Stockholders' Equity (Narrative) (Details) (USD $)	12 Months Ended			85 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2014	Jul. 28, 2014 Series 1 Redeemable Preferred Stock (Series 1 Shares)	Nov. 17, 2014 Series 1 Redeemable Preferred Stock (Series 1 Shares) Subsequent Event	Jul. 28, 2014 Series 1 Redeemable Preferred Stock (Series 1 Shares) Chingis
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares authorized	70,000,000	70,000,000		70,000,000
Preferred stock, shares authorized	5,000,000	5,000,000		5,000,000	324	324
Remaining percentage of outstanding shares of common stock (less than 1%)							1.00%
Exchange ratio for Series 1 share for each outstanding share of Chingis common stock							0.10%
Redeemable cash price per share					$ 559.35
Aggregate cost of redemption						$ 200,000
Stock repurchased and retired during period (shares)				14,179,711
Stock repurchased and retired during period, value	358,000	555,000	537,000	88,500,000
Stock repurchase program, remaining authorized repurchase amount	19,800,000			19,800,000
Shares paid for tax withholding for share based compensation (shares)	30,886	59,501
Payments related to tax withholding for share-based compensation	$ 358,000	$ 555,000