Equity-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2019

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 awards during the three months ended March 31, 2019 is as follows:

						Performance-Vesting Restricted shares/units
	Time-Vesting Restricted shares/units					Bonus Performance Restricted units					Long-Term Incentive Performance Restricted shares/units
	Shares/Units			Weighted Average Grant Date Fair Value per Share/Unit		Units			Weighted Average Grant Date Fair Value per Unit		Shares/Units			Weighted Average Grant Date Fair Value per Share/Unit
Outstanding at December 31, 2018		901,704		$	17.34		560,710		$	15.06		1,155,486		$	15.82
Granted		47,772		$	25.70		224,928		$	25.70		1,233,742		$	25.70
Vested		(87,079	)	$	17.12		(319,868	)	$	15.06		(27,877	)	$	15.24
Forfeited		(121,518	)	$	16.33		(246,678	)	$	15.32		(285,428	)	$	18.11
Outstanding at March 31, 2019		740,879		$	18.07		219,092		$	25.70		2,075,923		$	21.39

Schedule of Activity Related to Stock Option Awards

The activity related to the Company’s stock option awards during the three months ended March 31, 2019 is as follows:

	Options			Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (in years)		Aggregate Intrinsic Value (in thousands)
Outstanding at December 31, 2018		764,577		$	18.05
Granted		430,390		$	25.70
Forfeited		(55,379	)	$	19.36
Expired		(8,593	)	$	18.52
Exercised		(39,928	)	$	17.90
Outstanding at March 31, 2019		1,091,067		$	21.00		7.85	$	5,188
Exercisable at March 31, 2019		556,676		$	18.28		6.47	$	4,163

Schedule of Stock Options Valuation Assumptions

The weighted average grant date fair value of stock options granted during the three months ended March 31, 2019 was $8.45. Key weighted-average assumptions utilized in the Black-Scholes Option Pricing Model for stock options granted during the three months ended March 31, 2019 were:

Risk-free interest rate	2.48	%
Expected volatility (a)	28.50	%
Expected dividend yield	0.00	%
Expected life (years) (b)	6.00

(a) Due to the Company’s limited history as a public company, the volatility for the Company’s stock at the date of each grant was estimated using the average volatility calculated for a peer group, which is based upon daily price observations over the estimated term of options granted.

(b) The expected life was estimated using the simplified method, as the Company does not have sufficient historical exercise data due to the limited period of time its common stock has been publicly traded.