CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Operating Activities
Net earnings	$ 270,174	$ 260,857
Adjustments to reconcile net earnings to net cash provided by operating activities
Depreciation, depletion, accretion and amortization	194,951	182,677
Noncash operating lease expense	17,977	17,549
Net gain on sale of property, plant & equipment and businesses	(741)	(10,748)
Contributions to pension plans	(4,409)	(4,638)
Share-based compensation expense	15,220	14,370
Deferred tax expense (benefit)	36,644	34,816
Changes in assets and liabilities before initial effects of business acquisitions and dispositions	(101,271)	(201,256)
Other, net	(2,954)	8,289
Net cash provided by operating activities	425,591	301,916
Investing Activities
Purchases of property, plant & equipment	(223,147)	(225,837)
Proceeds from sale of property, plant & equipment	3,063	11,200
Proceeds from sale of businesses	651	1,744
Payment for businesses acquired, net of acquired cash	(5,668)	1,122
Other, net	5,575	(4,577)
Net cash used for investing activities	(219,526)	(216,348)
Financing Activities
Proceeds from short-term debt	0	360,100
Payment of short-term debt	0	(356,100)
Payment of current maturities and long-term debt	(250,012)	(11)
Proceeds from issuance of long-term debt	750,000	0
Debt issuance and exchange costs	(10,762)	0
Settlements of interest rate derivatives	(19,863)	0
Purchases of common stock	(26,132)	0
Dividends paid	(90,128)	(81,927)
Share-based compensation, shares withheld for taxes	(15,830)	(25,508)
Other, net	(645)	(4)
Net cash provided by (used for) financing activities	336,628	(103,450)
Net increase (decrease) in cash and cash equivalents and restricted cash	542,693	(17,882)
Cash and cash equivalents and restricted cash at beginning of year	274,506	44,404
Cash and cash equivalents and restricted cash at end of period	$ 817,199	$ 26,522