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Shareholders' Equity (Narrative) (Details)	1 Months Ended		12 Months Ended			81 Months Ended
Shareholders' Equity (Narrative) (Details)	Dec. 31, 2011 plan	Feb. 28, 2003 shares	Sep. 30, 2018 USD ($) $ / shares shares	Sep. 30, 2017 USD ($) $ / shares shares	Sep. 30, 2016 USD ($)	Sep. 30, 2018 USD ($) $ / shares shares	Jun. 24, 2016 shares	Dec. 20, 2011 USD ($)	Feb. 28, 2007 shares	Apr. 01, 2002 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of voting rights per share, common stock \| $ / shares			$ 1
Preferred stock, shares authorized			10,000,000	10,000,000		10,000,000
Preferred stock, par value \| $ / shares			$ 0.0001	$ 0.0001		$ 0.0001
Preferred stock, shares issued			700,000	700,000		700,000
Preferred stock, liquidation preference (in dollars per share) \| $ / shares			$ 100	$ 100		$ 100
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs \| $				$ 1,200,000
Preferred stock cash dividends declared \| $			$ 5,250,000	5,250,000	$ 1,424,000
Repurchase of common stock authorized by Board of Directors \| $								$ 25,000,000
Purchased shares						1,677,570
Average price per share \| $ / shares						$ 9.09
Aggregate cost of treasury stock repurchased during the period \| $						$ 15,300,000
Number of repurchase plan replaced by existing plan \| plan	2
Preferred Stock Including Additional Paid in Capital [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Proceeds from Issuance or Sale of Equity \| $				$ 70,000,000
Two Thousand Two Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuance of options to purchase shares of common stock										700,000
Number of additional shares authorized for issuance under an established share-based compensation plan		100,000
Vesting period			4 years
Expiration date of options granted			10 years
Two Thousand Three Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuance of options to purchase shares of common stock									5,300,000
Common stock reserved for issuance			2,700,000			2,700,000
Available for future grant			1,900,000			1,900,000
Termination Due to Death [Member] \| Two Thousand Two Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Termination of the participant reason of death			1 year
Termination for reasons other than death, disability, cause, material breach or unsatisfactory performance [Member] \| Two Thousand Two Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Termination of the participant reason other than death			30 days
Restricted Stock [Member] \| Termination for reasons other than death, disability, cause, material breach or unsatisfactory performance [Member] \| Two Thousand Three Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			1 year
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized stock compensation expense \| $			$ 1,100,000			$ 1,100,000
Unrecognized stock compensation expense, period for recognition			1 year 5 months
Expected dividend rate \| $			$ 0.00
Restricted Stock Units (RSUs) [Member] \| Termination for reasons other than death, disability, cause, material breach or unsatisfactory performance [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			1 year
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized stock compensation expense \| $			$ 300,000			$ 300,000
Unrecognized stock compensation expense, period for recognition			1 year 7 months
Minimum [Member] \| Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			4 years
Minimum [Member] \| Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			4 years
Maximum [Member] \| Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			5 years
Maximum [Member] \| Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			5 years
Series A Preferred Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred stock, shares issued			700,000	700,000		700,000
Preferred stock, liquidation preference (in dollars per share) \| $ / shares			$ 100	$ 100		$ 100
Preferred Stock, Dividend Rate, Percentage			7.50%
Preferred Stock, Dividend Payment Rate, Variable			If we do not pay a Cash Dividend, the liquidation preference shall be increased to an amount equal to the current liquidation preference in effect plus an amount reflecting that liquidation preference multiplied by the Cash Dividend rate then in effect plus 2.0% per year (Accrued Dividend).
Preferred Stock Voting Cap				4.99%
Convertible Preferred Stock, Terms of Conversion				3.33
Conversion cap, percentage				4.99%
Conversion cap, shares							1,225,227