Equity Transactions - Repurchase Program (Details) - USD ($)	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2016	May 05, 2016	Sep. 30, 2015	Feb. 05, 2014	Sep. 30, 2013
Equity Transactions
Amount yet to be expended under the program	$ 5,127,000	$ 10,127,000	$ 10,100,000	$ 5,127,000		$ 31,000,000
Total Number of Shares Purchased	2,962,978
Average Price Paid per Share (in dollars per share)	$ 15.90
Total Cash Paid for Shares Purchased	$ 44,873,000
Approximate Dollar Value of Shares that May Yet Be Purchased Under the Plans or Programs	$ 5,127,000	$ 10,127,000	10,100,000	$ 5,127,000		$ 31,000,000
Additional amount authorized under share repurchase program					$ 19,000,000
Share repurchase program approved amount			$ 5,000,000