Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2023

Share-Based Payment Arrangement [Abstract]

Summary of Stock Option Activity

A summary of stock option activity is as follows:

Options	Number of Shares	Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (Years)	Aggregate Intrinsic Value as of December 31, 2022
Outstanding at December 31, 2020	71,594	$	74.54
Exercised	(62,322)	73.36
Outstanding at December 31, 2021	9,272	$	82.47
Exercised	—	—
Outstanding at December 31, 2022	9,272	82.47
Exercised	—	—
Outstanding at December 31, 2023	9,272	$	82.47	1.98	$1,338
Vested	9,272	$	82.47	1.98	$1,338
Ending Exercisable	9,272	$	82.47	1.98	$1,338

Schedule of Stock Options Outstanding and Exercisable

A summary of stock options outstanding and exercisable as of December 31, 2023, is as follows:

	Options Outstanding				Options Exercisable
Exercise Price	Shares	Weighted Average Remaining Contractual Life	Weighted Average Exercise Price		Shares	Weighted Average Exercise Price
$65.36 - $65.36	1,582	1.15	$	65.36	1,582	$	65.36
$85.99 - $85.99	7,690	2.15	85.99		7,690	85.99

Summary of Company's Employee and Director Share Grant Activity

A summary of the Company’s employee and director share grant activity is as follows:

Restricted Stock Grants	Shares	Weighted-Average Grant-Date Fair Value
Unreleased at December 31, 2020	209,032	$	95.86
Granted	99,802	132.75
Released	(96,248)	91.65
Cancelled	(12,808)	113.89
Unreleased at December 31, 2021	199,778	$	115.16
Granted	105,677	201.12
Released	(86,781)	112.31
Cancelled	(10,614)	147.03
Unreleased at December 31, 2022	208,060	$	158.38
Granted	98,263	158.04
Released	(90,662)	147.21
Cancelled	(10,084)	165.36
Unreleased at December 31, 2023	205,577	$	162.81

Schedule of Nonvested Performance-based Units Activity

A summary of the PSU activity is as follows:

Performance-Based Stock Units	Units	Weighted-Average Grant-Date Fair Value
Unvested at December 31, 2020	123,311	$	104.25
Granted	40,832	138.04
Released	(28,735)	$	117.19
Unvested at December 31, 2021	135,408	$	111.69
Granted	61,085	223.96
Released	(49,334)	$	194.21
Unvested at December 31, 2022	147,159	$	130.63
Granted	86,795	207.28
Released	(45,242)	$	162.18
Unvested at December 31, 2023	188,712	$	158.32

Schedule of Weighted Average Assumptions Used to Estimate Fair Value of Awards

A Monte Carlo simulation model was used to calculate the fair value of the TSR Target portion of the PSUs, using the following assumptions:

	For the Year Ended December 31,
	2023	2022	2021
Intrinsic value	$30,256	$21,659	$30,701
Risk-free rate	4.6%	1.8%	0.22%
Volatility	29.3%	29.3%	28.5%
Expected term (in years)	2.8	2.9	2.9
Dividend yield	—%	—%	—%
Unrecognized compensation cost	$18,798	$13,241	$8,859
Term over which compensation cost recognized (in years)	3	3	3