Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Operating activities
Net cash provided by operating activities	$ 22,088	$ 18,696
Investing activities
Expenditures for property, plant and equipment	(5,967)	(9,182)
Proceeds from the sale of property, plant and equipment	37	274
Other	(22)	628
Net cash used for investing activities	(5,952)	(8,280)
Financing activities
Additions to long-term debt	1,218	691
Reductions of long-term debt	(323)	(30,411)
Cash dividends paid	(2,480)	(2,289)
Purchase of treasury shares	(1,385)	(55)
Net cash used for financing activities	(2,970)	(32,064)
Cash and cash equivalents
Total increase (decrease) for the period	13,166	(21,648)
Balance at the beginning of the period	85,257	101,600
Balance at the end of the period	$ 98,423	$ 79,952