SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

Dec. 31, 2018

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES [Abstract]

Results from Discontinued Operations

in thousands	2018	2017	2016
Discontinued Operations
Pretax earnings (loss)	$        (2,748)	$       12,959	$        (4,877)
Income tax (expense) benefit	712	(5,165)	1,962
Earnings (loss) on discontinued operations,
net of tax	$        (2,036)	$         7,794	$        (2,915)

Depreciation, Depletion, Accretion and Amortization Expense

in thousands	2018	2017	2016
Depreciation, Depletion, Accretion and Amortization
Depreciation	$      276,814	$     250,835	$     238,237
Depletion	23,260	19,342	17,812
Accretion	10,776	11,415	11,059
Amortization of leaseholds	472	608	267
Amortization of intangibles	34,924	23,765	17,565
Total	$      346,246	$     305,965	$     284,940

Fair Value Measurement on Recurring Basis

	Level 1 Fair Value
in thousands	2018	2017
Fair Value Recurring
Rabbi Trust
Mutual funds	$       19,164	$     20,348
Total	$       19,164	$     20,348

	Level 2 Fair Value
in thousands	2018	2017
Fair Value Recurring
Rabbi Trust
Money market mutual fund	$        1,015	$       1,203
Total	$        1,015	$       1,203

Liabilities Under Self-Insurance Program

dollars in thousands	2018	2017
Self-insurance Program
Self-insured liabilities (undiscounted)	$        68,912	$       58,216
Insured liabilities (undiscounted)	4,377	7,892
Discount rate	2.93%	1.93%
Amounts Recognized in Consolidated
Balance Sheets
Other accounts and notes receivable	$             631	$         6,158
Investments and long-term receivables	3,932	7,246
Other current liabilities	(18,466)	(20,036)
Other noncurrent liabilities	(48,049)	(41,792)
Net liabilities (discounted)	$       (61,952)	$     (48,424)

Estimated Payments (Undiscounted) Under Self-Insurance Program

in thousands
Estimated Payments under Self-insurance Program
2019	$        20,529
2020	15,232
2021	11,615
2022	6,360
2023	3,665

Unrecognized Compensation Expense

	Unrecognized	Expected
	Compensation	Weighted-average
dollars in thousands	Expense	Recognition (Years)
Share-based Compensation
SOSARs 1	$          3,376	1.4
Performance shares	14,250	1.6
Restricted shares	6,098	1.7
Total/weighted-average	$        23,724	1.6

1 Stock-Only Stock Appreciation Rights (SOSARs)

Pretax Compensation Expense

in thousands	2018	2017	2016
Employee Share-based Compensation Awards
Pretax compensation expense	$        23,250	$       24,367	$       17,823
Income tax benefits	5,940	6,226	6,925

Weighted-Average Common Shares Outstanding Assuming Dilution

in thousands	2018	2017	2016
Weighted-average common shares outstanding	132,393	132,513	133,205
Dilutive effect of
SOSARs	963	1,295	1,339
Other stock compensation plans	570	1,070	1,246
Weighted-average common shares outstanding,
assuming dilution	133,926	134,878	135,790

Antidilutive Common Stock Equivalents

in thousands	2018	2017	2016
Antidilutive common stock equivalents	162	79	97