Quarterly Financial Information (Unaudited) (Error Corrections And Prior Period Adjustments) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Cost of sales									$ 334,850	$ 323,939	$ 295,863
Earnings before income taxes									61,521	62,207	49,595
Income tax expense									19,785	19,594	18,335
Net earnings from continuing operations	$ 12,983	$ 10,748	$ 7,982	$ 10,023	$ 12,927	$ 11,590	$ 9,264	$ 8,832	$ 41,736	$ 42,613	$ 31,260
Diluted net earnings per share	$ 0.50	$ 0.45	$ 0.29	$ 0.38	$ 0.43	$ 0.43	$ (1.26)	$ 0.42	$ 1.62	$ 0.02	$ (0.96)
Scenario, Previously Reported [Member]
Cost of sales			$ 80,140	$ 70,420
Earnings before income taxes			13,791	14,776
Income tax expense			5,144	3,948
Net earnings from continuing operations			$ 8,647	$ 10,828
Diluted net earnings per share			$ 0.32	$ 0.41
Restatement Adjustment [Member]
Cost of sales			$ 81,142	$ 71,621
Earnings before income taxes			12,789	13,575
Income tax expense			4,807	3,552
Net earnings from continuing operations			$ 7,982	$ 10,023
Diluted net earnings per share			$ 0.29	$ 0.38