Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2023

Equity [Abstract]

Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan

The following table summarizes our compensation costs recognized in General and administrative expense (excluding depreciation) and Operating expense (excluding depreciation) under the Amended and Restated Incentive Plan and Stock Purchase Plan (in thousands):

	Years Ended December 31,
	2023		2022		2021
Restricted Stock Awards	$	7,774	$	5,172	$	4,657
Restricted Stock Units	1,931		1,451		1,356
Stock Option Awards	1,637		2,540		1,939

Schedule of Restricted Stock Awards and Restricted Stock Units and Performance Restricted Stock Units

The following tables summarize our restricted stock activity (in thousands, except per share amounts):

	Shares	Weighted- Average Grant Date Fair Value
Unvested balance at December 31, 2022	794	$	16.24
Granted	428	26.30
Vested	(375)	17.81
Forfeited	(21)	19.20
Unvested balance at December 31, 2023	826	$	20.90

	Years Ended December 31,
	2023		2022		2021
Weighted-average grant-date fair value per share of restricted stock awards and restricted stock units granted (in dollars)	$	26.30	$	15.27	$	16.38
Fair value of restricted stock awards and restricted stock units vested	$	6,677	$	5,718	$	4,370

The following tables summarize our performance restricted stock activity (in thousands, except per unit amounts):

	Units	Weighted- Average Grant Date Fair Value
Unvested balance at December 31, 2022	113	$	16.78
Granted	90	27.47
Vested	(36)	19.17
Forfeited	—	—
Unvested balance at December 31, 2023	167	$	22.03

	Years Ended December 31,
	2023		2022		2021
Weighted-average grant-date fair value per share of performance restricted stock units granted (in dollars)	$	27.47	$	14.91	$	16.52
Fair value of performance restricted stock units vested	$	686	$	1,343	$	940

Schedule of Weighted Average Assumptions

	2022	2021
Expected life from date of grant (in years)	5.3	5.3
Expected volatility	55.4%	53.2%
Risk-free interest rate	1.83%	0.64%

Schedule of Share-based Compensation, Stock Options, Activity

The following table summarizes our stock option activity (in thousands, except per share amounts and term years):

	Number of Options	Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Term in Years	Aggregate Intrinsic Value
Outstanding balance at December 31, 2022	2,020	$	17.92	4.3	$	10,779
Issued	—	—
Exercised	(705)	19.68
Forfeited / canceled / expired	—	—
Outstanding balance at December 31, 2023	1,315	$	16.97	4.1	$	25,509
Exercisable, end of year	873	$	17.60	3.2	$	16,390