EMPLOYEE BENEFIT PLANS (Details) - USD ($) $ in Thousands	1 Months Ended	2 Months Ended	3 Months Ended
	Jan. 31, 2015	Mar. 31, 2015	Mar. 31, 2016
Defined Benefit Pension Plan | Minimum
EMPLOYEE BENEFIT PLANS
Adjusted funding target percentage to be maintained			80.00%
Successor | Defined Benefit Pension Plan
EMPLOYEE BENEFIT PLANS
Service cost — benefits earned during the period		$ 1,982	$ 2,906
Interest cost on projected benefit obligation		1,622	2,737
Expected return on plan assets		(2,428)	(3,605)
Amortization of prior service cost		0	0
Amortization of actuarial losses		0	0
Total net periodic benefit costs		1,176	2,038
Successor | Unfunded Excess Benefits Plan
EMPLOYEE BENEFIT PLANS
Service cost — benefits earned during the period		222	313
Interest cost on projected benefit obligation		272	438
Expected return on plan assets		0	0
Amortization of prior service cost		0	0
Amortization of actuarial losses		0	0
Total net periodic benefit costs		$ 494	$ 751
Predecessor | Defined Benefit Pension Plan
EMPLOYEE BENEFIT PLANS
Service cost — benefits earned during the period	$ 974
Interest cost on projected benefit obligation	1,002
Expected return on plan assets	(1,293)
Amortization of prior service cost	(33)
Amortization of actuarial losses	668
Total net periodic benefit costs	1,318
Predecessor | Unfunded Excess Benefits Plan
EMPLOYEE BENEFIT PLANS
Service cost — benefits earned during the period	95
Interest cost on projected benefit obligation	140
Expected return on plan assets	0
Amortization of prior service cost	1
Amortization of actuarial losses	138
Total net periodic benefit costs	$ 374