Employee Benefit Plans (Details Textual) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2010
Employee Benefit Plans (Textual) [Abstract]
Employee benefit plans employer contributions	$ 630	$ 479	$ 371
Maximum percentage of salary deferment	75.00%
Maximum percentage of annual bonus deferment	100.00%
Deferred compensation liability	3,497	2,488
Net cash surrender value of life insurance policies for deferred compensation	2,959	2,953
Maximum percentage of gross payroll each employee Authorize withhold	10.00%
Percentage of matching contribution by employee	5.00%
Deferral Plan [Member]
Employee Benefit Plans (Textual) [Abstract]
Employee benefit plans employer contributions	66	33	48
Voluntary Employee Stock Contribution plan [Member]
Employee Benefit Plans (Textual) [Abstract]
Employee benefit plans employer contributions	$ 47	$ 39	$ 35