Accounting for Stock-Based Compensation (Details Textuals) (Restricted Stock, USD $)	3 Months Ended		9 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restriction period for amortization of fair value of stock based compensation awards			3 years
Recognized compensation expense related to the Employee and Director Plans	$ 458,000	$ 559,000	$ 1,500,000	$ 1,700,000
Unrecognized compensation cost related to the non-vested restricted stock awards	$ 1,500,000	$ 3,000,000	$ 1,500,000	$ 3,000,000
Unrecognized compensation cost of non-vested restricted stock award, period of recognition			3 years
2006 Employee Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted common stock, shares issued			572,127
2006 Director Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted common stock, shares issued			182,000