EMPLOYEE BENEFIT PLANS - Plan Assets at Fair Value (Details) - USD ($) $ in Thousands	1 Months Ended	11 Months Ended	12 Months Ended
	Jan. 31, 2015	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Successor | Defined Benefit Pension Plan
Fair value hierarchy of Plan's assets
Total investments	$ 201,820	$ 196,042	$ 196,042	$ 196,042
Reconciliation of beginning and ending balances for fair value measurements for which significant unobservable inputs (level 3) are used
Fair value of plan assets at beginning of year		201,820	196,042
Fair value of plan assets at end of year	201,820	196,042	201,843	196,042
Successor | Defined Benefit Pension Plan | Collective short-term investment fund
Fair value hierarchy of Plan's assets
Total investments		3,121	$ 3,121	$ 3,121
Redemption Notice Period			1 day	1 day
Reconciliation of beginning and ending balances for fair value measurements for which significant unobservable inputs (level 3) are used
Fair value of plan assets at beginning of year			$ 3,121
Fair value of plan assets at end of year		3,121	4,175	$ 3,121
Successor | Defined Benefit Pension Plan | Equity index funds
Fair value hierarchy of Plan's assets
Total investments		125,214	125,214	125,214
Reconciliation of beginning and ending balances for fair value measurements for which significant unobservable inputs (level 3) are used
Fair value of plan assets at beginning of year			125,214
Fair value of plan assets at end of year		125,214	126,442	125,214
Successor | Defined Benefit Pension Plan | Group deposit administration annuity contract
Fair value hierarchy of Plan's assets
Total investments		67,707	67,707	67,707
Reconciliation of beginning and ending balances for fair value measurements for which significant unobservable inputs (level 3) are used
Fair value of plan assets at beginning of year			67,707
Fair value of plan assets at end of year		67,707	71,226	67,707
Successor | Defined Benefit Pension Plan | Equity securities: Collective Russell 3000 index fund
Fair value hierarchy of Plan's assets
Total investments		72,663	$ 72,663	$ 72,663
Redemption Notice Period			1 day	1 day
Reconciliation of beginning and ending balances for fair value measurements for which significant unobservable inputs (level 3) are used
Fair value of plan assets at beginning of year			$ 72,663
Fair value of plan assets at end of year		72,663	67,627	$ 72,663
Successor | Defined Benefit Pension Plan | Equity securities: Fidelity Spartan 500 index fund
Fair value hierarchy of Plan's assets
Total investments		52,551	$ 52,551	$ 52,551
Redemption Notice Period			1 day	1 day
Reconciliation of beginning and ending balances for fair value measurements for which significant unobservable inputs (level 3) are used
Fair value of plan assets at beginning of year			$ 52,551
Fair value of plan assets at end of year		52,551	58,815	$ 52,551
Successor | Defined Benefit Pension Plan | Level 1
Fair value hierarchy of Plan's assets
Total investments		55,672	55,672	55,672
Reconciliation of beginning and ending balances for fair value measurements for which significant unobservable inputs (level 3) are used
Fair value of plan assets at beginning of year			55,672
Fair value of plan assets at end of year		55,672	62,990	55,672
Successor | Defined Benefit Pension Plan | Level 1 | Collective short-term investment fund
Fair value hierarchy of Plan's assets
Total investments		3,121	3,121	3,121
Reconciliation of beginning and ending balances for fair value measurements for which significant unobservable inputs (level 3) are used
Fair value of plan assets at beginning of year			3,121
Fair value of plan assets at end of year		3,121	4,175	3,121
Successor | Defined Benefit Pension Plan | Level 1 | Equity index funds
Fair value hierarchy of Plan's assets
Total investments		52,551	52,551	52,551
Reconciliation of beginning and ending balances for fair value measurements for which significant unobservable inputs (level 3) are used
Fair value of plan assets at beginning of year			52,551
Fair value of plan assets at end of year		52,551	58,815	52,551
Successor | Defined Benefit Pension Plan | Level 1 | Group deposit administration annuity contract
Fair value hierarchy of Plan's assets
Total investments		0	0	0
Reconciliation of beginning and ending balances for fair value measurements for which significant unobservable inputs (level 3) are used
Fair value of plan assets at beginning of year			0
Fair value of plan assets at end of year		0	0	0
Successor | Defined Benefit Pension Plan | Level 2
Fair value hierarchy of Plan's assets
Total investments		72,663	72,663	72,663
Reconciliation of beginning and ending balances for fair value measurements for which significant unobservable inputs (level 3) are used
Fair value of plan assets at beginning of year			72,663
Fair value of plan assets at end of year		72,663	67,627	72,663
Successor | Defined Benefit Pension Plan | Level 2 | Collective short-term investment fund
Fair value hierarchy of Plan's assets
Total investments		0	0	0
Reconciliation of beginning and ending balances for fair value measurements for which significant unobservable inputs (level 3) are used
Fair value of plan assets at beginning of year			0
Fair value of plan assets at end of year		0	0	0
Successor | Defined Benefit Pension Plan | Level 2 | Equity index funds
Fair value hierarchy of Plan's assets
Total investments		72,663	72,663	72,663
Reconciliation of beginning and ending balances for fair value measurements for which significant unobservable inputs (level 3) are used
Fair value of plan assets at beginning of year			72,663
Fair value of plan assets at end of year		72,663	67,627	72,663
Successor | Defined Benefit Pension Plan | Level 2 | Group deposit administration annuity contract
Fair value hierarchy of Plan's assets
Total investments		0	0	0
Reconciliation of beginning and ending balances for fair value measurements for which significant unobservable inputs (level 3) are used
Fair value of plan assets at beginning of year			0
Fair value of plan assets at end of year		0	0	0
Successor | Defined Benefit Pension Plan | Level 3
Fair value hierarchy of Plan's assets
Total investments	64,581	67,707	67,707	67,707
Reconciliation of beginning and ending balances for fair value measurements for which significant unobservable inputs (level 3) are used
Fair value of plan assets at beginning of year		64,581	67,707
Interest income		3,126	3,519
Transfers from collective short-term investments fund		0	0
Transfers to collective short-term investments fund		0	0
Fair value of plan assets at end of year	64,581	67,707	71,226	67,707
Successor | Defined Benefit Pension Plan | Level 3 | Collective short-term investment fund
Fair value hierarchy of Plan's assets
Total investments		0	0	0
Reconciliation of beginning and ending balances for fair value measurements for which significant unobservable inputs (level 3) are used
Fair value of plan assets at beginning of year			0
Fair value of plan assets at end of year		0	0	0
Successor | Defined Benefit Pension Plan | Level 3 | Equity index funds
Fair value hierarchy of Plan's assets
Total investments		0	0	0
Reconciliation of beginning and ending balances for fair value measurements for which significant unobservable inputs (level 3) are used
Fair value of plan assets at beginning of year			0
Fair value of plan assets at end of year		0	0	0
Successor | Defined Benefit Pension Plan | Level 3 | Group deposit administration annuity contract
Fair value hierarchy of Plan's assets
Total investments		67,707	67,707	67,707
Reconciliation of beginning and ending balances for fair value measurements for which significant unobservable inputs (level 3) are used
Fair value of plan assets at beginning of year			67,707
Fair value of plan assets at end of year		67,707	71,226	67,707
Successor | Group life insurance plan | Money Market Funds [Member]
Fair value hierarchy of Plan's assets
Total investments		5,653	5,653	5,653
Reconciliation of beginning and ending balances for fair value measurements for which significant unobservable inputs (level 3) are used
Fair value of plan assets at beginning of year			5,653
Fair value of plan assets at end of year		5,653	5,362	5,653
Successor | Group life insurance plan | Level 1 | Money Market Funds [Member]
Fair value hierarchy of Plan's assets
Total investments		5,653	5,653	5,653
Reconciliation of beginning and ending balances for fair value measurements for which significant unobservable inputs (level 3) are used
Fair value of plan assets at beginning of year			5,653
Fair value of plan assets at end of year		5,653	5,362	5,653
Successor | Group life insurance plan | Level 2 | Money Market Funds [Member]
Fair value hierarchy of Plan's assets
Total investments		0	0	0
Reconciliation of beginning and ending balances for fair value measurements for which significant unobservable inputs (level 3) are used
Fair value of plan assets at beginning of year			0
Fair value of plan assets at end of year		0	0	0
Successor | Group life insurance plan | Level 3 | Money Market Funds [Member]
Fair value hierarchy of Plan's assets
Total investments		0	0	0
Reconciliation of beginning and ending balances for fair value measurements for which significant unobservable inputs (level 3) are used
Fair value of plan assets at beginning of year			0
Fair value of plan assets at end of year		0	$ 0	0
Predecessor | Defined Benefit Pension Plan
Fair value hierarchy of Plan's assets
Total investments	203,772	201,820		203,772
Reconciliation of beginning and ending balances for fair value measurements for which significant unobservable inputs (level 3) are used
Fair value of plan assets at beginning of year	203,772	201,820		203,772
Fair value of plan assets at end of year	201,820
Predecessor | Defined Benefit Pension Plan | Level 3
Fair value hierarchy of Plan's assets
Total investments	64,296	64,581		64,296
Reconciliation of beginning and ending balances for fair value measurements for which significant unobservable inputs (level 3) are used
Fair value of plan assets at beginning of year	64,296	$ 64,581		$ 64,296
Interest income	285
Transfers from collective short-term investments fund	0
Transfers to collective short-term investments fund	0
Fair value of plan assets at end of year	$ 64,581