Stock-Based Compensation Plans (Tables)

6 Months Ended

Jun. 30, 2023

Share-Based Payment Arrangement, Noncash Expense [Abstract]

A summary of the Plans’ stock option activity for the six months ended June 30, 2023 and June 30, 2022 is presented below:


Stock Options	Common Shares	Weighted Average Strike Price		Remaining Contractual Term (1)	Intrinsic Value (2) (in thousands)
Outstanding at January 1, 2023	68,093	$	41.14
Granted	—	—
Exercised	(54,218)	40.87
Forfeited or canceled	—	—
Outstanding at June 30, 2023	13,875	$	42.18	4.5	$	422
Exercisable at June 30, 2023	13,875	$	42.18	4.5	$	422


Stock Options	Common Shares	Weighted Average Strike Price		Remaining Contractual Term (1)	Intrinsic Value (2) (in thousands)
Outstanding at January 1, 2022	193,447	$	41.62

Granted	—	—
Exercised	(83,507)	42.39
Forfeited or canceled	(1,430)	40.87
Outstanding at June 30, 2022	108,510	$	41.04	1.2	$	4,244
Exercisable at June 30, 2022	108,510	$	41.04	1.2	$	4,244

(1)Represents the remaining weighted average contractual life in years.

(2)Aggregate intrinsic value represents the total pre-tax intrinsic value (i.e., the difference between the Company’s stock price on the last trading day of the quarter and the option exercise price, multiplied by the number of shares) that would have been received by the option holders if they had exercised their options on the last day of the quarter. Options with exercise prices above the stock price on the last trading day of the quarter are excluded from the calculation of intrinsic value. The intrinsic value will change based on the fair market value of the Company’s stock.

Summary of Plans' Restricted and Performance Share Award Activity

A summary of the Plans’ restricted share activity for the six months ended June 30, 2023 and June 30, 2022 is presented below:


	Six months ended June 30, 2023			Six months ended June 30, 2022
Restricted Shares	Common Shares	Weighted Average Grant-Date Fair Value		Common Shares	Weighted Average Grant-Date Fair Value
Outstanding at January 1	610,155	$	73.21	476,813	$	61.33
Granted	260,173	88.29		204,043	96.95
Vested and issued	(103,161)	64.08		(56,380)	64.44
Forfeited or canceled	(7,638)	82.82		(9,722)	72.87
Outstanding at June 30	759,529	$	79.52	614,754	$	72.68
Vested, but deferred, at June 30	98,247	$	53.35	96,400	$	52.83

A summary of the Plans’ performance-based stock award activity, based on the target level of the awards, for the six months ended June 30, 2023 and June 30, 2022 is presented below:


	Six months ended June 30, 2023			Six months ended June 30, 2022
Performance-based Stock	Common Shares	Weighted Average Grant-Date Fair Value		Common Shares	Weighted Average Grant-Date Fair Value
Outstanding at January 1	545,379	$	70.30	557,255	$	62.94
Granted	186,313	92.45		160,326	97.16
Added by performance factor at vesting	23,161	63.64		—	—
Vested and issued	(178,203)	63.64		—	—
Forfeited or canceled	(7,909)	82.73		(163,803)	71.44
Outstanding at June 30	568,741	$	79.20	553,778	$	70.34
Vested, but deferred, at June 30	36,438	$	44.99	35,424	$	44.04