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STOCKHOLDERS' EQUITY (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Computation of diluted earnings:
Net income	$ 151.5	$ 104.2	$ 260.8	$ 210.4
Add: Interest expense from assumed conversion of convertible notes, net of tax	1.1	1.1	3.2	3.1
Net income for diluted earnings per share calculation	$ 152.6	$ 105.3	$ 264.0	$ 213.5
Computation of diluted weighted average shares outstanding:
Basic weighted average shares outstanding	44,416,803	48,406,473	45,221,248	49,285,143
Incremental shares from assumed exercise of stock options and vesting of restricted stock units	355,985	282,312	418,479	379,331
Incremental shares from assumed conversion of convertible debt	2,781,818	2,781,818	2,781,818	2,781,818
Diluted weighted average shares outstanding	47,554,606	51,470,603	48,421,545	52,446,292

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