Interim Condensed Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Net sales:
Net sales	$ 174,738	$ 156,078	$ 511,231	$ 478,998
Cost of sales	131,582	119,008	389,072	367,529
Gross profit	43,156	37,070	122,159	111,469
Selling, general and administrative expenses	27,830	23,992	79,533	73,073
Income from operations	15,326	13,078	42,626	38,396
Interest expense	(319)	(392)	(897)	(1,360)
Interest income	44	66	129	179
Other income (expense), net	558	(234)	1,190	(656)
Income before income taxes	15,609	12,518	43,048	36,559
Provision for income taxes	4,276	3,943	12,978	11,855
Net Income	11,333	8,575	30,070	24,704
Net income per common share:
Basic (in dollars per share)	$ 0.94	$ 0.72	$ 2.50	$ 2.08
Diluted (in dollars per share)	$ 0.93	$ 0.71	$ 2.47	$ 2.05
Average common shares:
Basic (in shares)	12,069	11,903	12,040	11,887
Diluted (in shares)	12,229	12,056	12,196	12,047
Dividends declared (in dollars per share)	$ 0.07	$ 0.06	$ 0.21	$ 0.18
North American Industrial
Net sales:
Net sales	71,890	61,972	218,863	196,841
Income from operations	6,489	3,866	20,030	14,954
North American Agricultural
Net sales:
Net sales	61,157	54,135	168,048	155,487
Income from operations	6,250	5,787	16,261	14,547
European
Net sales:
Net sales	41,691	39,971	124,320	126,670
Income from operations	$ 2,587	$ 3,425	$ 6,335	$ 8,895