Statements of Consolidated Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
OPERATING ACTIVITIES
Net income	$ 10,154	$ 3,630
Adjustments to reconcile net income to net cash provided by (used in) operations:
Depreciation and amortization	8,602	9,094
Provision for accounts receivable allowances	698	413
Provision for inventory reserves	1,306	1,005
Deferred income taxes	(1,144)	(1,919)
Share-based compensation expense (benefit)	927	(546)
Excess tax benefits (expenses) from share-based awards	2	(20)
Other - net	411	371
Changes in operating assets and liabilities
Accounts receivable	(4,743)	(3,874)
Inventories	(2,851)	(2,913)
Trade accounts payable and accrued liabilities	9,561	7,406
Income taxes payable	(335)	(1,696)
Other - net	(1,552)	(3,079)
NET CASH PROVIDED BY OPERATING ACTIVITIES	21,036	7,872
INVESTING ACTIVITIES
Capital expenditures	(21,697)	(6,709)
Proceeds from the sale of property and equipment	61	917
Restricted cash and purchase of fixed-term deposits	(1,314)	(2,419)
NET CASH USED IN INVESTING ACTIVITIES	(22,950)	(8,211)
FINANCING ACTIVITIES
Increase in notes payable to banks	(172)	(146)
Proceeds from the issuance of long-term debt	56,513	39,995
Payments of long-term debt	(42,650)	(40,033)
Dividends paid	(3,131)	(3,176)
Excess tax benefits (expenses) from share-based awards	(2)	20
Proceeds from issuance of common shares	378	80
Purchase of common shares for treasury	(2,915)	(2,378)
Purchase of common shares for treasury from related parties	(1,488)	(1,215)
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES	6,533	(6,853)
Effects of exchange rate changes on cash and cash equivalents	(2,072)	4,419
Net increase (decrease) in cash and cash equivalents	2,547	(2,773)
Cash and cash equivalents at beginning of year	30,393	29,643
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 32,940	$ 26,870