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CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Current assets:    
Cash and cash equivalents $ 42,746 $ 33,619
Accounts receivable, net 58,298 59,570
Inventories:    
Finished goods 16,447 20,415
Raw materials 1,488 1,441
Total inventories 17,935 21,856
Supplies, prepaid items and other:    
Prepaid insurance 1,657 10,535
Supplies 27,738 27,729
Other 9,643 10,431
Total supplies, prepaid items and other 39,038 48,695
Total current assets 158,017 163,740
Property, plant and equipment, net 980,625 1,014,038
Intangible and other assets, net 8,952 11,404
Total assets 1,147,594 1,189,182
Current liabilities:    
Accounts payable 55,647 55,992
Short-term financing 324 8,585
Accrued and other liabilities 53,796 35,573
Current portion of long-term debt 12,698 9,146
Total current liabilities 122,465 109,296
Long-term debt, net 402,975 400,253
Noncurrent accrued and other liabilities 11,247 11,691
Deferred income taxes 55,802 54,787
Commitments and contingencies (Note 7)
Stockholders' equity:    
Common stock, $.10 par value; 75,000,000 shares authorized, 31,280,685 shares issued 3,128 3,128
Capital in excess of par value 198,103 193,956
Retained earnings 174,403 256,214
Stockholders equity including treasury stock 378,634 456,298
Less treasury stock, at cost:    
Common stock, 2,662,244 shares (2,662,027 shares at December 31, 2017) 18,113 18,102
Total stockholders' equity 360,521 438,196
Total Liabilities and Stockholders' equity 1,147,594 1,189,182
Series E Preferred Stock [Member]    
Redeemable preferred stocks:    
Redeemable preferred stock, value 194,584 174,959
Series B Preferred Stock [Member]    
Stockholders' equity:    
Preferred stock, value 2,000 2,000
Series D Preferred Stock [Member]    
Stockholders' equity:    
Preferred stock, value $ 1,000 $ 1,000