Interim Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Net sales:
Net sales	$ 211,489	$ 215,734	$ 422,460	$ 423,532
Cost of sales	159,311	165,069	320,005	327,330
Gross profit	52,178	50,665	102,455	96,202
Selling, general and administrative expenses	34,137	34,230	68,125	67,639
Income from operations	18,041	16,435	34,330	28,563
Interest expense	(1,523)	(1,848)	(2,929)	(3,471)
Interest income	56	41	118	93
Other income (expense), net	242	488	(380)	1,348
Income before income taxes	16,816	15,116	31,139	26,533
Provision for income taxes	6,254	5,406	11,918	9,464
Net Income	$ 10,562	$ 9,710	$ 19,221	$ 17,069
Net income per common share:
Basic (in dollars per share)	$ 0.93	$ 0.86	$ 1.69	$ 1.51
Diluted (in dollars per share)	$ 0.92	$ 0.84	$ 1.67	$ 1.49
Average common shares:
Basic (in shares)	11,422	11,352	11,405	11,316
Diluted (in shares)	11,550	11,498	11,529	11,467
Dividends declared (in dollars per share)	$ 0.09000	$ 0.08000	$ 0.18000	$ 0.16000
Industrial
Net sales:
Net sales	$ 117,146	$ 118,521	$ 240,424	$ 235,433
Income from operations	9,171	10,100	20,698	19,437
Agricultural
Net sales:
Net sales	51,845	52,981	100,507	101,438
Income from operations	6,048	3,722	8,807	4,514
European
Net sales:
Net sales	42,498	44,232	81,529	86,661
Income from operations	$ 2,822	$ 2,613	$ 4,825	$ 4,612