Equity Based Compensation (Tables)

3 Months Ended

Mar. 31, 2019

Disclosure Of Compensation Related Costs Equity Based Payments [Abstract]

Schedule of Assumptions Used in Measurement of Grant Date Fair Value of Total Shareholder Return RSUs Using Monte Carlo Simulation Model

The grant date fair value of the TSR RSUs was measured using a Monte Carlo simulation model based on the following assumptions:

Volatility	18	%
Risk free rate	2.57	%

Schedule of Information about Equity Incentive Plan Activity

The following table presents information about Equity Incentive Plan activity during the three months ended March 31, 2019:

	Restricted Stock Awards				Restricted Stock Units
	Shares		Weighted Average Grant Date Fair Value		Units		Weighted Average Grant Date Fair Value
Unvested restricted common stock outstanding, January 1, 2019		691,290	$	13.68		—	$	—
Granted		46,368		14.12		89,314	23.07
Vested		—		—		—		—
Forfeited		—		—		—		—
Unvested restricted common stock outstanding, March 31, 2019		737,658	$	13.71		89,314	$	23.07

Schedule of Information about Unvested Class B and Class D Units

The following table presents information about the unvested Class B and Class D units during the three months ended March 31, 2019 and 2018:

	Class B Units			Class D Units			Total
Unvested units outstanding, January 1, 2018		6,940			2,400			9,340
Granted		—			—			—
Vested		(1,610	)		(600	)		(2,210	)
Forfeited		—			—			—
Unvested units outstanding, March 31, 2018		5,330			1,800			7,130
Unvested units outstanding, January 1, 2019		5,230			1,800			7,030
Granted		—			—			—
Vested		(1,610	)		(600	)		(2,210	)
Forfeited		—			—			—
Unvested units outstanding, March 31, 2019		3,620			1,200			4,820

Schedule of Per Unit Fair Value of Unvested Class D Units Estimated Using Assumptions as of Valuation Dates

The per unit fair value of unvested Class D units was estimated using the following assumptions as of March 31, 2018:

	March 31, 2018
Volatility		45	%
Risk free rate		1.71	%
Marketability discount		15	%