Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities:
Net income	$ 287,739	$ 158,440	$ 146,509
Adjustments to reconcile net income to cash flows provided by operating activities:
Depreciation and amortization	112,320	97,980	75,358
Stock-based compensation expense	27,161	18,502	16,077
Deferred taxes	(3,279)	(1,504)	3,416
Other non-cash items	7,456	2,229	(1,553)
Changes in assets and liabilities, net of acquisitions of businesses:
Accounts receivable, net	(58,843)	(45,028)	(25,452)
Inventories, net	(516,692)	(86,898)	57,790
Prepaid expenses and other assets	(13,306)	(29,158)	6,882
Accounts payable, trade	68,879	67,679	(12,189)
Accrued expenses and other liabilities	(23,008)	49,158	2,687
Net cash flows (used in) provided by operating activities	(111,573)	231,400	269,525
Cash flows from investing activities:
Capital expenditures	(98,534)	(57,346)	(58,202)
Acquisitions of businesses, net of cash acquired	(194,107)	(182,130)	(447,764)
Other investing activities	11,423	7,175	2,132
Net cash flows used in investing activities	(281,218)	(232,301)	(503,834)
Cash flows from financing activities:
Vesting of stock-based awards, net of shares tendered for payment of taxes	(8,324)	(4,853)	(8,084)
Proceeds from revolving credit facility	1,303,193	543,991	655,387
Repayments under revolving credit facility	(1,281,147)	(430,390)	(628,891)
Proceeds from term loan borrowings	124,199	0	300,000
Repayments under term loan and other borrowings	(21,457)	(22,444)	0
Proceeds from issuance of convertible notes	460,000	0	0
Purchases of convertible note hedge contracts	(100,142)	0	0
Proceeds from issuance of warrants concurrent with note hedge contracts	48,484	0	0
Payment of debt issuance costs	(12,214)	0	0
Payment of dividends	(87,171)	(70,401)	(63,813)
Payment of contingent consideration and holdbacks related to acquisitions	(22,830)	(1,633)	(10)
Other financing activities	1,972	(222)	382
Net cash flows provided by financing activities	404,563	14,048	254,971
Effect of exchange rate changes on cash and cash equivalents	(697)	3,315	(231)
Net increase in cash and cash equivalents	11,075	16,462	20,431
Cash and cash equivalents at beginning of period	51,821	35,359	14,928
Cash and cash equivalents cash at end of period	62,896	51,821	35,359
Supplemental disclosure of cash flow information:
Cash paid during the period for interest	15,429	16,910	9,143
Cash paid during the period for income taxes, net of refunds	94,075	33,247	37,836
Purchase of property and equipment in accrued expenses	$ 3,602	$ 2,739	$ 3,417