Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2022

Share-Based Payment Arrangement [Abstract]

Summary of Company's Option Activity

A summary of the Company’s option activity and related information for the three years ended December 31, 2022 is as follows:

	Number of options			Weighted- average price		Weighted- average remaining contractual term (in years)		Aggregate intrinsic value (in millions)
Balance at December 31, 2019		580,140		$	29.57
Options granted		—			—
Options exercised		(163,670	)		30.22
Options cancelled/forfeited/expired		(7,060	)		28.95
Balance at December 31, 2020		409,410			29.33
Options granted		—			—
Options exercised		(133,020	)		28.57
Options cancelled/forfeited/expired		(1,760	)		34.57
Balance at December 31, 2021		274,630			29.66
Options granted		—			—
Options exercised		(135,280	)		25.61
Options cancelled/forfeited/expired		—			—
Balance at December 31, 2022		139,350		$	33.59		1.04	$	9.1
Exercisable at December 31, 2022		139,350		$	33.59		1.04	$	9.1
Expected to vest after December 31, 2022		139,350		$	33.59		1.04	$	9.1

Options Outstanding and Options Exercisable by Exercise Price with Weighted-Average Remaining Contractual Life for Options Outstanding and Weighted-Average Exercise Price

The following table indicates the options outstanding and options exercisable by exercise price with the weighted-average remaining contractual life for the options outstanding and the weighted-average exercise price at December 31, 2022:

	Options Outstanding						Options Exercisable
Exercise price	Number outstanding at December 31, 2022		Weighted-average remaining contractual life (Years)		Weighted-average grant date value		Number exercisable at December 31, 2022		Weighted-average grant date value
$20 – 25		16,850		0.17	$	24.60		16,850	$	24.60
$25 – 30		—		—	$	—		—	$	—
$30 – 35		115,020		1.16	$	34.54		115,020	$	34.54
$35 – 40		6,800		1.00	$	39.19		6,800	$	39.19
$40 – 45		680		1.67	$	40.37		680	$	40.37
$20 – 45		139,350		1.04	$	33.59		139,350	$	33.59

Summary of Company's Restricted Stock Units Activity

The following table summarizes the activity of the Company’s RSUs, which includes service-based and performance-based awards, for the three years ended December 31, 2022:

				Weighted-		Aggregate
				average		intrinsic
	Number			grant date		value
	of shares			fair value		(in millions)
Balance at December 31, 2019		196,248		$	50.68
RSUs granted		126,540			50.99
RSUs vested		(89,225	)		43.42
RSUs cancelled/forfeited/expired		(7,593	)		57.93
Balance at December 31, 2020		225,970			57.06
RSUs granted		116,326			72.75
RSUs vested		(116,242	)		53.32
RSUs cancelled/forfeited/expired		(8,646	)		52.78
Balance at December 31, 2021		217,408			67.63
RSUs granted		95,028			77.79
RSUs vested		(114,274	)		58.30
RSUs cancelled/forfeited/expired		(10,754	)		70.10
Balance at December 31, 2022		187,408		$	76.74	$	18.4