Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash flows from operating activities:
Net income	$ 117,829	$ 92,093
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	129,618	142,648
Loss (gain) on sale of property and equipment	12	(159)
Stock-based compensation expense related to stock options and employee stock purchases	15,803	15,850
Provision for deferred income tax expense	21,603	12,125
Change in accounts receivable, net	(29,153)	6,172
Change in inventories, net	5,709	(200,662)
Change in prepaid expenses and other, net	(13,928)	1,241
Change in trade accounts payable	9,848	26,238
(Payments) draws on floor plan notes payable – trade, net	(14,148)	87,548
Change in customer deposits	(2,630)	13,219
Change in accrued expenses	(18,715)	6,710
Other, net	(227)	0
Net cash provided by operating activities	221,621	203,023
Cash flows from investing activities:
Acquisition of property and equipment	(230,595)	(176,221)
Proceeds from the sale of property and equipment	2,100	5,822
Proceeds from the sale of available for sale securities	0	6,375
Business acquisitions	(10,168)	0
Purchase of equity method investment and call option	(22,499)	0
Change in other assets	2,412	(1,803)
Net cash used in investing activities	(258,750)	(165,827)
Cash flows from financing activities:
Draws on floor plan notes payable – non-trade, net	42,370	124,485
Proceeds from long-term debt	162,039	115,216
Draws on line of credit	135,000	0
Principal payments on long-term debt	(141,844)	(127,354)
Principal payments on finance lease obligations	(7,508)	(9,511)
Payments on line of credit	(135,000)	0
Proceeds from issuance of shares relating to employee stock options and employee stock purchases	4,536	3,764
Payments of cash dividends	(13,578)	(4,692)
Common stock repurchased	(53,764)	(58,076)
Debt issuance costs	(731)	0
Net cash (used in) provided by financing activities	(8,480)	43,832
Net (decrease) increase in cash and cash equivalents	(45,609)	81,028
Cash and cash equivalents, beginning of period	131,726	124,541
Cash and cash equivalents, end of period	86,117	205,569
Supplemental disclosure of cash flow information:
Interest	43,909	31,002
Income taxes, net of refunds	41,197	15,990
Assets acquired under finance leases	24,754	3,241
Common stock repurchased	435	0
Guaranty agreement	$ 5,025	$ 0