Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cash flows from operating activities:
Net (loss) income	$ (533)	$ 11,376
Adjustments to reconcile net (loss) income to cash flows from operating activities:
Depreciation and amortization	18,437	16,983
Non-cash lease expense	7,987	8,566
Stock-based compensation	4,242	4,002
Inventory write-down	2,003	3,267
Foreign currency losses / (gains)	1,639	(2,102)
Loss / (gain) on disposal of assets	218	(17)
Deferred taxes	1,348	(72)
Changes in operating assets and liabilities:
Accounts receivable, net	7,447	(15,336)
Inventories, net	6,999	(23,001)
Prepaid expenses and other	(13,352)	(12,895)
Other assets	(4,295)	(864)
Accounts payable	(10,575)	(4,495)
Accrued expenses	(4,227)	(4,129)
Other liabilities	(14,020)	(3,360)
Net cash provided by / (used in) operating activities	3,318	(22,077)
Cash flows from investing activities:
Purchases of property and equipment	(12,281)	(11,487)
Proceeds on investment sales	3,019	4,986
Purchases of investments	0	(8,195)
Net cash used in investing activities	(9,262)	(14,696)
Cash flows from financing activities:
Exercise of employee stock options and taxes paid related to the net shares settlement of stock awards	(1,891)	4,184
Payment of cash dividends	(2,979)	(19,392)
Finance lease principal payments	(785)	(912)
Contingent consideration payments	(6,300)	0
Payments of debt	(20,000)	(2,500)
Proceeds from debt	0	20,000
Net cash (used in) / provided by financing activities	(31,955)	1,380
Effect of exchange rate changes on cash	(5,626)	609
Net decrease in cash and cash equivalents	(43,525)	(34,784)
Cash and cash equivalents, beginning of period	256,057	264,725
Cash and cash equivalents, end of period	$ 212,532	$ 229,941