Common Stock, Options and Stock Compensation (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013
Compensation costs included in net income
Gross compensation costs	$ 7,040	$ 2,129	$ 8,276	$ 3,054
Income tax benefits	(2,444)	(720)	(2,869)	(1,019)
Net compensation expense	$ 4,596	$ 1,409	$ 5,407	$ 2,035
Stock options exercised, shares		3,000		3,000