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Employee Benefit Plans | 6 Months Ended
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Sep. 30, 2012
Compensation and Retirement Disclosure [Abstract] |
13. Employee Benefit Plans | 13. Employee Benefit Plans The components of the net periodic benefit costs with respect to postretirement benefits were as follows:
|  | Quarter Ended September 30, |
|  | 2012 |  |  | 2011 |
|  | (Unaudited) |
|  | (In thousands) |
Service cost for benefits earned during the period |  | $ | 156 |  |  | $ | 128 |
Interest cost on accumulated postretirement benefit |  |  | 138 |  |  |  | 142 |
Other components |  |  | 1 |  |  |  | (4 | )
Net periodic postretirement benefit cost |  | $ | 295 |  |  | $ | 266 |
|  | Six Months Ended September 30, |
|  | 2012 |  |  | 2011 |
|  | (Unaudited) |
|  | (In thousands) |
Service cost for benefits earned during the period |  | $ | 311 |  |  | $ | 257 |
Interest cost on accumulated postretirement benefit |  |  | 277 |  |  |  | 284 |
Other components |  |  | 2 |  |  |  | (8 | )
Net periodic postretirement benefit cost |  | $ | 590 |  |  | $ | 533 |

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- Definition The entire disclosure for postemployment benefits, which may include supplemental unemployment benefits, obligations recognized for all types of benefits provided to former or inactive employees, their beneficiaries, and covered dependents after employment but before retirement. Disclosure may also include discussion that an obligation for postemployment benefits is not accrued in accordance with regulation only because the amount cannot be reasonably estimated. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 712 -SubTopic 10 -Section 25 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6410138&loc=d3e79691-111665 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 712 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6410195&loc=d3e80090-111668 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 112 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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