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Consolidated Balance Sheets - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Current assets:    
Cash and cash equivalents $ 127,195 $ 184,996
Restricted cash and cash equivalents   365
Short-term investments   14,500
Accounts receivable, net 49,601 43,740
Inventories 24,457 24,844
Supplies, prepaid items and other:    
Prepaid insurance 10,563 13,752
Precious metals 12,918 12,838
Supplies 18,681 15,927
Prepaid and refundable income taxes 6,811 7,387
Other 4,701 4,965
Total supplies, prepaid items and other 53,674 54,869
Deferred income taxes 4,774 17,204
Current assets held for sale 72,996 78,364
Total current assets 332,697 418,882
Property, plant and equipment, net 978,709 588,124
Other assets:    
Noncurrent restricted cash and cash equivalents   45,969
Noncurrent restricted investments   25,000
Intangible and other, net 16,640 20,071
Total other assets 16,640 91,040
Noncurrent assets held for sale 33,781 32,526
Total assets 1,361,827 1,130,572
Current liabilities:    
Accounts payable 87,999 68,645
Short-term financing 9,119 11,955
Accrued and other liabilities 39,808 36,426
Current portion of long-term debt 22,468 10,680
Current liabilities held for sale 32,526 27,551
Total current liabilities 191,920 155,257
Long-term debt, net 497,954 440,205
Noncurrent accrued and other liabilities 8,786 6,649
Noncurrent liabilities held for sale 12,136 11,285
Deferred income taxes 52,179 83,128
Commitments and contingencies (Note 11)
Stockholders' equity:    
Common stock, $.10 par value; 75,000,000 shares authorized, 27,131,724 shares issued (26,968,212 shares at December 31, 2014) 2,713 2,697
Capital in excess of par value 192,249 170,537
Retained earnings 248,150 286,188
Stockholders equity including treasury stock 446,112 462,422
Less treasury stock, at cost:    
Common stock, 3,735,503 shares (4,320,462 shares at December 31, 2014) 24,532 28,374
Total stockholders' equity 421,580 434,048
Total Liabilities and Stockholders' equity 1,361,827 1,130,572
Series E Preferred Stock [Member]    
Redeemable preferred stocks:    
Redeemable preferred stock, value 177,272  
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