Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018
Current assets:
Cash and cash equivalents	$ 67,000	$ 53,948	$ 67,077
Receivables, net	968,279	722,945	787,344
Inventories	286,057	287,309	270,293
Prepayments and other current assets	140,053	119,500	88,760
Current assets held for sale	426	430	571
Total current assets	1,461,815	1,184,132	1,214,045
Investments	144,417	138,620	143,303
Property, plant and equipment	7,746,754	7,397,321	7,102,960
Less accumulated depreciation, depletion and amortization	2,944,928	2,818,644	2,796,649
Net property, plant and equipment	4,801,826	4,578,677	4,306,311
Deferred charges and other assets:
Goodwill	681,349	664,922	640,203
Other intangible assets, net	15,511	10,815	4,318
Operating lease right-of-use assets (Note 11)	118,764
Other	504,842	408,857	408,178
Noncurrent assets held for sale	2,087	2,087	1,835
Total deferred charges and other assets	1,322,553	1,086,681	1,054,534
Total assets	7,730,611	6,988,110	6,718,193
Current liabilities:
Short-term borrowings	139,988	0	0
Long-term debt due within one year	65,810	251,854	3,915
Accounts payable	378,370	358,505	339,713
Taxes payable	53,505	41,929	50,461
Dividends payable	40,460	39,695	38,714
Accrued compensation	93,642	69,007	62,836
Current operating lease liabilities (Note 11)	32,584
Other accrued liabilities	225,925	221,059	221,620
Current liabilities held for sale	3,393	4,001	7,959
Total current liabilities	1,033,677	986,050	725,218
Long-term debt	2,180,946	1,856,841	1,911,555
Deferred credits and other liabilities:
Deferred income taxes	487,194	430,085	405,761
Noncurrent operating lease liabilities (Note 11)	86,166
Other	1,147,022	1,148,359	1,154,366
Total deferred credits and other liabilities	1,720,382	1,578,444	1,560,127
Commitments and contingencies
Stockholders' equity:
Authorized - 500,000,000 shares, $1.00 par value Shares issued - 200,876,334 at September 30, 2019, 196,557,245 at September 30, 2018 and 196,564,907 at December 31, 2018	200,876	196,565	196,557
Other paid-in capital	1,351,990	1,248,576	1,247,151
Retained earnings	1,283,044	1,163,602	1,124,830
Accumulated other comprehensive loss	(36,678)	(38,342)	(43,619)
Treasury stock at cost - 538,921 shares	(3,626)	(3,626)	(3,626)
Total stockholders' equity	2,795,606	2,566,775	2,521,293
Total liabilities and stockholders' equity	$ 7,730,611	$ 6,988,110	$ 6,718,193