v3.26.1
Segment Reporting (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2026
Mar. 31, 2025
Segment Reporting Information [Line Items]        
Net sales $ 903,382 $ 883,146 $ 1,846,550 $ 1,821,041
Cost of goods sold 427,610 424,329 887,519 885,384
Selling, general and administrative expenses 403,841 389,444 811,165 765,964
Operating earnings 71,931 69,373 147,866 169,693
Unallocated expenses 53,586 51,866 109,455 81,889
Interest expense 14,165 16,289 28,785 33,731
Earnings before provision for income taxes 57,766 53,084 119,081 135,962
Depreciation and amortization:        
Depreciation and amortization 25,280 25,359 48,912 50,924
Operating segments        
Segment Reporting Information [Line Items]        
Net sales 903,382 883,146 1,846,550 1,821,041
Cost of goods sold 427,610 424,329 887,519 885,384
Selling, general and administrative expenses 350,255 337,578 701,710 684,075
Operating earnings 125,517 121,239 257,321 251,582
Sally | Operating segments        
Segment Reporting Information [Line Items]        
Net sales 521,236 500,575 1,052,837 1,026,021
Cost of goods sold 201,904 194,178 415,563 406,368
Selling, general and administrative expenses 241,183 229,092 481,228 462,474
Operating earnings 78,149 77,305 156,046 157,179
Depreciation and amortization:        
Depreciation and amortization 14,306 14,074 27,738 28,732
BSG | Operating segments        
Segment Reporting Information [Line Items]        
Net sales 382,146 382,571 793,713 795,020
Cost of goods sold 225,706 230,151 471,956 479,016
Selling, general and administrative expenses 109,072 108,486 220,482 221,601
Operating earnings 47,368 43,934 101,275 94,403
Depreciation and amortization:        
Depreciation and amortization 9,006 9,765 17,680 18,252
Unallocated        
Depreciation and amortization:        
Depreciation and amortization $ 1,968 $ 1,520 $ 3,494 $ 3,940