Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities:
Net income	$ 13,299	$ 24,978
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation and amortization	2,230	2,150
Provision for doubtful accounts	444	38
Lease expense	19	196
Noncash share-based compensation	124	955
Deferred tax benefit	(463)	(565)
Change in fair value of derivatives	(170)	(294)
Changes in:
Accounts receivable	(4,545)	(33,385)
Inventories	(4,702)	(6,698)
Other assets	(3,545)	1,738
Accounts payable and accrued expenses	(29,821)	(8,875)
Income taxes, net	2,013	5,156
Net cash used in operating activities	(25,117)	(14,606)
Cash flows from investing activities:
Purchases of short-term investments	(2,342)	(22,366)
Proceeds from sale of short-term investments		17,037
Purchases of equipment and leasehold improvements	(1,254)	(964)
Payment for intangible assets acquired	(460)	(53)
Net cash used in investing activities	(4,056)	(6,346)
Cash flows from financing activities:
Repayment of long-term debt	(6,577)	(5,655)
Proceeds from exercise of options	641	2,251
Dividends paid	(10,399)	(8,630)
Purchase of subsidiary shares from noncontrolling interest		(844)
Dividends paid to minority interest	(324)
Net cash used in financing activities	(16,659)	(12,878)
Effect of exchange rate changes on cash	(4,028)	(2,924)
Net decrease in cash and cash equivalents	(49,860)	(36,754)
Cash and cash equivalents - beginning of period	192,417	193,136
Cash and cash equivalents - end of period	142,557	156,382
Supplemental disclosure of cash flow information:
Interest	462	301
Income taxes	$ 3,706	$ 5,185