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, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Business Combinations
Net sales	$ 524,284	$ 483,759	$ 1,435,793	$ 1,377,611
Net earnings	46,001	23,663	114,182	93,477
Basic earnings per share	$ 0.70	$ 0.35	$ 1.71	$ 1.36
Diluted earnings per share	$ 0.69	$ 0.34	$ 1.68	$ 1.34
Pro forma
Net sales	524,284	483,759	1,435,793	1,408,011
Net earnings	$ 46,289	$ 24,639	$ 115,059	$ 98,609
Basic earnings per share	$ 0.70	$ 0.36	$ 1.72	$ 1.44
Diluted earnings per share	$ 0.69	$ 0.35	$ 1.69	$ 1.41