Share-Based Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2020

Share-Based Compensation Plans [Abstract]

Stock Option Activity

Stock option activity was:

	Year Ended December 31,
	2020		2019		2018
	Shares	Weighted Average Exercise Price	Shares	Weighted Average Exercise Price	Shares	Weighted Average Exercise Price
January 1	866,000	$83.80	988,050	$80.37	1,593,422	$63.11
Exercised	—	—	(57,300)	$23.40	(500,122)	$24.43
Forfeited	(97,250)	$84.94	(64,750)	$84.94	(105,250)	$84.94
December 31	768,750	$83.65	866,000	$83.80	988,050	$80.37
Exercisable December 31	768,750	$83.65	60,000	$68.42	117,300	$46.43

Options Outstanding and Exercisable

At December 31, 2020, options outstanding and exercisable were:

			Options Outstanding			Options Exercisable
Exercise Price Range			Shares	Weighted Average Remaining Contractual Life	Weighted Average Exercise Price	Shares	Weighted Average Exercise Price
$66.00	to	$71.00	60,000	3.4 years	$68.42	60,000	$68.42
$84.00	to	$85.00	708,750	2.3 years	$84.94	708,750	$84.94
			768,750			768,750

Restricted Stock Activity

Restricted stock activity was:

	Year Ended December 31,
	2020	2019	2018
January 1	2,547,001	2,553,902	2,859,373
Granted	1,511,719	956,135	815,810
Vested	(874,431)	(798,468)	(944,048)
Forfeited	(171,301)	(164,568)	(177,233)
December 31	3,012,988	2,547,001	2,553,902
Weighted average grant date fair value of shares granted in the period	$51.26	$72.13	$67.62
Weighted average grant date fair value at December 31	$61.44	$70.89	$69.77

Performance Restricted Stock Units Activity

PRSU activity was:

	Year Ended December 31,
	2020			2019			2018
	Shares	Weighted Average Grant Date Fair Value		Shares	Weighted Average Grant Date Fair Value		Shares	Weighted Average Grant Date Fair Value
January 1	538,134	$	77.99	509,844	$	80.41	488,887	$	82.01
Granted	186,197	61.36		181,782	75.64		182,582	73.72
Distributed	(173,770)	84.94		(153,492)	83.23		(161,625)	77.68
December 31	550,561	$	70.17	538,134	$	77.99	509,844	$	80.41