Interim Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Net sales
Products	$ 419,991	$ 387,074
Service	115,409	111,692
Total net sales	535,400	498,766
Cost of sales
Products	187,845	167,713
Service	70,453	69,546
Gross profit	277,102	261,507
Research and development	28,667	26,351
Selling, general and administrative	167,641	161,378
Amortization	5,199	3,622
Interest expense	5,823	5,711
Restructuring charges	308	498
Other charges (income), net	156	669
Earnings before taxes	69,308	63,278
Provision for taxes	16,981	16,451
Net earnings	52,327	46,827
Basic earnings per common share:
Net earnings	$ 1.66	$ 1.45
Weighted average number of common shares	31,531,915	32,290,595
Diluted earnings per common share:
Net earnings	$ 1.62	$ 1.41
Weighted average number of common and common equivalent shares	32,386,924	33,291,632
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ 73,118	$ 65,743