SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

Dec. 31, 2020

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES [Abstract]

Results from Discontinued Operations

in thousands	2020	2019	2018
Discontinued Operations
Pretax loss	$        (4,752)	$       (6,541)	$       (2,748)
Income tax benefit	1,237	1,700	712
Loss on discontinued operations,
net of tax	$        (3,515)	$       (4,841)	$       (2,036)

Depreciation, Depletion, Accretion and Amortization Expense

in thousands	2020	2019	2018
Depreciation, Depletion, Accretion and Amortization
Depreciation	$      315,136	$     300,613	$     276,814
Depletion	21,011	22,421	23,260
Accretion	12,432	10,992	10,776
Amortization of finance leases	1,616	29	472
Amortization of intangibles	46,611	40,541	34,924
Total	$      396,806	$     374,596	$     346,246

Fair Value Measurement on Recurring Basis

	Level 1 Fair Value
in thousands	2020	2019
Fair Value Recurring
Rabbi Trust
Mutual funds	$       28,058	$     22,883
Total	$       28,058	$     22,883

	Level 2 Fair Value
in thousands	2020	2019
Fair Value Recurring
Rabbi Trust
Money market mutual fund	$           837	$       1,340
Total	$           837	$       1,340

Liabilities Under Self-Insurance Program

dollars in thousands	2020	2019
Self-insurance Program
Self-insured liabilities (undiscounted)	$        75,570	$       69,069
Insured liabilities (undiscounted)	3,661	6,431
Discount rate	0.30%	1.63%
Amounts Recognized in Consolidated
Balance Sheets
Other accounts and notes receivable	$             595	$                0
Investments and long-term receivables	3,585	5,931
Other current liabilities	(20,707)	(19,830)
Other noncurrent liabilities	(57,608)	(51,360)
Net liabilities (discounted)	$       (74,135)	$     (65,259)

Estimated Payments (Undiscounted) Under Self-Insurance Program

in thousands
Estimated Payments under Self-insurance Program
2021	$        22,436
2022	16,453
2023	11,492
2024	6,857
2025	3,751

Unrecognized Compensation Expense

	Unrecognized	Expected
	Compensation	Weighted-average
dollars in thousands	Expense	Recognition (Years)
Share-based Compensation
SOSARs 1	$          1,605	1.3
Performance shares	10,622	1.7
Restricted shares	8,362	1.7
Total/weighted-average	$        20,589	1.7

¹ Stock-Only Stock Appreciation Rights (SOSARs)

Pretax Compensation Expense

in thousands	2020	2019	2018
Employee Share-based Compensation Awards
Pretax compensation expense	$        31,419	$       30,067	$       23,250
Income tax benefits	4,954	7,682	5,940

Weighted-Average Common Shares Outstanding Assuming Dilution

in thousands	2020	2019	2018
Weighted-average common shares outstanding	132,578	132,300	132,393
Dilutive effect of
SOSARs	307	611	963
Other stock compensation plans	360	474	570
Weighted-average common shares outstanding,
assuming dilution	133,245	133,385	133,926

Antidilutive Common Stock Equivalents

in thousands	2020	2019	2018
Antidilutive common stock equivalents	101	105	162