Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2025

Share-Based Payment Arrangement [Abstract]

Summary of Activity Under RSU Plan

The following table is a summary of the activity under the Company's RSU plan.

				Wgtd. Avg.
	Restricted			Grant Date
	Stock Units			Fair Value
Six Months Ended June 30, 2025
Nonvested at December 31, 2024		42,825		$	90.35
Granted		10,000			122.47
Vested		(525	)		93.66
Nonvested at June 30, 2025		52,300			96.46

Summary of Accumulated Stock Units

A summary of the accumulated stock units under the Deferred Stock Compensation Plan is as follows:

	June 30, 2025		December 31, 2024
Accumulated stock units		118,710		120,984
Average price	$	48.04	$	44.70

Summary of Activity Under Stock Option Plan

The following table is a summary of the activity under both the Employee Plan and the Non-Employee Directors’ Plan:

						Wgtd. Avg.
				Wgtd. Avg.		Remaining	Aggregate
				Exercise		Contractual	Intrinsic
	Options			Price		Term	Value
	(Dollars in thousands, except option data)
Six Months Ended June 30, 2025
Outstanding at December 31, 2024		947,921		$	58.42
Options exercised		(48,625	)		36.78
Options canceled, forfeited, or expired		(5,000	)		90.56
Outstanding at June 30, 2025		894,296			59.42	9.45 Yrs.	$	57,417
Exercisable at June 30, 2025		378,296			45.03	7.25 Yrs.	$	29,730

Options Exercised Under Stock Option Plan

The following table has additional information regarding options exercised under both the Employee Plan and the Non-Employee Directors’ Plan:

	Three Months Ended June 30,				Six Months Ended June 30,
	2025		2024		2025		2024
	(Dollars in thousands)
Total intrinsic value of options exercised	$	2,446	$	3,254	$	4,180	$	5,085
Cash received from options exercised		1,015		1,714		1,788		2,422
Tax benefit realized from options exercised		588		782		1,005		1,222

Stock-based Employee Compensation Expense

The components of stock-based compensation expense for all share-based compensation plans and related tax benefits are as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
	2025		2024		2025		2024
	(Dollars in thousands)
Stock-based compensation expense	$	919	$	920	$	1,709	$	1,635
Tax benefit		221		221		411		393
Stock-based compensation expense, net of tax	$	698	$	699	$	1,298	$	1,242

Unearned Stock-based Compensation Expense

	June 30, 2025
	(Dollars in thousands)
Unearned stock-based compensation expense for unvested stock options	$	6,247
Unearned stock-based compensation expense for unvested RSU's		4,056