SEGMENT REPORTING (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Segment Reporting
Sales	$ 4,525,058	$ 4,272,201	$ 8,661,982	$ 8,248,441
Cost of goods sold, including warehouse and distribution expenses	2,198,520	2,104,141	4,213,959	4,046,209
Gross profit	2,326,538	2,168,060	4,448,023	4,202,232
Depreciation and amortization expense			247,159	222,885
Interest expense	57,337	54,831	114,901	111,979
Provision for income taxes	192,860	188,708	338,726	341,860
Net income	668,595	622,848	1,207,080	1,170,086
Automotive Aftermarket Parts Segment [Member]
Segment Reporting
Sales	4,525,058	4,272,201	8,661,982	8,248,441
Cost of goods sold, including warehouse and distribution expenses	2,198,520	2,104,141	4,213,959	4,046,209
Gross profit	2,326,538	2,168,060	4,448,023	4,202,232
Team Member compensation expense	895,688	824,280	1,759,232	1,640,777
Rent expense	115,090	106,229	228,250	211,016
Depreciation and amortization expense	101,492	91,556	200,502	180,253
Advertising expense	24,894	27,681	44,828	45,848
Other segment items	270,582	251,927	554,504	500,413
Interest expense	57,337	54,831	114,901	111,979
Provision for income taxes	192,860	188,708	338,726	341,860
Net income	$ 668,595	$ 622,848	$ 1,207,080	$ 1,170,086