Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Cash Flows from Operating Activities
Net income	$ 187,498	$ 193,925
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	44,564	44,701
Stock option expense	19,343	16,342
Provision/(benefit) for deferred income taxes	10,408	(561)
Noncash long-term incentive compensation	4,343	5,344
Noncash directors' compensation	1,170	1,173
Amortization of debt issuance costs	247	229
Litigation settlements paid previously accrued		(9,440)
Changes in operating assets and liabilities:
Decrease in accounts receivable	16,166	9,247
Increase in inventories	(360)	(1,299)
Decrease/(increase) in prepaid expenses	1,257	(6,117)
Increase/(decrease) in accounts payable and other current liabilities	(15,765)	6,330
Change in current income taxes	(10,277)	(15,749)
Net change in lease assets and liabilities	313	15
Increase in other assets	(42,424)	(13,561)
(Decrease)/increase in other liabilities	(6,555)	13,474
Other (uses)/sources	(241)	974
Net cash provided by operating activities	209,687	245,027
Cash Flows from Investing Activities
Capital expenditures	(39,066)	(44,472)
Proceeds from sale of fixed assets	2,037
Business combinations, net of cash acquired	(2,044)
Other sources	(841)	760
Net cash used by investing activities	(39,914)	(43,712)
Cash Flows from Financing Activities
Payments on revolving line of credit	(299,400)	(1,500)
Proceeds from revolving line of credit	116,500	1,500
Proceeds from other long-term debt	100,000
Payments on other long-term debt	(1,250)
Purchases of treasury stock	(101,539)	(330,380)
Proceeds from exercise of stock options	17,128	17,918
Dividends paid	(16,391)	(16,457)
Capital stock surrendered to pay taxes on stock-based compensation	(12,497)	(9,445)
Change in cash overdrafts payable	5,535	3,054
Debt issuance costs	(1,584)
Other (uses)/sources	(1,389)	63
Net cash used by financing activities	(194,887)	(335,247)
Decrease in Cash and Cash Equivalents	(25,114)	(133,932)
Cash and cash equivalents at beginning of year	32,895	162,675
Cash and cash equivalents at end of period	$ 7,781	$ 28,743