Stockholders' Equity Repurchase Plan (Details) (USD $)	12 Months Ended	36 Months Ended	12 Months Ended					1 Months Ended
	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012 May 2011 Plan	Mar. 31, 2013 Common Stock	Mar. 31, 2011 Common Stock	Mar. 31, 2013 Common Stock January 2006 Plan	Jan. 31, 2006 Common Stock January 2006 Plan	May 31, 2011 Common Stock May 2011 Plan
Equity, Class of Treasury Stock [Line Items]
Shares authorized to be repurchased							1,000,000
Plan period in force								1 year
Remaining shares authorized to be repurchased						276,633
Total amount of repurchase authorized								$ 5,000,000
Maximum repurchase price per share							$ 12.75
Shares repurchased		304,922	304,922	0	0
Average price per share repurchased		$ 14.24	$ 14.24	$ 0.00	$ 0.00
Value of stock repurchased	$ 4,341,000	$ 4,341,000	$ 4,341,000	$ 0	$ 0