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Accounting for Stock-Based Compensation (Details Textuals) (Restricted Stock, USD $)	3 Months Ended		6 Months Ended		1 Months Ended	6 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Jul. 31, 2012 Employees and other directors	Sep. 30, 2012 2006 Employee Plan	Sep. 30, 2012 2006 Director Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted common stock, shares issued					87,000	578,127	182,000
Restriction period for amortization of fair value of stock based compensation awards			3 years
Recognized compensation expense related to the Employee and Director Plans	$ 485,000	$ 561,000	$ 1,000,000	$ 1,100,000
Unrecognized compensation cost related to the non-vested restricted stock awards	$ 2,000,000	$ 3,600,000	$ 2,000,000	$ 3,600,000
Unrecognized compensation cost of non-vested restricted stock award, period of recognition			3 years

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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- Definition

Total number of shares issued during the period, including shares forfeited, as a result of Restricted Stock Awards.

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