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EMPLOYEE BENEFITS - Expected Future Benefit Payments (Details)
$ in Thousands
Dec. 31, 2015
USD ($)
Defined Benefit Pension Plan  
Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity [Abstract]  
2016 $ 2,921
2017 3,243
2018 3,565
2019 3,779
2020 3,980
2021 through 2025 22,707
Total expected future payments 40,195
Defined Benefit Pension Plan Acquired  
Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity [Abstract]  
2016 112
2017 56
2018 67
2019 76
2020 230
2021 through 2025 842
Total expected future payments 1,383
Restoration Plan  
Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity [Abstract]  
2016 346
2017 570
2018 618
2019 668
2020 726
2021 through 2025 4,406
Total expected future payments $ 7,334