PENSION PLAN - Plan Asset Allocations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Pension Plan Asset Allocations
Plan Assets	100.00%	100.00%
Estimated Amortization Over Next Fiscal Year
Estimated net loss (gain) expected to be amortized from accumulated other comprehensive income into net periodic cost	$ 241
Cash
Pension Plan Asset Allocations
Plan Assets	16.00%	10.00%
Fixed income
Pension Plan Asset Allocations
Plan Assets	28.00%	20.00%
Alternative investments
Pension Plan Asset Allocations
Plan Assets	9.00%	19.00%
Domestic equities
Pension Plan Asset Allocations
Plan Assets	28.00%	32.00%
Foreign equities
Pension Plan Asset Allocations
Plan Assets	19.00%	19.00%