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Stock-Based Compensation - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
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Sep. 30, 2014
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Sep. 30, 2013
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Sep. 30, 2014
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Sep. 30, 2013
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Employee Stock Purchase Plan [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Stock based compensation expense | $ 13 | $ 13 | $ 30 | $ 28 |
| Income tax benefit to stock based compensation | 4 | 4 | 10 | 9 |
| Discounted purchase price of common stock percentage on fair market value | 85.00% | 85.00% | 85.00% | 85.00% |
| Shares approved for purchase under ESPP | 200 | 200 | ||
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Restricted Stock [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Stock based compensation expense | 163 | 134 | 269 | 314 |
| Income tax benefit to stock based compensation | $ 57 | $ 47 | $ 94 | $ 110 |
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Amended And Restated 2000 Incentive Plan [Member] | Employee Stock Option [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Stock options maximum term | 10 years | 10 years | 10 years | 10 years |
| Stock option awards granted | 0 | 0 | ||
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Amended And Restated 2000 Incentive Plan [Member] | Employee Stock Option [Member] | Maximum [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Number of shares authorized | 1,375 | 1,375 | ||
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Amended And Restated 2000 Incentive Plan [Member] | Restricted Stock [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Restricted stock awards | 30 | 32 | ||
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Amended And Restated 2000 Incentive Plan [Member] | Restricted Stock [Member] | Time Vested Restricted Stock [Member] | Director [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Restricted stock awards | 2 | 0 | 7 | 6 |
| Share-based compensation vesting percentage | 100.00% | 100.00% | 100.00% | 100.00% |
| Vesting period | 1 year | 1 year | 1 year | 1 year |
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Amended And Restated 2000 Incentive Plan [Member] | Restricted Stock [Member] | Time Vested Restricted Stock [Member] | Officers and Key Employees [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Restricted stock awards | 11 | 12 | ||
| Share-based compensation vesting percentage | 33.33% | 33.33% | ||
| Vesting period | 3 years | 3 years | ||
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Amended And Restated 2000 Incentive Plan [Member] | Restricted Stock [Member] | Performance Vested Restricted Stock [Member] | Officer [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Restricted stock awards | 12 | 14 | ||
| Share-based compensation vesting percentage | 100.00% | 100.00% | ||
| Vesting period | 3 years | 3 years | ||
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Amended And Restated 2000 Incentive Plan [Member] | Restricted Stock [Member] | Maximum [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Number of shares authorized | 250 | 250 | ||