CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Assets
Cash and cash equivalents	$ 258,986	$ 284,060
Restricted cash	9,033	1,150
Accounts and notes receivable
Customers, less allowance for doubtful accounts 2016 — $2,813; 2015 — $5,576	398,488	397,287
Other	93,333	20,737
Inventories	345,616	347,073
Prepaid expenses	31,726	34,284
Total current assets	1,137,182	1,084,591
Investments and long-term receivables	39,226	40,558
Property, plant & equipment, net	3,261,438	3,156,290
Goodwill	3,094,824	3,094,824
Other intangible assets, net	769,052	766,579
Other noncurrent assets	169,753	158,790
Total assets	8,471,475	8,301,632
Liabilities
Current maturities of long-term debt	138	130
Trade payables and accruals	145,042	175,729
Accrued salaries, wages and management incentives	91,455	91,440
Accrued interest	9,751	9,752
Other current liabilities	125,858	76,428
Total current liabilities	372,244	353,479
Long-term debt	1,982,751	1,980,334
Deferred income taxes, net	702,854	681,096
Deferred management incentive and other compensation	19,698	15,980
Pension benefits	247,784	233,661
Other postretirement benefits	39,533	42,318
Asset retirement obligations	223,872	226,594
Deferred revenue	198,388	207,660
Other noncurrent liabilities	111,875	106,322
Total liabilities	3,898,999	3,847,444
Other commitments and contingencies (Note 12)
Equity
Common stock, $1 par value - Authorized 480,000 shares, Outstanding 132,339 and 133,172 shares, respectively	132,339	133,172
Capital in excess of par value	2,807,995	2,822,578
Retained earnings	1,771,518	1,618,507
Accumulated other comprehensive loss	(139,376)	(120,069)
Total equity	4,572,476	4,454,188
Total liabilities and equity	$ 8,471,475	$ 8,301,632