Business Acquisitions (Schedule of Unaudited Pro Forma Results) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Business Combinations
Net sales	$ 429,042	$ 408,339
Net earnings	23,383	27,368
Basic earnings per share	$ 0.35	$ 0.40
Diluted earnings per share	$ 0.34	$ 0.39
Pro forma
Net sales	429,042	438,739
Net earnings	$ 23,632	$ 28,438
Basic earnings per share	$ 0.35	$ 0.42
Diluted earnings per share	$ 0.34	$ 0.41