Share-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2023

Share-Based Payment Arrangement [Abstract]

Summary of Company's Stock Option Plan Activity

The following table summarizes the stock option activity for the six months ended June 30, 2023:

Dollars and shares in thousands, except per share amounts	Number of Shares			Weighted-Average Exercise Price Per Share		Weighted-Average Remaining Contractual Life (Years)		Aggregate Intrinsic Value
Options outstanding at January 1, 2023		527		$	23.07
Granted		—			—
Exercised		(18	)		16.09
Forfeited		—			—
Expired		—			—
Options outstanding at June 30, 2023		509		$	23.32		5.5	$	3,684
Options exercisable at June 30, 2023		457		$	22.57		5.3	$	3,641

Summary of Additional Stock Option Information

The following table provides additional stock option information for the periods indicated:

	Three Months Ended June 30,				Six Months Ended June 30,
Dollars in thousands, except per share amounts	2023		2022		2023		2022
Weighted-average grant date fair value per share	$	—	$	—	$	—	$	—
Intrinsic value of options exercised	$	277	$	—	$	277	$	2,142
Fair value of stock options that vested	$	—	$	—	$	—	$	—

Award Grant Fair Value Assumptions

The following are the weighted-average assumptions for the PRSU grants during the periods indicated below:

	Six Months Ended June 30,
	2023			2022
Expected volatility		40.18	%		39.24	%
Expected dividends		2.24	%		—
Risk-free rate		5.21	%		1.05	%
Discount for post-vesting restrictions		8.48	%		11.93	%

Summary of PRSU Activity

The following table summarizes PRSU activity during the six months ended June 30, 2023:

Dollars and units in thousands, except per unit amounts	Units		Weighted-Average Grant Date Fair Value Per Unit
Non-vested units at January 1, 2023		70	$	52.07
Granted		118		32.40
Achieved performance adjustment		—		—
Vested		—		—
Forfeited		—		—
Non-vested units at June 30, 2023		188	$	39.72

Summary of Additional PRSU Information

The following table provides additional PRSU information for the periods indicated:

	Three Months Ended June 30,				Six Months Ended June 30,
Dollars in thousands, except per unit amounts	2023		2022		2023		2022
Weighted-average grant date fair value per unit	$	32.40	$	—	$	32.40	$	52.07
Fair value of PRSUs that vested	$	—	$	—	$	—	$	—

Summary of RSU Activity

The following table summarizes RSU activity during the six months ended June 30, 2023:

Dollars and units in thousands, except per unit amounts	Units			Weighted-Average Grant Date Fair Value Per Unit
Non-vested units at January 1, 2023		108		$	21.87
Granted (target)		—			—
Achieved performance adjustment		28			15.86
Vested		(91	)		15.86
Forfeited		—			—
Non-vested units at June 30, 2023		45		$	30.22

Summary of Additional RSU Information

The following table provides additional RSU information for the periods indicated:

	Three Months Ended June 30,				Six Months Ended June 30,
Dollars in thousands, except per unit amounts	2023		2022		2023		2022
Weighted-average grant date fair value per unit	$	—	$	—	$	—	$	—
Fair value of RSUs that vested	$	1,445	$	513	$	1,445	$	513

Summary of RSA Activity

The following table summarizes RSA activity during the six months ended June 30, 2023:

Dollars and shares in thousands, except per share amounts	Shares			Weighted-Average Grant Date Fair Value Per Share
Non-vested shares at January 1, 2023		198		$	38.99
Granted		233			34.50
Vested		(28	)		46.41
Forfeited		(2	)		53.04
Non-vested shares at June 30, 2023		401		$	35.83

Summary of Additional RSA Information

The following table provides additional RSA information for the periods indicated:

	Three Months Ended June 30,				Six Months Ended June 30,
Dollars in thousands, except per share amounts	2023		2022		2023		2022
Weighted-average grant date fair value per share	$	28.97	$	46.86	$	34.50	$	40.95
Fair value of RSAs that vested	$	1,127	$	939	$	1,281	$	1,156