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PENSION AND POST RETIREMENT BENEFIT PLANS (Details) (USD $)
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3 Months Ended | 12 Months Ended | ||
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Mar. 31, 2012
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Mar. 31, 2011
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Dec. 31, 2011
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Dec. 31, 2012
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| Components of net periodic pension benefit Gain | ||||
| Interest and service cost | $ 2,337,000 | $ 2,520,000 | ||
| Expected return on plan assets | (2,961,000) | (3,016,000) | ||
| Amortization of net loss | 632,000 | 450,000 | ||
| Net periodic benefit gain | 8,000 | (46,000) | ||
| Contribution by employer | 2,100,000 | 4,100,000 | 4,900,000 | |
| Further contributions to defined benefit retirement plan during the fiscal year | $ 2,900,000 | |||
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- Definition
Represents the actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period and increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time. No definition available.
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- Definition
The amount of gains or losses recognized in net periodic benefit cost. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The increase in the fair value of plan assets from contributions made by the employer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The employer's best estimate, as soon as it can be reasonably determined, of contributions expected to be paid to the plan in the current remaining fiscal period. Estimated contributions may be presented in the aggregate combining (1) contributions required by funding regulations or laws, (2) discretionary contributions, and (3) noncash contributions. No definition available.
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- Definition
An amount calculated as a basis for determining the extent of delayed recognition of the effects of changes in the fair value of assets. The expected return on plan assets is determined based on the expected long-term rate of return on plan assets and the market-related value of plan assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The total amount of net periodic benefit cost for defined benefit plans for the period. Periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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