13. Stock-Based Compensation — The following tables illustrate the Company’s stock-based compensation, unamortized stock-based compensation, and remaining weighted average amortization period.

	Stock-Based Compensation for the Three months Period		Unamortized Stock-Based Compensation as of March 31		Remaining Weighted Average Period (years)
March 31, 2022
Time-Based Restricted Stock	$	993	$	5,411		1.7
Unrestricted Stock		117		78		0.2
Performance-Based Restricted Stock		453		2,319		1.7
Total	$	1,563	$	7,808

March 31, 2021
Time-Based Restricted Stock	$	1,057	$	5,703		1.8
Unrestricted Stock		110		73		0.2
Performance-Based Restricted Stock		625		2,698		1.8
Total	$	1,792	$	8,474

The Company also granted stock options in past periods. All outstanding stock options are fully vested and exercisable and no expense was recorded during the three months ended March 31, 2022 and 2021.

Restricted and Unrestricted Stock — A summary of nonvested time based restricted and unrestricted stock is presented below:

	Three Months Ended March 31, 2022					Three Months Ended March 31, 2021
	Number of Shares			Weighted Average Grant Date Fair Value		Number of Shares			Weighted Average Grant Date Fair Value
Nonvested shares at December 31^st		817,290		$	17.04		820,624		$	16.64
Vested		(230,080	)		17.31		(197,615	)		19.91
Forfeited		(24,109	)		17.10		(11,580	)		16.95
Nonvested shares at March 31^st		563,101		$	16.93		611,429		$	15.57

Performance-Based Restricted Stock — A summary of nonvested performance-based stock is presented below:

	Three Months Ended March 31, 2022					Three Months Ended March 31, 2021
	Number of Shares			Weighted Average Grant Date Fair Value		Number of Shares			Weighted Average Grant Date Fair Value
Nonvested shares at December 31^st		379,061		$	16.43		391,771		$	16.26
Additional granted (forfeited) based on performance achievement		(41,088	)		16.56		71,180			20.53
Vested		(78,704	)		17.18		(175,087	)		19.78
Forfeited		(7,074	)		16.77		(505	)		19.26
Nonvested shares at March 31^st		252,195		$	16.17		287,359		$	15.16

Stock Options — The Company has stock options outstanding under its incentive stock option plans and performance incentive stock option plan. All outstanding stock options are vested and exercisable.

There was no activity for the three months ended March 31, 2022. There were 108,036 of incentive stock options outstanding as of March 31, 2022, with an exercise price per share of $11.49 and a remaining life of 33 months.

Activity of the incentive stock option plans for the three months ended March 31, 2021:

	Number of Shares			Weighted Average Price Per Share
Balance outstanding, December 31, 2020		123,087		$	11.48
Options exercised		(5,838	)		11.49
Balance outstanding, March 31, 2021		117,249		$	11.48

	Outstanding Weighted Average
Exercise Price Per Share	Shares		Remaining Life (Months)		Exercise Price
Incentive Stock Option Plan:
		7,200		3	$	11.32
		110,049		45	$	11.49
		117,249			$	11.48

There was no activity for the three months ended March 31, 2022 and 2021. There were 114,658 of performance incentive stock options outstanding as of March 31, 2022 and 2021, with an exercise price per share of $11.49 and a remaining life of 33 and 45 months, respectively.