STOCK-BASED COMPENSATION (Tables)

3 Months Ended

Mar. 31, 2020

STOCK-BASED COMPENSATION

Summary of stock option activity

				Weighted
		Weighted		Average
		Average		Remaining	Aggregate
	Number of	Exercise		Contractual	Intrinsic Value
	Shares	Price		Term (years)	(in millions)
Outstanding and exercisable, December 31, 2019	10,834	$	18.59
Exercised	1,510		21.15
Outstanding and exercisable, March 31, 2020	9,324	$	18.17	0.2	$	0.7

Summary of restricted stock activity

		Weighted
	Number of	Average Grant
	Shares	Date Fair Value
Nonvested stock at December 31, 2019	436,013	$	92.47
Granted	164,925		119.65
Vested	(246,850)		86.92
Forfeited	(10,674)		104.90
Nonvested stock at March 31, 2020	343,414	$	109.12

Summary of performance-based restricted stock unit

		Weighted
	Number of	Average Grant
	Shares	Date Fair Value
Nonvested stock at December 31, 2019	132,248	$	105.75
Granted	72,975		125.62
Vested	(48,053)		108.91
Forfeited	(34,504)		109.85
Nonvested stock at March 31, 2020	122,666	$	115.18