EMPLOYEE BENEFIT PLANS - Schedule of Fair Value of Plan Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	$ 73,619	$ 81,899	$ 67,967
Other Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	73,619	80,805
Other Pension Plan | Quoted Prices in Active Markets for Identical Items (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	1,119	651
Other Pension Plan | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	72,500	80,154
Other Pension Plan | Cash
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	1,119	651
Other Pension Plan | Cash | Quoted Prices in Active Markets for Identical Items (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	1,119	651
Other Pension Plan | Equity Index
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		2,785
Other Pension Plan | Equity Index | Quoted Prices in Active Markets for Identical Items (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0
Other Pension Plan | Equity Index | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		2,785
Other Pension Plan | Diversified Growth Fund
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	12,330	17,296
Other Pension Plan | Diversified Growth Fund | Quoted Prices in Active Markets for Identical Items (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0
Other Pension Plan | Diversified Growth Fund | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	12,330	17,296
Other Pension Plan | Global Equity Fund
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	1,835
Other Pension Plan | Global Equity Fund | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	1,835
Other Pension Plan | Global Absolute Return Fund
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		6,534
Other Pension Plan | Global Absolute Return Fund | Quoted Prices in Active Markets for Identical Items (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0
Other Pension Plan | Global Absolute Return Fund | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		6,534
Other Pension Plan | Cash Fund
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		5,315
Other Pension Plan | Cash Fund | Quoted Prices in Active Markets for Identical Items (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0
Other Pension Plan | Cash Fund | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		5,315
Other Pension Plan | Global Absolute Return Bond Fund
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	18,570
Other Pension Plan | Global Absolute Return Bond Fund | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	18,570
Other Pension Plan | Corporate Bonds
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	7,472
Other Pension Plan | Corporate Bonds | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	7,472
Other Pension Plan | United Kingdom | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		17,809
Other Pension Plan | United Kingdom | Equity Securities | Quoted Prices in Active Markets for Identical Items (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0
Other Pension Plan | United Kingdom | Equity Securities | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		17,809
Other Pension Plan | United Kingdom | Fixed Income Securities
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	18,048	6,494
Other Pension Plan | United Kingdom | Fixed Income Securities | Quoted Prices in Active Markets for Identical Items (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0
Other Pension Plan | United Kingdom | Fixed Income Securities | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	18,048	6,494
Other Pension Plan | United Kingdom | Government Index Linked Securities
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	14,245	8,934
Other Pension Plan | United Kingdom | Government Index Linked Securities | Quoted Prices in Active Markets for Identical Items (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0
Other Pension Plan | United Kingdom | Government Index Linked Securities | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	$ 14,245	8,934
Other Pension Plan | United States | Equity Index
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		4,370
Other Pension Plan | United States | Equity Index | Quoted Prices in Active Markets for Identical Items (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0
Other Pension Plan | United States | Equity Index | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		4,370
Other Pension Plan | European | Equity Index
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		4,378
Other Pension Plan | European | Equity Index | Quoted Prices in Active Markets for Identical Items (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0
Other Pension Plan | European | Equity Index | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		4,378
Other Pension Plan | Pacific Rim | Equity Index
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		3,506
Other Pension Plan | Pacific Rim | Equity Index | Quoted Prices in Active Markets for Identical Items (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0
Other Pension Plan | Pacific Rim | Equity Index | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		3,506
Other Pension Plan | JAPAN | Equity Index
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		2,733
Other Pension Plan | JAPAN | Equity Index | Quoted Prices in Active Markets for Identical Items (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0
Other Pension Plan | JAPAN | Equity Index | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		$ 2,733