CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Assets
Cash and cash equivalents	$ 40,037	$ 141,646
Restricted cash	4,367	5,000
Accounts and notes receivable
Customers, less allowance for doubtful accounts 2018 — $2,090; 2017 — $2,649	512,279	434,089
Other	28,499	154,248
Inventories	429,330	384,338
Other current assets	64,633	60,780
Total current assets	1,079,145	1,180,101
Investments and long-term receivables	44,615	35,115
Property, plant & equipment, net	4,237,307	3,918,931
Goodwill	3,165,396	3,122,321
Other intangible assets, net	1,095,378	1,063,630
Other noncurrent assets	210,289	184,793
Total assets	9,832,130	9,504,891
Liabilities
Current maturities of long-term debt	23	41,383
Short-term debt	133,000	0
Trade payables and accruals	216,473	197,335
Accrued salaries, wages and management incentives	91,960	87,208
Accrued interest	19,631	11,664
Other current liabilities	141,463	105,282
Total current liabilities	602,550	442,872
Long-term debt	2,779,357	2,813,482
Deferred income taxes, net	567,283	464,081
Deferred management incentive and other compensation	16,604	19,856
Pension benefits	119,587	245,449
Other postretirement benefits	35,274	37,856
Asset retirement obligations	225,726	218,117
Deferred revenue	186,397	191,476
Other noncurrent liabilities	96,449	102,809
Total liabilities	4,629,227	4,535,998
Other commitments and contingencies (Note 12)
Equity
Common stock, $1 par value, Authorized 480,000 shares, Outstanding 131,762, and 132,324 shares, respectively	131,762	132,324
Capital in excess of par value	2,798,486	2,805,587
Retained earnings	2,444,870	2,180,448
Accumulated other comprehensive loss	(172,215)	(149,466)
Total equity	5,202,903	4,968,893
Total liabilities and equity	$ 9,832,130	$ 9,504,891