|
EMPLOYEE BENEFIT PLANS - Components of Net Periodic Pension and Other Post-retirement Benefit Cost (Detail) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | |
|---|---|---|
|
Mar. 31, 2015
|
Mar. 31, 2014
|
|
| Pension Benefits | ||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Service cost | $ 632 | $ 527 |
| Interest cost | 1,787 | 1,966 |
| Expected return on plan assets | (2,843) | (2,825) |
| Amortization of prior service cost | 228 | 228 |
| Amortization of actuarial loss | 1,223 | 1,358 |
| Net periodic benefit cost | 1,027 | 1,254 |
| Other Post-Retirement Benefits | ||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Service cost | 319 | 239 |
| Interest cost | 494 | 534 |
| Expected return on plan assets | 0 | 0 |
| Amortization of prior service cost | 0 | 172 |
| Amortization of actuarial loss | 95 | 24 |
| Net periodic benefit cost | $ 908 | $ 969 |