CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ INVESTMENT - USD ($)	3 Months Ended				12 Months Ended
	Dec. 31, 2024	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)		231,455,443			231,455,443
Balance at beginning of period		$ 2,312,517,069		$ 2,065,792,821	$ 2,312,517,069	$ 2,065,792,821	$ 1,937,988,467
Issuance of common stock from stock plan transactions					27,295,127	29,398,272	16,602,274
Issuance of common stock related to acquisitions							5,000,012
Noncontrolling Interest as part of acquisition					4,149,000
Repurchases of common stock					(206,108,138)	(146,036,137)	(113,894,370)
Stock-based compensation expense related to stock options, employee stock purchases, restricted stock, and performance share awards					39,539,362	39,197,422	30,228,606
Dividends declared					(109,928,289)	(111,824,393)	(112,819,342)
Net income	$ 87,668,000	108,231,000	$ 116,944,000	97,578,000	404,487,743	428,403,272	318,757,352
Other comprehensive income (loss)					$ 147,781	$ 7,585,812	(16,070,178)
Ending balance (in shares)	227,207,472		231,455,443		227,207,472	231,455,443
Balance at end of period	$ 2,472,099,655		$ 2,312,517,069		$ 2,472,099,655	$ 2,312,517,069	2,065,792,821
Parent
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period		$ 2,312,517,069		$ 2,065,792,821	2,312,517,069	2,065,792,821	1,937,988,467
Issuance of common stock from stock plan transactions					27,295,127	29,398,272	16,602,274
Issuance of common stock related to acquisitions							5,000,012
Noncontrolling Interest as part of acquisition					0
Repurchases of common stock					(206,108,138)	(146,036,137)	(113,894,370)
Stock-based compensation expense related to stock options, employee stock purchases, restricted stock, and performance share awards					39,539,362	39,197,422	30,228,606
Dividends declared					(109,928,289)	(111,824,393)	(112,819,342)
Net income					404,487,743	428,403,272	318,757,352
Other comprehensive income (loss)					147,781	7,585,812	(16,070,178)
Balance at end of period	$ 2,467,950,655		$ 2,312,517,069		$ 2,467,950,655	$ 2,312,517,069	$ 2,065,792,821
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)		231,455,443		234,169,335	231,455,443	234,169,335	236,440,840
Balance at beginning of period		$ 13,887,326		$ 14,050,160	$ 13,887,326	$ 14,050,160	$ 14,186,450
Issuance of common stock from stock plan transactions (in shares)					2,153,810	2,218,094	1,606,965
Issuance of common stock from stock plan transactions					$ 129,229	$ 133,086	$ 96,418
Issuance of common stock related to acquisitions (in shares)							162,433
Issuance of common stock related to acquisitions							$ 9,746
Repurchases of common stock (in shares)					(6,401,781)	(4,931,986)	(4,040,903)
Repurchases of common stock					$ (384,107)	$ (295,920)	$ (242,454)
Ending balance (in shares)	227,207,472		231,455,443		227,207,472	231,455,443	234,169,335
Balance at end of period	$ 13,632,448		$ 13,887,326		$ 13,632,448	$ 13,887,326	$ 14,050,160
Additional  Paid-In Capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period		968,245,875		917,499,323	968,245,875	917,499,323	879,413,385
Issuance of common stock from stock plan transactions					27,165,898	29,265,186	16,505,856
Issuance of common stock related to acquisitions							4,990,266
Repurchases of common stock					(24,510,715)	(17,716,056)	(13,638,790)
Stock-based compensation expense related to stock options, employee stock purchases, restricted stock, and performance share awards					39,539,362	39,197,422	30,228,606
Balance at end of period	1,010,440,420		968,245,875		1,010,440,420	968,245,875	917,499,323
Retained  Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period		1,336,940,990		1,148,386,272	1,336,940,990	1,148,386,272	1,042,461,388
Repurchases of common stock					(181,213,316)	(128,024,161)	(100,013,126)
Dividends declared					(109,928,289)	(111,824,393)	(112,819,342)
Net income					404,487,743	428,403,272	318,757,352
Balance at end of period	1,450,287,128		1,336,940,990		1,450,287,128	1,336,940,990	1,148,386,272
Accumulated  Other Comprehensive Income (Loss)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period		(6,557,122)		(14,142,934)	(6,557,122)	(14,142,934)	1,927,244
Other comprehensive income (loss)					147,781	7,585,812	(16,070,178)
Balance at end of period	(6,409,341)		(6,557,122)		(6,409,341)	(6,557,122)	(14,142,934)
Equity Attributable to Noncontrolling Interests
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period		$ 0		$ 0	0	0	0
Noncontrolling Interest as part of acquisition					4,149,000
Balance at end of period	$ 4,149,000		$ 0		$ 4,149,000	$ 0	$ 0