	$ 191,898	$ 145,096
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Gain on originated mortgage servicing rights	(103,160)	(95,284)	(120,970)
Depreciation and amortization	131,144	97,733	95,815
Nasdaq recognition	(98,580)	(85,135)	(76,969)
Equity-based compensation and allocation of net income to limited partnership units and FPUs and issuance of common stock	258,836	224,644	10,000
Employee loan amortization	38,987	27,743	34,420
Deferred tax provision/(benefit)	(27,852)	16,387	44,383
Change in fair value of contingent consideration	728	374	2,675
Realized gains on non-marketable investments, net	(12,159)	(17,899)	0
Unrealized (gains) loss on loans held for sale	(5,174)	(18,430)	(2,194)
Income from an equity method investment	(7,250)	(2,750)	(1,562)
Provision for uncollectible accounts	1,817	3,530	6,099
Realized (gains) loss on marketable securities	(4,056)	(3,256)	0
Unrealized (gains) loss on marketable securities	(11,303)	1,193	0
Change in valuation of derivative asset	51,117	(19,002)	636
Loan originations—loans held for sale	(8,783,225)	(8,612,671)	(8,844,768)
Loan sales—loans held for sale	9,563,973	8,002,872	9,556,163
Other	4,260	1,586	1,367
Consolidated net income (loss), adjusted for non-cash and non-operating items	1,159,815	(286,467)	850,191
Changes in operating assets and liabilities:
Receivables, net	(52,021)	(129,490)	(57,175)
Loans, forgivable loans and other receivables from employees and partners	(161,897)	(109,569)	(34,321)
Other assets	(113,241)	(9,924)	36,086
Accrued compensation	39,959	50,198	45,753
Accounts payable, accrued expenses and other liabilities	90,712	152,885	13,103
Payables to related parties	23,433	0	0
Net cash provided by (used in) operating activities	986,760	(332,367)	853,637
CASH FLOWS FROM INVESTING ACTIVITIES:
Payments for acquisitions, net of cash acquired	(33,939)	(34,513)	2,793
Distributions from equity method investment	8,560	0	0
Proceeds from the sale of marketable securities	32,606	95,878	18,710
Purchase of non-marketable investments	(28,000)	(29,500)	0
Purchases of fixed assets	(34,526)	(21,016)	(19,069)
Payments to related parties	0	0	(375,000)
Borrowings from related parties	0	0	375,000
Purchase of mortgage servicing rights	(1,489)	(3,107)	(2,055)
Net cash (used in) provided by investing activities	(56,788)	7,742	379
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from warehouse facilities	8,783,225	8,612,671	8,844,768
Principal payments on warehouse facilities	(9,545,964)	(8,000,725)	(8,742,295)
Proceeds from BGC's purchase of exchangeable limited partnership units in Newmark Holdings	0	241,960	0
Proceeds from issuance of EPUs	0	262,169	0
Payments to related parties	0	(858,428)	(1,445,838)
Borrowings from related parties	0	372,950	698,919
Settlement of pre-Spin-Off related party receivables	33,892	0	0
Proceeds from the IPO, net of underwriting discounts	0	(8,870)	304,290
Borrowing of debt	155,000	537,575	0
Repayment of debt	(105,000)	(670,710)	(304,290)
Distributions of earnings to BGC	0	0	(101,731)
Pre-acquisition distributions relating to BPF acquisitions	0	0	(89,146)
Capital contribution	0	9,189	0
Securities loaned	36,735	(57,623)	57,623
Treasury stock repurchases	(37,368)	(486)	0
Earnings distributions to limited partnership interests and noncontrolling interests	(140,576)	(46,490)	(71)
Dividends to stockholders	(69,245)	(41,787)	0
Prepayment penalty on debt	0	(6,954)	0
Payments on acquisition earn-outs	(4,837)	(4,476)	(18,940)
Payment of deferred financing costs	(1,368)	(1,308)	(1,485)
Net cash (used in) provided by financing activities	(895,506)	338,657	(798,196)
Net increase in cash and cash equivalents and restricted cash	34,466	14,032	55,820
Cash and cash equivalents and restricted cash at beginning of period	187,406	173,374	117,554
Cash and cash equivalents and restricted cash at end of period	221,872	187,406	173,374
Cash paid during the period for:
Interest	36,959	81,838	21,003
Taxes	95,089	1,165	46
Supplemental disclosure of noncash operating, investing and financing activities:
Right-of-use assets and liabilities	182,180
Treasury stock repurchase	4,732	0	0
Net assets contributed by BGC Partners’	0	0	368,418
Debt assumed from BGC	0	0	(1,387,500)
Accrued offering costs	$ 0	$ 0	$ 8,870