EMPLOYEE RETIREMENT PLANS - Amounts to be Amortized from Accumulated Other Comprehensive Loss into Net Periodic Pension Cost in Next Fiscal Year (Details) $ in Thousands	12 Months Ended
Dec. 31, 2016 USD ($)
Estimated amounts to be amortized from accumulated other comprehensive loss in next fiscal year [Abstract]
Amortization of prior service cost	$ 1,660
Amortization of loss	188
Total	$ 1,848

Amount included in accumulated other comprehensive income (AOCI) expected to be recognized as components of net periodic benefit cost for the fiscal year that follows the most recent annual statement of financial position, including gain (loss), prior service cost (credit), and transition asset (obligation).

No definition available.

Name:	us-gaap_DefinedBenefitPlanAmountToBeAmortizedFromAccumulatedOtherComprehensiveIncomeLossNextFiscalYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration