Interim Condensed Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Net sales:
Net sales	$ 156,078	$ 155,057	$ 478,998	$ 456,596
Cost of sales	119,008	117,834	367,529	350,081
Gross profit	37,070	37,223	111,469	106,515
Selling, general and administrative expense	23,992	22,762	73,073	69,007
Income from operations	13,078	14,461	38,396	37,508
Interest expense	(392)	(506)	(1,360)	(1,715)
Interest income	66	32	179	156
Other income (expense), net	(234)	817	(656)	595
Income before income taxes	12,518	14,804	36,559	36,544
Provision for income taxes	3,943	4,748	11,855	11,907
Net Income	8,575	10,056	24,704	24,637
Net income per common share:
Basic (in dollars per share)	$ 0.72	$ 0.85	$ 2.08	$ 2.08
Diluted (in dollars per share)	$ 0.71	$ 0.84	$ 2.05	$ 2.06
Average common shares:
Basic (in shares)	11,903	11,857	11,887	11,845
Diluted (in shares)	12,056	11,947	12,047	11,964
Dividends declared (in dollars per share)	$ 0.06	$ 0.06	$ 0.18	$ 0.18
North American Industrial
Net sales:
Net sales	61,972	56,965	196,841	165,319
Income from operations	3,866	4,146	14,954	12,248
North American Agricultural
Net sales:
Net sales	54,135	55,301	155,487	160,510
Income from operations	5,787	6,432	14,547	15,203
European
Net sales:
Net sales	39,971	42,791	126,670	130,767
Income from operations	$ 3,425	$ 3,883	$ 8,895	$ 10,057