Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Current Assets:
Cash and cash equivalents	$ 37,357	$ 44,892
Accounts receivable, net	550,607	523,276
Inventories, net	646,176	663,035
Other current assets	135,971	134,613
Total Current Assets	1,370,111	1,365,816
Property, plant and equipment	8,339,050	8,294,962
Allowances for depreciation, depletion and amortization	(3,192,368)	(3,137,733)
Net property, plant and equipment	5,146,682	5,157,229
Goodwill	2,397,483	2,399,118
Other intangibles, net	498,195	501,282
Operating lease right-of-use assets	498,233
Other noncurrent assets	137,703	127,974
Total Assets	10,048,407	9,551,419
Current Liabilities:
Accounts payable	184,844	210,808
Accrued salaries, benefits and payroll taxes	27,313	51,434
Pension and postretirement benefits	9,923	9,942
Accrued insurance and other taxes	52,895	63,543
Current maturities of long-term debt and short-term facilities	360,056	390,042
Accrued interest	31,844	17,176
Operating lease liabilities	50,776
Other current liabilities	39,986	43,805
Total Current Liabilities	757,637	786,750
Long-term debt	2,801,228	2,730,439
Pension, postretirement and postemployment benefits	138,049	134,469
Deferred income taxes, net	695,771	705,564
Noncurrent operating lease liabilities	446,128
Other noncurrent liabilities	234,098	244,785
Total Liabilities	5,072,911	4,602,007
Equity:
Common stock, par value $0.01 per share	625	624
Preferred stock, par value $0.01 per share
Additional paid-in capital	3,406,456	3,396,059
Accumulated other comprehensive loss	(140,324)	(143,579)
Retained earnings	1,705,717	1,693,259
Total Shareholders' Equity	4,972,474	4,946,363
Noncontrolling interests	3,022	3,049
Total Equity	4,975,496	4,949,412
Total Liabilities and Equity	$ 10,048,407	$ 9,551,419