| **Share-based Compensation (Details 2) (Stock Settled Stock Appreciation Rights (SSARS) [Member], USD $)In Thousands, except Per Share data, unless otherwise specified** | 9 Months Ended           |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------------------------|
||
| Stock Settled Stock Appreciation Rights (SSARS) [Member]                                                                                                                  |                     |
| **Share-based Compensation Arrangement by Share-based Payment Award [Line Items]**                                                                                        |                     |
| Number of Rights Outstanding at April 1, 2012                                                                                                                             | 606,834                  |
| Weighted Average Exercise Price Outstanding at April 1, 2012                                                                                                              | $ 6.91                   |
| Number of Rights Granted,                                                                                                                                                 | 318,607                  |
| Weighted Average Exercise Price Granted,                                                                                                                                  | $ 7.52                   |
| Number of Rights Exercised                                                                                                                                                | (138,207)                |
| Weighted Average Exercise Price Exercised                                                                                                                                 | $ 6.56                   |
| Number of Rights, Forfeited                                                                                                                                               | (66,561)                 |
| Weighted Average Exercise Price, Forfeited                                                                                                                                | $ 7.43                   |
| Number of Rights Outstanding at December 31, 2012                                                                                                                         | 720,673                  |
| Weighted Average Exercise Price Outstanding at December 31, 2012                                                                                                          | $ 7.20                   |
| Remaining Contractual Term Outstanding at December 31, 2012                                                                                                               | 7 years 2 months 12 days |
| Aggregate Intrinsic Value Outstanding at December 31, 2012                                                                                                                | $ 854                    |
| Number of Rights Exercisable at December 31, 2012                                                                                                                         | 305,499                  |
| Weighted Average Exercise Price Exercisable at December 31, 2012                                                                                                          | $ 6.68                   |
| Remaining Contractual Term Exercisable at December 31, 2012                                                                                                               | 4 years 4 months 24 days |
| Aggregate Intrinsic Value Exercisable at December 31, 2012                                                                                                                | $ 517                    |

| X                                                                                                                                                                                                                                                                                                                                                                                           |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Share based compensation arrangement by share based payment award non option equity instruments exercisable.
+ References
No definition available.
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Exercisable Aggregate Intrinsic Value.
+ References
No definition available.
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Exercisable Weighted Average Exercise Price.
+ References
No definition available.
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Exercisable Weighted Average Remaining Contractual Terms.
+ References
No definition available.
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Forfeitures In Period Weighted Average Exercise Price
+ References
No definition available.
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| X                                                                                                                                                                                                                                                                                                                                                                                                         |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Share Based Payment Award Non Option Equity Instruments Outstanding Aggregate Intrinsic Value.
+ References
No definition available.
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Outstanding Weighted Average Exercise Price.
+ References
No definition available.
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Outstanding Weighted Average Remaining Contractual Terms.
+ References
No definition available.
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Share Based Compensation Arrangements By Share Based Payment Award Non Option Equity Instruments Exercises In Period Weighted Average Exercise Price
+ References
No definition available.
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Share Based Compensation Arrangements By Share Based Payment Award Non Option Equity Instruments Grants In Period Weighted Average Exercise Price
+ References
No definition available.
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| X                                                                                                                                                                                                      |
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Number of non-option equity instruments exercised by participants.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Number of shares under non-option equity instrument agreements that were cancelled as a result of occurrence of a terminating event.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Net number of non-option equity instruments granted to participants.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Number of shares reserved for issuance under non-option equity instrument agreements awarded that validly exist and are outstanding, including vested instruments.
+ References
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