Interim Condensed Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Net sales:
Net sales	$ 206,353	$ 178,064	$ 377,603	$ 336,493
Cost of sales	159,067	133,973	292,187	257,490
Gross profit	47,286	44,091	85,416	79,003
Selling, general and administrative expenses	32,490	26,530	59,989	51,703
Income from operations	14,796	17,561	25,427	27,300
Interest expense	(1,044)	(336)	(1,283)	(578)
Interest income	35	41	96	85
Other income, net	153	343	627	632
Income before income taxes	13,940	17,609	24,867	27,439
Provision for income taxes	4,745	5,822	8,434	8,702
Net Income	9,195	11,787	16,433	18,737
Net income per common share:
Basic (in dollars per share)	$ 0.76	$ 0.98	$ 1.36	$ 1.56
Diluted (in dollars per share)	$ 0.75	$ 0.97	$ 1.34	$ 1.54
Average common shares:
Basic (in shares)	12,097	12,044	12,090	12,025
Diluted (in shares)	12,276	12,200	12,273	12,179
Dividends declared (in dollars per share)	$ 0.07	$ 0.07	$ 0.14	$ 0.14
North American Industrial
Net sales:
Net sales	105,082	77,639	182,396	146,973
Income from operations	10,128	8,344	16,428	13,541
North American Agricultural
Net sales:
Net sales	52,631	57,255	102,476	106,891
Income from operations	2,375	7,375	4,790	10,011
European
Net sales:
Net sales	48,640	43,170	92,731	82,629
Income from operations	$ 2,293	$ 1,842	$ 4,209	$ 3,748