Stock Based Compensation (Tables)

12 Months Ended

Dec. 31, 2019

Summary of changes in outstanding restricted stock units

		Weighted-
		Average
		Grant-Date
	Shares	Fair Value
Outstanding as of December 31, 2018	68,649	$	6.25
Vested	(57,563)		3.15
Forfeited	(3,739)		22.01
Outstanding as of December 31, 2019	7,347	$	22.49

Summary of changes in number of outstanding cash performance units

	Cash Performance Awards
Outstanding as of December 31, 2018	425,012
Vested	(212,505)
Forfeited	(71,435)
Outstanding as of December 31, 2019	141,072

Omnibus Plan

Summary of outstanding and exercisable stock options

				Weighted-
		Weighted-		Average
		Average		Remaining
		Exercise		Contractual Term
	Options	Price		(in Years)
Outstanding as of December 31, 2018	910,627	$	14.99
Forfeited	(117,543)		15.48
Outstanding as of December 31, 2019	793,084	$	14.91	7.40
Options vested and exercisable as of December 31, 2019	542,513		19.01	7.15
Options vested and expected to vest as of December 31, 2019	793,084		14.91	7.40

Summary of activity in non-vested stock options

		Weighted-
		Average
		Grant-Date
	Number	Fair Value
Non-vested as of December 31, 2018	605,352	$	3.14
Forfeited	(78,676)		3.39
Vested	(276,105)		4.20
Non-vested as of December 31, 2019	250,571	$	1.90

Schedule of vesting for unvested options

2020	200,364
2021	50,207
Total unvested options as of December 31, 2019	250,571

Schedule of valuation assumptions

	December 31, 2018
Expected term in years	6.0
Volatility	48.0	%
Risk-free interest rate	2.7	%
Dividend yield	—	%

Weighted average grant date fair value of options granted

	Year Ended December 31,
	2019		2018
Weighted Average Grant-Date Fair Value of Options Granted	$	n/a	$	1.21