SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

Dec. 31, 2016

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES [Abstract]

Depreciation, Depletion, Accretion and Amortization Expense

in thousands	2016	2015	2014
Depreciation, Depletion, Accretion and Amortization
Depreciation	$      238,237	$     228,866	$     239,611
Depletion	17,812	18,177	16,741
Accretion	11,059	11,474	11,601
Amortization of leaseholds	267	688	578
Amortization of intangibles	17,565	15,618	10,966
Total	$      284,940	$     274,823	$     279,497

Fair Value Measurement on Recurring Basis

	Level 1 Fair Value
in thousands	2016	2015
Fair Value Recurring
Rabbi Trust
Mutual funds	$        6,883	$     11,472
Equities	10,033	8,992
Total	$      16,916	$     20,464

	Level 2 Fair Value
in thousands	2016	2015
Fair Value Recurring
Rabbi Trust
Money market mutual fund	$        1,705	$       2,124
Total	$        1,705	$       2,124

Fair Value Measurement on Nonrecurring Basis

	Year ending December 31, 2016		Year ending December 31, 2015
		Impairment		Impairment
in thousands	Level 2	Charges	Level 2	Charges
Fair Value Nonrecurring
Property, plant & equipment	$              0	$       1,359	$              0	$       2,176
Other intangible assets, net	0	8,180	0	2,858
Other assets	0	967	0	156
Totals	$              0	$     10,506	$              0	$       5,190

Reconciliation of Deferred Revenue Balances

in thousands	2016	2015	2014
Deferred Revenue
Balance at beginning of year	$      214,060	$     219,968	$     224,743
Cash received and revenue deferred	0	0	187
Amortization of deferred revenue	(7,592)	(5,908)	(4,962)
Balance at end of year	$      206,468	$     214,060	$     219,968

Unrecognized Compensation Expense

	Unrecognized	Expected
	Compensation	Weighted-average
dollars in thousands	Expense	Recognition (Years)
Share-based Compensation
SOSARs 1	$          4,899	1.8
Performance shares	20,965	2.4
Restricted shares	4,925	2.6
Total/weighted-average	$        30,789	2.3

1 Stock-Only Stock Appreciation Rights (SOSARs)

Pretax Compensation Expense

in thousands	2016	2015	2014
Employee Share-based Compensation Awards
Pretax compensation expense	$        17,823	$       16,362	$       22,217
Income tax benefits	6,925	6,347	8,571

Liabilities Under Self-Insurance Program

dollars in thousands	2016	2015
Self-insurance Program
Self-insured liabilities (undiscounted)	$        49,310	$       44,618
Insured liabilities (undiscounted)	72,644	16,787
Discount rate	1.40%	1.44%
Amounts Recognized in Consolidated
Balance Sheets
Other accounts and notes receivable	$        67,631	$                0
Investments and long-term receivables	16,133	15,810
Other current liabilities	(69,549)	(14,198)
Other noncurrent liabilities	(49,074)	(44,102)
Net liabilities (discounted)	$       (34,859)	$     (42,490)

Estimated Payments (Undiscounted) Under Self-Insurance Program

in thousands
Estimated Payments under Self-insurance Program
2017	$        74,027
2018	13,599
2019	8,767
2020	5,461
2021	3,716

Weighted-Average Common Shares Outstanding Assuming Dilution

in thousands	2016	2015	2014
Weighted-average common shares outstanding	133,205	133,210	131,461
Dilutive effect of
Stock options/SOSARs	1,339	1,027	656
Other stock compensation plans	1,246	856	874
Weighted-average common shares outstanding,
assuming dilution	135,790	135,093	132,991

Antidilutive Common Stock Equivalents

in thousands	2016	2015	2014
Antidilutive common stock equivalents	97	544	2,352