Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Operating activities
Net income		$ 43,411	$ 45,769
Adjustment to reconcile net income to net cash provided by operating activities:
Depreciation		8,335	7,265
Amortization of intangible assets		7,781	5,342
Amortization of original issue discount and deferred financing costs		642	1,177
Deferred income taxes		1,571	5,151
Share-based compensation expense	[1]	4,574	3,594
Other		416	66
Net changes in operating assets and liabilities, net of acquisitions:
Accounts receivable		(5,687)	46,970
Inventories		(48,145)	(41,644)
Other assets		(6,017)	(1,293)
Accounts payable		12,817	(37,176)
Accrued wages and employee benefits		(18,125)	(14,148)
Other accrued liabilities		12,976	(5,762)
Excess tax benefits from equity awards		(3,203)	(740)
Net cash provided by operating activities		11,346	14,571
Investing activities
Proceeds from sale of property and equipment		0	23
Proceeds from beneficial interests in securitization transactions		618	743
Expenditures for property and equipment		(12,894)	(15,902)
Acquisition of business, net of cash acquired		0	(61,549)
Net cash used in investing activities		(12,276)	(76,685)
Financing activities
Proceeds from short-term borrowings		20,694	13,531
Repayments of short-term borrowings		(25,526)	(13,282)
Repayments of long-term borrowings and finance lease obligations		(1,176)	(908)
Payment of contingent acquisition consideration		(4,000)	0
Taxes paid related to equity awards		(7,666)	(3,156)
Proceeds from exercise of stock options		1,590	2,193
Net cash used in financing activities		(16,084)	(1,622)
Effect of exchange rate changes on cash and cash equivalents		1,587	520
Net decrease in cash and cash equivalents		(15,427)	(63,216)
Cash and cash equivalents at beginning of period		322,883	224,482
Cash and cash equivalents at end of period		$ 307,456	$ 161,266

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