CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) - USD ($)	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities
Net income	$ 59,420,000	$ 60,604,000
Adjustments to reconcile net income to net cash provided by/(used in) operating activities
Depreciation and amortization	2,037,000	1,875,000
Provision for bad debt expense	1,225,000	508,000
Share-based compensation expense	2,851,000	1,574,000
Equity-based payments to non-employees	8,000	198,000
Non-cash rent expense	(193,000)	(181,000)
Amortization of debt related costs	840,000	75,000
Fair value change in assets and liabilities	201,000	0
Original issuance discount on term loan payment	(10,000)	0
Deferred tax expense	1,594,000	0
Changes in assets and liabilities:
(Increase)/decrease in loan receivables held for sale	29,896,000	(40,982,000)
(Increase)/decrease in accounts receivable	(3,070,000)	(2,531,000)
(Increase)/decrease in related party receivables	182,000	106,000
(Increase)/decrease in other assets	3,619,000	(1,659,000)
Increase/(decrease) in accounts payable	(1,217,000)	9,211,000
Increase/(decrease) in finance charge reversal liability	12,899,000	8,255,000
Increase/(decrease) in related party liabilities	(1,044,000)	(607,000)
Increase/(decrease) in other liabilities	366,000	3,710,000
Net cash provided by/(used in) operating activities	109,604,000	40,156,000
Cash flows from investing activities
Purchases of property, equipment and software	(2,707,000)	(1,985,000)
Net cash used in investing activities	(2,707,000)	(1,985,000)
Cash flows from financing activities
Proceeds from IPO, net of underwriters discount and commissions	954,845,000	0
Purchases of GreenSky Holdings, LLC units	(901,833,000)	0
Purchases of Class A common stock	(53,012,000)	0
Issuances of Class B common stock	129,000	0
Redemptions of GreenSky Holdings, LLC units prior to Reorganization Transactions	(496,000)	0
Proceeds from term loan	399,000,000	0
Repayments of term loan	(350,115,000)	0
Member distributions	(127,640,000)	(55,283,000)
Equity option exercises prior to Reorganization Transactions	339,000	15,000
Payment of IPO related expenses	(2,749,000)	0
Payment of equity transaction expenses, prior to Reorganization Transactions	32,000	0
Payment of debt issuance costs	0	(361,000)
Net cash provided by/(used in) financing activities	(81,564,000)	(55,629,000)
Net increase/(decrease) in cash and restricted cash	25,333,000	(17,458,000)
Cash and restricted cash at beginning of period	353,838,000	228,114,000
Cash and restricted cash at end of period	379,171,000	210,656,000
Supplemental non-cash investing and financing activities
Equity transaction costs accrued but not paid	1,106,000	0
Distributions accrued but not paid	$ 11,493,000	$ 0