Consolidated Statements of Cash Flows - USD ($) $ in Thousands		12 Months Ended			77 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2021
Operating activities
Net income		$ 556,569	$ 347,218	$ 252,308
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation		42,155	36,493	32,265
Amortization of intangible assets		49,886	32,280	28,644
Amortization of original issue discount and deferred financing costs		2,589	2,598	4,712
Loss on extinguishment of debt	[1]	831	0	926
Loss on pension settlement	[2]	0	0	10,920
Deferred income taxes		(2,096)	21,195	18,733
Share-based compensation expense	[3]	23,954	20,882	16,694
Loss (gain) on disposal of assets		(4,393)	0	0
Other		206	7,145	1,086
Net changes in operating assets and liabilities, net of acquisitions:
Accounts receivable		(131,861)	(55,976)	8,231
Inventories		(470,991)	(77,983)	26,369
Other assets		(819)	12,859	(358)
Accounts payable		297,323	66,040	(69,404)
Accrued wages and employee benefits		5,814	20,157	(3,724)
Other accrued liabilities		73,798	60,593	(16,252)
Excess tax benefits from equity awards		(31,809)	(6,968)	(2,263)
Net cash provided by operating activities		411,156	486,533	308,887
Investing activities
Proceeds from sale of property and equipment		259	179	95
Proceeds from sale of investment		4,968	0	0
Proceeds from beneficial interest in securitization transactions		4,609	2,651	2,630
Contribution to equity method investment		(3,660)	0	0
Expenditures for property and equipment		(109,992)	(62,128)	(60,802)
Acquisition of businesses, net of cash acquired		(713,471)	(64,797)	(112,001)
Net cash used in investing activities		(817,287)	(124,095)	(170,078)
Financing activities
Proceeds from short-term borrowings		272,818	257,593	73,340
Proceeds from long-term borrowings		150,088	277	1,660
Repayments of short-term borrowings		(239,113)	(277,719)	(59,518)
Repayments of long-term borrowings and finance lease obligations		(108,556)	(4,758)	(53,049)
Stock repurchases		(125,992)	0	0	$ (431,539)
Payment of contingent acquisition consideration		(3,750)	(4,000)	(5,550)
Payment of debt issuance costs		(1,185)	0	(1,473)
Purchase of additional ownership interest		(27,164)	0	0
Cash dividends paid to noncontrolling interest of subsidiary		0	0	(285)
Taxes paid related to equity awards		(58,903)	(14,910)	(6,438)
Proceeds from the exercise of stock options		38,787	13,089	9,395
Net cash used in financing activities		(102,970)	(30,428)	(41,918)
Effect of exchange rate changes on cash and cash equivalents		1,312	235	1,510
Net (decrease) increase in cash and cash equivalents		(507,789)	332,245	98,401
Cash and cash equivalents at beginning of period		655,128	322,883	224,482
Cash and cash equivalents at end of period		147,339	655,128	322,883	$ 147,339
Supplemental disclosure of cash flow information
Interest		27,842	28,765	35,465
Income taxes		$ 156,728	$ 61,861	$ 61,767

[1] Represents the non-cash write-off of original issue discount and deferred financing costs due to a voluntary prepayment of Term Loan debt.

[2] Represents pre-tax settlement charges related to the termination of the Company’s domestic pension plan in the fourth quarter of 2019.

[3] Represents share-based compensation expense to account for stock options, restricted stock and other stock awards over their respective vesting periods.