Business Acquisitions (Schedule of Unaudited Pro Forma Results) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Net sales	$ 483,759	$ 460,241	$ 1,377,611	$ 1,336,930
Net earnings	23,663	28,302	93,477	95,470
Basic earnings per share	$ 0.35	$ 0.41	$ 1.36	$ 1.38
Diluted earnings per share	$ 0.34	$ 0.40	$ 1.34	$ 1.36
Business Acquisition, Acquiree - Duarte Business [Member]
Pro forma
Net sales	483,759	489,203	1,408,011	1,419,386
Net earnings	$ 24,817	$ 25,848	$ 99,129	$ 85,972
Basic earnings per share	$ 0.36	$ 0.38	$ 1.45	$ 1.25
Diluted earnings per share	$ 0.36	$ 0.37	$ 1.42	$ 1.22