Equity-Based Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2020

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Activity of Unvested Restricted Stock and Stock Unit Awards

A summary of the activity of our unvested restricted stock and stock unit awards are presented in the following table:

	Shares/units (in thousands)			Weighted Average Grant-Date Fair Value
Unvested at December 31, 2017		1,307		$	11.55
Granted		730			9.35
Vested and distributed		(457	)		10.91
Forfeited		(164	)		11.31
Unvested at December 31, 2018		1,416		$	10.65
Granted		437			5.39
Vested and distributed		(779	)		9.16
Forfeited		(81	)		10.74
Unvested at December 31, 2019		993		$	9.50
Granted		1,656			2.12
Vested and distributed		(820	)		5.44
Forfeited		(258	)		2.96
Unvested at December 31, 2020		1,571		$	4.90

Summary of Vesting Provisions for Restricted Stock and Stock Unit Awards

The vesting provisions for the restricted stock and stock unit awards and the related number of shares granted during the year ended December 31 are as follows:

	Shares/units (in thousands)
Vesting Terms	2020		2019		2018
50% immediately and 50% on the 1 year anniversary of grant date		—		162		—
100% immediately		129		186		132
33.3% per year for three years		15		89		452
33.3% after 30 days and 33.3% on the 1 and 2 year anniversary of grant date		12		—		—
25% immediately and 25% on the 1, 2 and 3 year anniversary of grant date		1,500		—		—
100% on July 31, 2018		—		—		146
Total restricted stock and stock units granted		1,656		437		730