Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
CASH FLOWS FROM OPERATING ACTIVITIES:
Consolidated net income	$ 178,039	$ 152,339
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Gain on originated mortgage servicing rights	(73,873)	(65,632)
Depreciation and amortization	98,510	68,587
Nasdaq recognition	(98,580)	(85,135)
Equity-based compensation and allocations of net income to limited partnership units and FPUs	109,872	125,559
Employee loan amortization	31,688	20,704
Deferred tax provision	956	4,359
Change in fair value of contingent consideration	639	138
Realized gain on non-marketable investments, net	(20,960)
Unrealized gains on loans held for sale	(22,522)	(461)
Income from an equity method investment	(6,000)	(5,000)
Provision for uncollectible accounts	1,575	2,376
Realized gains on marketable securities	(4,056)	(1,494)
Unrealized gains on marketable securities	(4,445)	(897)
Changes in valuation of derivative asset	37,181	(6,327)
Loan originations—loans held for sale	(7,511,234)	(5,937,964)
Loan sales—loans held for sale	7,820,263	5,168,394
Other	3,234	667
Consolidated net income (loss), adjusted for non-cash and non-operating items	540,287	(559,787)
Changes in operating assets and liabilities:
Receivables, net	(24,293)	(67,253)
Loans, forgivable loans and other receivables from employees and partners	(102,745)	(85,127)
Other assets	(62,883)	(27,092)
Accrued compensation	13,326	33,535
Accounts payable, accrued expenses and other liabilities	24,114	69,364
Payables to related parties	5,609
Net cash provided by (used in) operating activities	393,415	(636,360)
CASH FLOWS FROM INVESTING ACTIVITIES:
Payments for acquisitions, net of cash acquired	(18,212)	(32,533)
Distributions from Real Estate LP	7,293
Proceeds from the sale of marketable securities	32,606	51,433
Purchases of non-marketable investments	(28,000)	(22,500)
Purchases of fixed assets	(23,447)	(10,786)
Purchases of mortgage servicing rights	(845)	(2,124)
Net cash used in investing activities	(30,605)	(16,510)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from warehouse facilities	7,511,234	5,937,964
Principal payments on warehouse facilities	(7,802,761)	(5,166,612)
Proceeds from BGC's purchase of exchangeable limited partnership units in Newmark Holdings		241,960
Proceeds from issuance of exchangeable preferred partnership units		265,569
Payments to related parties		(130,500)
Borrowings from related parties		368,495
Settlement of pre-Spin-Off related party receivables	33,892
Fees relating to the IPO		(8,870)
Repayment of debt	(95,000)	(536,760)
Borrowings of debt	155,000
Securities loaned	24,838	(49,043)
Earnings distributions to limited partnership interests and noncontrolling interests	(112,691)	(23,139)
Dividends to stockholders	(51,659)	(27,858)
Treasury stock repurchases	(33,983)
Payments on acquisition earn-outs	(3,407)	(3,500)
Payments of deferred financing costs	(1,363)	(1,152)
Net cash (used in) provided by financing activities	(375,900)	866,554
Net (decrease) increase in cash and cash equivalents and restricted cash	(13,090)	213,684
Cash and cash equivalents and restricted cash at beginning of period	187,406	173,374
Cash and cash equivalents and restricted cash at end of period	174,316	387,058
Cash paid during the period for:
Interest	19,329	53,900
Taxes	$ 82,939	$ 903