EMPLOYEE BENEFIT PLANS - Fair Value of Pension Plan Assets by Asset Category (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan Disclosure
Fair value of pension plan assets	$ 13,989	$ 14,157	$ 15,350
Level 1
Defined Benefit Plan Disclosure
Fair value of pension plan assets	13,989	14,157
Cash.
Defined Benefit Plan Disclosure
Fair value of pension plan assets	19	4
Cash. | Level 1
Defined Benefit Plan Disclosure
Fair value of pension plan assets	19	4
Money Market Funds
Defined Benefit Plan Disclosure
Fair value of pension plan assets	888	403
Money Market Funds | Level 1
Defined Benefit Plan Disclosure
Fair value of pension plan assets	888	403
Large Cap Equity Mutual Funds
Defined Benefit Plan Disclosure
Fair value of pension plan assets		2,831
Large Cap Equity Mutual Funds | Level 1
Defined Benefit Plan Disclosure
Fair value of pension plan assets		2,831
Small Cap Equity Mutual Funds
Defined Benefit Plan Disclosure
Fair value of pension plan assets		94
Small Cap Equity Mutual Funds | Level 1
Defined Benefit Plan Disclosure
Fair value of pension plan assets		94
Global Equity Mutual Funds
Defined Benefit Plan Disclosure
Fair value of pension plan assets		882
Global Equity Mutual Funds | Level 1
Defined Benefit Plan Disclosure
Fair value of pension plan assets		882
International Equity Mutual Funds
Defined Benefit Plan Disclosure
Fair value of pension plan assets		3,019
International Equity Mutual Funds | Level 1
Defined Benefit Plan Disclosure
Fair value of pension plan assets		3,019
Absolute Return Funds
Defined Benefit Plan Disclosure
Fair value of pension plan assets		1,305
Absolute Return Funds | Level 1
Defined Benefit Plan Disclosure
Fair value of pension plan assets		1,305
EFT - International Equity
Defined Benefit Plan Disclosure
Fair value of pension plan assets		729
EFT - International Equity | Level 1
Defined Benefit Plan Disclosure
Fair value of pension plan assets		729
Taxable Bond Mutual Funds
Defined Benefit Plan Disclosure
Fair value of pension plan assets	13,082	4,890
Taxable Bond Mutual Funds | Level 1
Defined Benefit Plan Disclosure
Fair value of pension plan assets	$ 13,082	$ 4,890