Summary of Significant Accounting Policies (Details 2) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Numerator:
Income from continuing operations	$ 6,840	$ 10,314	$ 5,973	$ 6,867
Loss from discontinued operations, net of tax	81	5,171	44	1,049
Net income	$ 6,921	$ 15,485	$ 6,017	$ 7,916
Denominator:
Weighted average shares outstanding for basic income per common share	9,592	9,741	9,617	9,738
Effect of dilutive stock options	29	6	3	5
Adjusted weighted average share outstanding for diluted income per common share	9,621	9,747	9,620	9,743
Basic:
Continuing operations	$ 0.71	$ 1.06	$ 0.62	$ 0.71
Discontinued operations	$ 0.01	$ 0.53	$ 0.00	$ 0.11
Total	$ 0.72	$ 1.59	$ 0.63	$ 0.81
Diluted:
Continuing operations	$ 0.71	$ 1.06	$ 0.62	$ 0.70
Discontinued operations	$ 0.01	$ 0.53	$ 0.00	$ 0.11
Total	$ 0.72	$ 1.59	$ 0.63	$ 0.81