STOCK-BASED COMPENSATION AND INCENTIVE PLANS (Tables)

12 Months Ended

Dec. 31, 2019

Schedule of Common Stock Shares Reserved for Issuance and Shares Available for Grant

The number of common stock shares reserved for issuance under the plans and the number of shares available for future grants are as follows:

	Successor						Predecessor
					Period from		Period from
	Year		Year		August 1, 2017		April 1, 2017
	Ended		Ended		through		through
	December 31, 2019		December 31, 2018		December 31, 2017		July 31, 2017
Shares of common stock reserved for issuance under the plans		3,973,228		3,973,228		3,048,877		—
Shares of common stock available for future grants		2,187,101		2,325,102		1,891,231		—

Restricted Stock Units (RSUs)

Summary Of Restricted Stock Unit Activity

The following table sets forth a summary of our restricted stock unit activity:

	Weighted-average Grant-Date Fair Value		Time Based Units			Weight-average Grant Date Fair Value		Performance Based Units
Non-vested balance at March 31, 2017 (Predecessor)	$	54.48		183			—		—
Vested		54.48		(183	)		—		—
Non-vested balance at August 1, 2017 (Successor)		—		—			—		—
Granted		24.40		1,203,379			—		—
Cancelled/forfeited		24.15		(45,733	)		—		—
Non-vested balance at December 31, 2017 (Successor)		24.41		1,157,646			—		—
Granted		24.58		455,063			26.04		63,365
Vested		24.84		(503,677	)		—		—
Cancelled/forfeited		27.15		(27,948	)		—		—
Non-vested balance at December 31, 2018 (Successor)		24.21		1,081,084			26.04		63,365
Granted		23.44		186,143			24.50		101,143
Vested		24.45		(784,868	)		—		—
Cancelled/forfeited		24.70		(78,591	)		24.50		(70,694	)
Non-vested balance at December 31, 2019 (Successor)	$	23.32		403,768			25.54		93,814

Schedule of Restricted Stock Compensation Expense and Grant Date Fair Value

Restricted stock unit compensation expense and grant date fair value are as follows:

	Successor						Predecessor
					Period from		Period from
	Year		Year		August 1, 2017		April 1, 2017
	Ended		Ended		through		through
(In thousands)	December 31, 2019		December 31, 2018		December 31, 2017		July 31, 2017
Grant date fair value of restricted stock units vested	$	19,193		12,513		—		10
Restricted stock unit compensation expense		19,603		13,406		3,731		2

Phantom Stock Plan

Schedule of Restricted Stock Compensation Expense and Grant Date Fair Value

Phantom stock compensation expense and grant date fair value of phantom stock vested are as follows:

		Successor						Predecessor
						Period from		Period from
		Year		Year		August 1, 2017		April 1, 2017
		Ended		Ended		through		through
(In thousands)		December 31, 2019		December 31, 2018		December 31, 2017		July 31, 2017
Grant date fair value of phantom stock vested	$		1,055		2,957		—		—
Phantom stock compensation expense		30			214		94		68

Summary of Phantom Stock Activity

The following table sets forth a summary of our phantom stock activity:

	Weighted-average Grant-Date Fair Value		Time Based Shares			Weighted-average Grant-Date Fair Value		Series A Warrants			Weighted-average Grant-Date Fair Value		Series B Warrants
Non-vested balance at March 31, 2017 (Predecessor)	$	9.74		946,150
Cancelled		9.70		(484,446	)
Forfeited		10.08		(16,866	)
Non-vested balance at July 31, 2017 (Predecessor)	$	9.77		444,838
Issuance of Successor phantom stock at August 1, 2017		308.19		14,160			1.00		22,963			0.98		24,824
Cancelled/forfeited		307.31		(634	)		1.00		(1,029	)		0.98		(1,112	)
Non-vested balance at December 31, 2017 (Successor)	$	308.24		13,526			1.00		21,934			0.98		23,712
Vested		360.14		(8,223	)		1.00		(13,009	)		0.98		(14,064	)
Cancelled		240.39		(786	)		1.00		(1,275	)		0.98		(1,379	)
Non-vested balance at December 31, 2018 (Successor)	$	226.50		4,517			1.00		7,650			2.94		8,269
Vested		226.50		(4,517	)		1.00		(7,650	)		2.94		(8,269	)
Non-vested balance at December 31, 2019 (Successor)	$	—		—			—		—			—		—