Consolidated Statements Of Cash Flows Unaudited - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash Flows from Operating Activities
Net income	$ 130,625	$ 121,922
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	29,890	30,347
Stock option expense	14,667	12,345
(Benefit)/provision for deferred income taxes	(2,129)	1,051
Noncash long-term incentive compensation	2,497	3,402
Noncash directors' compensation	1,170	1,173
Amortization of debt issuance costs	153	153
Provision for bad debts		40
Litigation settlements paid previously accrued		(9,440)
Changes in operating assets and liabilities:
Decrease in accounts receivable	887	4,722
Increase in inventories	(587)	(316)
Decrease in prepaid expenses	3,689	3,337
Decrease in accounts payable and other current liabilities	(24,001)	(10,815)
Change in current income taxes	27	(26,242)
Net change in lease assets and liabilities	705	(436)
Decrease/(increase) in other assets	2,071	(10,088)
(Decrease)/increase in other liabilities	(1,491)	10,088
Other (uses)/sources	(503)	796
Net cash provided by operating activities	157,670	132,039
Cash Flows from Investing Activities
Capital expenditures	(25,610)	(33,604)
Proceeds from sale of fixed assets	1,757	522
Business combinations, net of cash acquired	(1,650)
Other sources	(132)	(220)
Net cash used by investing activities	(25,635)	(33,302)
Cash Flows from Financing Activities
Payments on revolving line of credit	(263,300)
Proceeds from revolving line of credit	95,100
Proceeds from other long-term debt	100,000
Purchases of treasury stock	(77,214)	(166,649)
Proceeds from exercise of stock options	12,869	16,186
Capital stock surrendered to pay taxes on stock-based compensation	(12,115)	(8,598)
Dividends paid	(10,722)	(10,864)
Change in cash overdrafts payable	1,716
Debt issuance costs	(1,510)
Other (uses)/sources	(114)	633
Net cash used by financing activities	(155,290)	(169,292)
Decrease in Cash and Cash Equivalents	(23,255)	(70,555)
Cash and cash equivalents at beginning of year	32,895	162,675
Cash and cash equivalents at end of period	$ 9,640	$ 92,120