CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
OPERATING ACTIVITIES:
Net income	$ 17,810	$ 27,419
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	6,915	6,612
(Gain) loss on disposal of property, plant and equipment	4	(8)
Provision for doubtful accounts	148	(33)
Issuance of non-employee director shares	194	150
Deferred tax provision	399	59
Changes in operating assets and liabilities:
Accounts receivable	19,188	(16,841)
Inventories	1,836	(5,063)
Prepaid expenses	484	(1,483)
Other assets	352	781
Accounts payable	(3,355)	17,186
Accrued liabilities	154	(755)
Net cash flows from operating activities	44,129	28,024
INVESTING ACTIVITIES:
Purchases of property, plant and equipment	(12,691)	(15,434)
Proceeds from sale of property, plant and equipment	43	31
Net cash flows from investing activities	(12,648)	(15,403)
FINANCING ACTIVITIES:
Net proceeds (payments) under credit facility	(4,998)	(5,000)
Payments of cash dividends	(6,159)	(6,156)
Net payments on other long-term obligations	(297)	(275)
Finance lease obligation payments	(16)	(15)
Net cash flows from financing activities	(11,470)	(11,446)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND TEMPORARY INVESTMENTS	1,429	(753)
NET CHANGE IN CASH AND TEMPORARY INVESTMENTS	21,440	422
CASH AND TEMPORARY INVESTMENTS, beginning of period	26,072	27,037
CASH AND TEMPORARY INVESTMENTS, end of period	47,512	27,459
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash payments for interest	1,659	2,500
Cash payments for income taxes, net of refunds	$ 3,925	$ 9,050