Capital Stock (Schedule for Stock Option Activity) (Details) - 1998 Stock Incentive Plan and the 1998 Non-Employee Director Stock Option Plan - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Number of Options
Outstanding at the beginning of the period (in shares)	32,500	42,500
Exercised (in shares)	(32,500)	(10,000)
Outstanding at the end of the period (in shares)	0	32,500
Weighted-Average Exercise Price
Average exercise price (in dollars per share)		$ 14.22	$ 13.59
Exercised (in dollars per share)	$ 14.22	$ 11.53
Aggregate Option Price
Aggregate option price	$ 0	$ 462	$ 577
Exercised	$ (462)	$ (115)