Equity-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2017

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Schedule of Time-Vesting and Performance Vesting Restricted Share Awards

The activity related to the Company’s time-vesting and performance-vesting restricted share awards during the year ended December 31, 2017 is as follows:

						Performance-Vesting Restricted shares
	Time-Vesting Restricted shares					Bonus Performance Restricted shares					Long-Term Incentive Performance Restricted shares					2.75x Performance Restricted shares
	Shares			Weighted Average GrantDate Fair Value per Share		Shares			Weighted Average Grant Date Fair Value per Share		Shares			Weighted Average Grant Date Fair Value per Share		Shares			Weighted Average Grant Date Fair Value per Share
Outstanding at    December 31, 2016		1,323,025		$	17.47		451,289		$	17.88		212,369		$	18.43		1,310,726		$	8.19
Granted		1,290,057		$	16.91		923,678		$	18.10		791,108		$	18.57		—			—
Vested		(449,904	)	$	17.18		—			—		—			—		(455,148	)	$	13.24
Forfeited		(310,666	)	$	17.80		(569,722	)	$	17.95		(138,905	)	$	18.75		(238,785	)	$	13.11
Outstanding at    December 31, 2017		1,852,512		$	17.09		805,245		$	18.09		864,572		$	18.50		616,793		$	3.56

Schedule of Activity Related to Stock Option Awards

The activity related to the Company’s stock option awards during the year ended December 31, 2017:

	Options			Weighted Average ExercisePrice		Weighted Average Remaining Contractual Life (in years)		Aggregate Intrinsic Value
Outstanding at December 31, 2016		3,441,900		$	18.67
Forfeited		(415,400	)	$	18.04
Expired		(102,462	)	$	18.16
Exercised		(590	)	$	18.67
Outstanding at December 31, 2017		2,923,448		$	18.78		7.65	$	—
Exercisable at December 31, 2017		1,205,227		$	19.01		7.52	$	—