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Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash flows from operating activities:
Net income	$ 49,968	$ 76,070	$ 69,715
cash provided by operating activities:
Depreciation and amortization including impairment loss	9,067	8,729	11,031
Provision for doubtful accounts	4,824	1,380	1,442
Noncash stock compensation	3,029	3,394	2,205
Share of income of equity investment	(549)
Lease expense	62	1,068
Deferred tax expense (benefit)	581	(2,330)	(158)
Change in fair value of derivatives	(137)	(169)	(302)
Changes in:
Accounts receivable	13,157	1,124	(21,532)
Inventories	19,333	(5,925)	(29,341)
Other assets	1,176	(4,945)	(1,016)
Accounts payable and accrued expenses	(32,239)	(4,960)	25,592
Income taxes, net	(3,279)	3,016	5,405
Net cash provided by operating activities	64,993	76,452	63,041
Cash flows from investing activities:
Purchases of short-term investments	(7,582)	(97,958)	(10,030)
Proceeds from sale of short-term investments	11,513	44,814	8,859
Purchase of equipment and leasehold improvements	(11,011)	(5,427)	(3,956)
Payment for intangible assets acquired	(1,251)	(6,067)	(8,509)
Purchase of equity investment	(13,998)
Net cash used in investing activities	(22,329)	(64,638)	(13,636)
Cash flows from financing activities:
Repayment of long-term debt	(13,725)	(22,321)	(23,487)
Proceeds issuance of long-term debt	13,438
Proceeds from exercise of options	2,771	4,458	3,406
Dividends paid	(20,805)	(34,579)	(26,287)
Dividends paid to noncontrolling interests	(324)	(9,654)	(8,706)
Purchase of subsidiary shares from noncontrolling interests		(6,087)	(808)
Net cash used in financing activities	(18,645)	(68,183)	(55,882)
Effect of exchange rate changes on cash	12,245	(3,350)	(8,730)
Net increase (decrease) in cash and cash equivalents	36,264	(59,719)	(15,207)
Cash and cash equivalents – beginning of year	133,417	193,136	208,343
Cash and cash equivalents – end of year	169,681	133,417	193,136
Cash paid for:
Interest	1,105	1,764	1,754
Income taxes	$ 21,772	$ 26,332	$ 24,995

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