CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS (UNAUDITED) (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
Product sales	$ 502,818	$ 385,641	$ 1,500,450	$ 1,214,541
Service sales	97,849	93,581	310,591	292,728
Total net sales	600,667	479,222	1,811,041	1,507,269
Cost of sales
Cost of product sales	340,955	275,142	1,027,695	848,616
Cost of service sales	65,010	62,664	203,923	193,956
Total cost of sales	405,965	337,806	1,231,618	1,042,572
Gross profit	194,702	141,416	579,423	464,697
Research and development expenses	16,054	13,267	49,565	43,965
Selling expenses	38,019	28,009	113,715	93,378
General and administrative expenses	77,742	76,774	257,442	227,889
Operating income	62,887	23,366	158,701	99,465
Interest expense	(9,690)	(6,648)	(27,681)	(19,656)
Other income, net	378	(119)	1,076	113
Earnings from continuing operations before income taxes	53,575	16,599	132,096	79,922
Provision for income taxes	17,214	5,156	41,422	25,802
Earnings from continuing operations	36,361	11,443	90,674	54,120
Discontinued operations, net of taxes
Earnings from discontinued operations	0	0	0	3,059
Gain (loss) on divestiture	0	(144)	0	18,172
Earnings (loss) from discontinued operations	0	(144)	0	21,231
Net earnings	$ 36,361	$ 11,299	$ 90,674	$ 75,351
Basic earnings per share
Earnings from continuing operations (usd per share)	$ 0.77	$ 0.24	$ 1.94	$ 1.17
Earnings from discontinued operations (usd per share)	$ 0	$ 0.00	$ 0.00	$ 0.45
Total, Basic earnings per share (usd per share)	$ 0.77	$ 0.24	$ 1.94	$ 1.62
Diluted earnings per share
Earnings from continuing operations (usd per share)	$ 0.76	$ 0.24	$ 1.90	$ 1.14
Earnings from discontinued operations (usd per share)	$ 0.00	$ 0.00	$ 0.00	$ 0.45
Total, Diluted earnings per share (usd per share)	$ 0.76	$ 0.24	$ 1.90	$ 1.59
Dividends per share	$ 0.10	$ 0.09	$ 0.29	$ 0.26
Weighted average shares outstanding:
Basic (shares)	47,081	46,884	46,839	46,795
Diluted (shares)	48,063	47,415	47,685	47,493