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Employee Benefit Plans (Tables) | 9 Months Ended
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Dec. 31, 2013
Pension Plans, Defined Benefit [Member] |
Components of Postretirement Benefit Income and Pension Cost | The components of pension cost are as follows:
|  | Three Months Ended December 31, |  |  |  | Nine Months Ended December 31,
|  |  |  | 2013 |  |  |  |  |  |  | 2012 |  |  |  |  |  |  |  |  | 2013 |  |  |  |  |  |  | 2012 |  |  |
Service cost |  |  |  |  | $144 |  |  |  |  |  |  |  | $136 |  |  |  |  |  |  |  |  |  | $ 432 |  |  |  |  |  |  |  | $ 408 |  |  |
Interest cost |  |  |  |  | 340 |  |  |  |  |  |  |  | 357 |  |  |  |  |  |  |  |  |  | 1,019 |  |  |  |  |  |  |  | 1,070 |  |  |
Expected return on assets |  |  |  |  | (682) |  |  |  |  |  |  |  | (684) |  |  |  |  |  |  |  |  |  | (2,046) |  |  |  |  |  |  |  | (2,053) |  |  |
Amortization of: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unrecognized prior service cost |  |  |  |  | 1 |  |  |  |  |  |  |  | 1 |  |  |  |  |  |  |  |  |  | 3 |  |  |  |  |  |  |  | 3 |  |  |
Actuarial loss |  |  |  |  | 250 |  |  |  |  |  |  |  | 252 |  |  |  |  |  |  |  |  |  | 751 |  |  |  |  |  |  |  | 758 |  |  |
Net pension cost |  |  |  |  | $ 53 |  |  |  |  |  |  |  | $ 62 |  |  |  |  |  |  |  |  |  | $ 159 |  |  |  |  |  |  |  | $ 186 |  |  |
Other Postretirement Benefit Plans [Member] |
Components of Postretirement Benefit Income and Pension Cost | The components of the postretirement benefit income are as follows:
|  | Three Months Ended |  | Nine Months Ended
|  | December 31, |  | December 31,
|  | 2013 |  | 2012 |  | 2013 |  | 2012
Service cost |  | $ - |  | $ - |  | $ - |  | $ -
Interest cost |  | 8 |  | 9 |  | 24 |  | 28
Amortization of prior service benefit |  | (41) |  | (41) |  | (124) |  | (124)
Amortization of actuarial loss |  | 11 |  | 10 |  | 33 |  | 29
Net postretirement benefit income |  | $(22) |  | $(22) |  | $(67) |  | $ (67)

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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 + Details
Name: | us-gaap_ScheduleOfNetBenefitCostsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration