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Stock Compensation Plans (Details Textual) (USD $) In Thousands, except Per Share data, unless otherwise specified | 12 Months Ended
--- | ---
Mar. 31, 2013 | Mar. 31, 2012 | Mar. 31, 2011
Stock Compensation Plans (Additional Textual) [Abstract] |  |  |
Number of shares authorized under stock incentive plan | 1,375 |  |
Maximum number of shares authorized for awards other than stock options | 250 |  |
Stock option awards granted | 49 | 9 | 20
Stock options maximum term | 10 years |  |
Percentage of stock options vesting per year | 33.33% | 33.33% | 33.33%
Stock options vesting period | 3 years |  |
Percentage of performance shares, vest third anniversary of grant date | 100.00% |  |
Percentage of time vested shares vested on second and fourth anniversary of grant date | 50.00% |  |
Percentage of time vested shares, vest on first anniversary of grant date | 100.00% | 100.00% | 100.00%
Weighted average fair value of options granted | $ 4.97 | $ 9.51 | $ 8.12
Cash proceeds from the exercise of stock options | $ 83 | $ 386 | $ 236
Closing stock price | $ 24.74 |  |
Total intrinsic value of the stock options exercised | 203 | 776 | 419
Unrecognized stock-based compensation expense | 885 |  |
Weighted average period for recognize expense | 1 year 6 months 26 days |  |
Options, stock awards and performance awards available for future grants | 449 |  |
Long term incentive plan [Member] |  |  |
Stock Compensation Plans (Textual) [Abstract] |  |  |
Common stock to award unit ratio | 1 |  |
Minimum service period of director | 5 years |  |
Minimum percentage of approved budgeted net income | 100.00% |  |
Maximum stock price per unit consider for calculating compensation cost | $ 3.20 |  |
Stock based compensation expense | 10 | 20 | 30
Number of share equivalent units outstanding under plan | 43 | 42 |
Related liability recorded under plan | 310 | 295 |
Expense (income) to mark to market the share equivalent units | 2 | (2) | 6
Suspended date of plan | Mar. 12, 2009 |  |
Maximum [Member] |  |  |
Stock Compensation Plans (Textual) [Abstract] |  |  |
Outstanding options expiry date range | 2022-05 |  |
Minimum [Member] |  |  |
Stock Compensation Plans (Textual) [Abstract] |  |  |
Outstanding options expiry date range | 2014-10 |  |
Stock Compensation Plan [Member] |  |  |
Stock Compensation Plans (Textual) [Abstract] |  |  |
Stock based compensation expense | 524 | 556 | 431
Income tax benefit to stock based compensation | 184 | 198 | 148
Increase in capital in excess of par value for the income tax benefit realized upon exercise of stock options and vesting of restricted | 41 | 244 | 115
Employee Stock Purchase Plan [Member] |  |  |
Stock Compensation Plans (Textual) [Abstract] |  |  |
Stock based compensation expense | 52 | 55 | 47
Income tax benefit to stock based compensation | 19 | 19 | 16
Discounted purchase price of common stock percentage on fair market value | 85.00% |  |
Shares approved for purchase under ESPP | 200 |  |
Issue of treasury stock to the ESPP for the offering periods | 19 | 19 | 13
Increase in capital in excess of par value for the income tax benefit realized upon exercise of stock options and vesting of restricted | $ 2 | $ 3 | $ 5
Restricted Stock [Member] |  |  |
Stock Compensation Plans (Textual) [Abstract] |  |  |
Restricted stock awards | 26 | 32 | 24
Restricted shares, vested equally in second and fourth anniversary |  | 7 |
Restricted Stock [Member] | Officer [Member] |  |  |
Stock Compensation Plans (Textual) [Abstract] |  |  |
Restricted stock awards | 18 | 16 | 15
Restricted Stock [Member] | Director [Member] |  |  |
Stock Compensation Plans (Textual) [Abstract] |  |  |
Restricted stock awards | 8 | 9 | 9

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