EMPLOYEE BENEFIT PLANS - Change in Accumulated Benefit Obligation and Plan Assets (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
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| CHANGE IN ACCUMULATED BENEFIT OBLIGATION | |||
| Accumulated benefit obligation at beginning of year | $ 197,222 | $ 200,375 | |
| Service cost | 58 | 71 | $ 86 |
| Interest cost | 8,493 | 9,331 | |
| Actuarial (gain) loss | 6,762 | 6,079 | |
| Benefits paid | (10,225) | (18,634) | |
| Accumulated Benefit obligation at end of year | 202,310 | 197,222 | 200,375 |
| CHANGE IN PLAN ASSETS | |||
| Market value of plan assets at beginning of year | 194,342 | 190,640 | |
| Actual return on plan assets | 35,788 | 19,080 | |
| Employer contribution | 0 | 3,256 | |
| Benefits paid | (10,225) | (18,634) | |
| Fair value of plan assets at end of year | 219,905 | 194,342 | $ 190,640 |
| Funded status | $ 17,595 | $ (2,880) | |
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- Definition Defined Benefit Plan, Change in Benefit Obligation Interest Cost No definition available.
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- Definition Amount of actuarial present value of benefits attributed to employee service rendered, excluding assumptions about future compensation level. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of increase (decrease) in plan assets of defined benefit plan from actual return (loss) determined by change in fair value of plan assets adjusted for contributions, benefit payments, and other expenses. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of gain (loss) from change in actuarial assumptions which (increases) decreases benefit obligation of defined benefit plan. Assumptions include, but are not limited to, interest, mortality, employee turnover, salary, and temporary deviation from substantive plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of payment to participant of defined benefit plan which decreases benefit obligation. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
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- Definition Amount of contribution received by defined benefit plan from employer which increases plan assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Fair value of assets that have been segregated and restricted to provide pension or postretirement benefits. Assets include, but are not limited to, stocks, bonds, other investments, earnings from investments, and contributions by the employer and employees. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of funded (unfunded) status of defined benefit plan, measured as difference between fair value of plan assets and benefit obligation. Includes, but is not limited to, overfunded (underfunded) status. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of payment to participant under defined benefit plan which decreases plan assets. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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