INCENTIVE PLANS (Tables)

12 Months Ended

Dec. 31, 2018

Aggregate Values for Distributed Restricted Share Awards

in thousands	2018	2017	2016
Aggregate value of distributed
restricted shares	$        1,345	$        7,685	$               0

Weighted-Average Fair Value and Weighted-Average Assumptions Used in Estimating Fair Value of Grants

	2018	2017	2016
SOSARs
Fair value	$        43.72	$        43.01	$        29.20
Risk-free interest rate	2.90%	2.36%	1.66%
Dividend yield	1.39%	1.27%	1.39%
Volatility	31.49%	31.35%	30.42%
Expected term	9.00 years	9.00 years	9.00 years

Aggregate Intrinsic Values of Options Exercised

in thousands	2018	2017	2016
Aggregate intrinsic value of SOSARs exercised	$       49,248	$       13,758	$       27,705

Cash and Stock Consideration Received and Tax Benefit Realized from SOSAR Exercises and Compensation Cost Recorded

in thousands	2018	2017	2016
SOSARs
Cash and stock consideration received
from exercises	$              0	$              0	$              0
Tax benefit from exercises	19,083	5,331	10,767
Compensation cost	4,763	3,723	2,744

Performance Shares [Member]

Summary of Activity For Nonvested Performance Share Units

	Target	Weighted-average
	Number	Grant Date
	of Shares	Fair Value
Performance Shares
Nonvested at January 1, 2018	498,979	$             89.16
Granted	130,715	117.20
Vested	(218,725)	74.85
Canceled/forfeited	(60,291)	103.56
Nonvested at December 31, 2018	350,678	$           106.06

Aggregate Value of Performance Shares

in thousands	2018	2017	2016
Aggregate value of distributed
performance shares	$       53,721	$       52,368	$       60,443

Restricted Shares [Member]

Summary of Restricted Stock Units

		Weighted-average
	Number	Grant Date
	of Shares	Fair Value
Restricted Stock Units
Nonvested at January 1, 2018	109,302	$             97.43
Granted	52,065	117.20
Vested	(11,622)	100.35
Canceled/forfeited	(4,366)	110.73
Nonvested at December 31, 2018	145,379	$           103.88

SOSARs [Member]

Summary of Our SOSAR Activity

			Weighted-average
			Remaining	Aggregate
	Number	Weighted-average	Contractual	Intrinsic Value
	of Shares	Exercise Price	Life (Years)	(in thousands)
SOSARs
Outstanding at January 1, 2018	2,242,487	$             52.95
Granted	82,800	121.69
Exercised	(583,539)	45.71
Forfeited or expired	(165)	79.41
Outstanding at December 31, 2018	1,741,583	$             58.64	3.70	$           72,276
Exercisable at December 31, 2018	1,518,900	$             51.39	3.08	$           71,284