Common Stock, Options, and Stock Compensation (Details) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Gross compensation costs:
Total gross compensation costs	$ 6,845	$ 7,128	$ 6,660
Income tax benefits:
Total income tax benefits	(3,576)	(2,460)	(2,203)
Net compensation expense	3,269	4,668	4,457
Stock Options [Member]
Income tax benefits:
Total income tax benefits	0	0	(39)
Restricted Stock [Member]
Gross compensation costs:
Total gross compensation costs	6,845	7,128	6,660
Income tax benefits:
Total income tax benefits	$ (3,576)	$ (2,460)	$ (2,164)
Common Class A [Member]
Information on Class A Common Stock issued as acquisition
Shares issued due to acquisitions	0	1,965	635
Shares issued due to purchase of subsidiary shares from noncontrolling interest	0	592	0