Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2019

Stockholders' Equity

Summary of stock option activity

The following table summarizes stock option activity for the years ended December 31, 2019 and 2018 (shares and intrinsic values in thousands):

				Weighted-
				average
		Weighted-		remaining	Aggregate
	Number of	average exercise		contractual	intrinsic
	shares	price		term	value
Outstanding at December 31, 2017	2,898	$	11.62	6.5	$	1,738
Granted	109		12.84	6.0		—
Exercised	(67)		13.38	—		—
Forfeited	(24)		12.30	—		—
Expired	(6)		12.10	—		—
Outstanding at December 31, 2018	2,910	$	11.62	5.6	$	2,806
Granted	1,025		12.06	6.0		—
Exercised	(60)		11.63	—		—
Forfeited	—		—	—		—
Expired	(20)		13.64	—		—
Outstanding at December 31, 2019	3,855	$	11.72	6.1	$	12,101
Vested at December 31, 2019	2,732	$	11.57	4.6	$	9,016
Exercisable at December 31, 2019	2,732	$	11.57	4.6	$	9,016

Summary of restricted share activity

The following table summarizes restricted share activity for the years ended December 31, 2019 and 2018 (shares in thousands):

	Number of	Weighted-average
	shares	grant date fair value
Outstanding at December 31, 2017	504	$	10.23
Granted	93		11.85
Vested	(218)		11.49
Forfeited	(9)		11.85
Outstanding at December 31, 2018	370	$	9.86
Granted	581		12.37
Vested	(352)		9.78
Forfeited	(7)		14.55
Outstanding at December 31, 2019	592	$	12.32

Time Based Stock Option | Black Scholes Pricing Model

Stockholders' Equity

Schedule of valuation assumptions

	Year Ended		Year Ended
Black-Scholes Option Valuation Assumptions	December 31, 2019		December 31, 2018
Risk-free interest rate	1.6	%	2.7	%	-	3.0	%
Dividend yield	—					—
Volatility	40.3	%	39.0	%	-	41.0	%
Weighted-average expected term (years)	6.0					6.0