CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS (UNAUDITED) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Net sales
Product sales	$ 457,026	$ 417,259	$ 1,351,126	$ 1,232,336
Service sales	102,468	95,150	322,828	301,080
Total net sales	559,494	512,409	1,673,954	1,533,416
Cost of sales
Cost of product sales	301,592	270,902	890,051	809,949
Cost of service sales	64,474	62,829	207,430	196,492
Total cost of sales	366,066	333,731	1,097,481	1,006,441
Gross profit	193,428	178,678	576,473	526,975
Research and development expenses	16,909	14,693	51,150	45,395
Selling expenses	30,659	31,816	95,504	95,279
General and administrative expenses	71,720	66,539	222,757	221,311
Operating income	74,140	65,630	207,062	164,990
Interest expense	(9,013)	(9,701)	(27,054)	(27,701)
Other income, net	(158)	288	(64)	852
Earnings from continuing operations before income taxes	64,969	56,217	179,944	138,141
Provision for income taxes	20,659	18,282	56,359	43,801
Earnings from continuing operations	44,310	37,935	123,585	94,340
Loss from discontinued operations, net of taxes	(19,277)	(1,574)	(26,997)	(3,666)
Net earnings	$ 25,033	$ 36,361	$ 96,588	$ 90,674
Basic earnings per share
Earnings from continuing operations (usd per share)	$ 0.92	$ 0.81	$ 2.57	$ 2.02
Earnings from discontinued operations (usd per share)	$ (0.40)	$ (0.04)	$ (0.56)	$ (0.08)
Total, Basic earnings per share (usd per share)	$ 0.52	$ 0.77	$ 2.01	$ 1.94
Diluted earnings per share
Earnings from continuing operations (usd per share)	$ 0.90	$ 0.79	$ 2.52	$ 1.98
Earnings from discontinued operations (usd per share)	$ (0.39)	$ (0.03)	$ (0.55)	$ (0.08)
Total, Diluted earnings per share (usd per share)	$ 0.51	$ 0.76	$ 1.97	$ 1.90
Dividends per share	$ 0.13	$ 0.10	$ 0.39	$ 0.29
Weighted average shares outstanding:
Basic (shares)	48,067	47,081	48,054	46,839
Diluted (shares)	49,101	48,063	49,136	47,685