EMPLOYEE BENEFIT PLANS - Defined Benefit Plan Assets by Category (Details) - Successor - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Jan. 31, 2015
Defined Benefit Pension Plan
EMPLOYEE BENEFIT PLANS
Total investments	$ 201,843	$ 196,042	$ 201,820
Employer contribution receivable	0	0
Total	201,843	196,042
Defined Benefit Pension Plan | Cash and cash equivalents
EMPLOYEE BENEFIT PLANS
Total investments	4,175	3,121
Defined Benefit Pension Plan | Collective Russell 3000 index fund
EMPLOYEE BENEFIT PLANS
Total investments	67,627	72,663
Defined Benefit Pension Plan | Fidelity Spartan 500 index fund
EMPLOYEE BENEFIT PLANS
Total investments	58,815	52,551
Defined Benefit Pension Plan | Fixed Income
EMPLOYEE BENEFIT PLANS
Total investments	71,226	67,707
Group life insurance plan | Money market fund
EMPLOYEE BENEFIT PLANS
Total investments	$ 5,362	$ 5,653