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Share-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2021

Share-Based Compensation

Schedule of stock option activity

Activity in our stock option plans for 2004, 2012, 2019 and 2020 as well as stock options and warrants assumed from the CSFL merger is summarized in the following table. All information has been retroactively adjusted for stock dividends and stock splits.

​	​	​	​	​	​	​	​	​	​	​	​
​	​	​	​	​		​	Weighted	​	​		​
​	​	​	​	Weighted		​	Average	​	Aggregate		​
​	​	​	​	Average		​	Remaining	​	Intrinsic		​
​		Shares		Price			(Yrs.)		(000's)
Outstanding at January 1, 2021	​	256,425	​	$	59.01	​	​	​	​	​	​
Exercised	​	(37,854)	​		46.81	​	​	​		​	​
Outstanding at March 31, 2021	​	218,571	​		61.13	​	4.52	​	$	4,584	​
Exercisable at March 31, 2021	​	218,571	​	​	61.13	​	4.52	​	$	4,584	​

Summary of nonvested restricted stock

Nonvested restricted stock for 2021 is summarized in the following table. All information has been retroactively adjusted for stock dividends and stock splits.

​

​	​	​	​	​	​	​
​		​		Weighted-
​	​	​	​	Average
​	​	​	​	Grant-Date
Restricted Stock	​	Shares	​	Fair Value
Nonvested at January 1, 2021		11,004	​	$	59.42	​
Vested		(2,082)	​		52.95	​
Nonvested at March 31, 2021		8,922	​	$	60.94	​

Summary of nonvested RSUs

Outstanding RSUs for the three months ended March 31, 2021 is summarized in the following table.

​

​	​	​	​	​	​	​
​		​		Weighted-
​	​	​	​	Average
​	​	​	​	Grant-Date
Restricted Stock Units	​	Shares	​	Fair Value
Outstanding at January 1, 2021		750,821	​	$	60.88	​
Granted		281,116	​		81.04	​
Vested	​	(59,518)	​	​	61.19	​
Forfeited	​	(2,496)	​	​	56.34	​
Outstanding at March 31, 2021		969,923	​	$	66.82	​

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Tabular disclosure of the changes in outstanding nonvested shares.

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