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Unaudited Condensed Consolidated Balance Sheets - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
ASSETS    
Cash and cash equivalents $ 93,726 $ 122,892
Trade accounts receivable, net 21,122 15,444
Accounts receivable from affiliates 6,377 6,411
Inventories 35,996 40,465
Refundable federal income taxes 14,638 8,928
Prepaid expenses and other 17,068 6,528
Total current assets 188,927 200,668
Property, plant and equipment, net 139,609 138,061
Intangibles, net 37,125 37,902
Investments in unconsolidated subsidiaries 27,384 24,611
Operating lease right-of-use assets 11,081 11,398
Other non-current assets 31,794 32,133
Total assets 435,920 444,773
LIABILITIES AND EQUITY    
Accounts payable 8,383 9,374
Accounts payable to affiliates 157 577
Revolving credit agreements 11,000 7,000
Current maturities of long-term debt 933 795
Asset retirement obligations 2,285 2,285
Accrued payroll 6,519 19,583
Deferred compensation 0 13,465
Deferred revenue 2,203 1,908
Other current liabilities 6,627 6,979
Total current liabilities 38,107 61,966
Long-term debt 22,649 17,148
Operating lease liabilities 12,117 12,448
Asset retirement obligations 34,633 34,574
Pension and other postretirement obligations 8,322 8,807
Deferred income taxes 18,573 12,338
Other long-term liabilities 7,682 8,100
Total liabilities 142,083 155,381
Common stock:    
Capital in excess of par value 8,318 8,911
Retained earnings 289,679 284,852
Accumulated other comprehensive loss (11,182) (11,337)
Total stockholders' equity 293,837 289,392
Total liabilities and equity 435,920 444,773
Class A Common Stock    
Common stock:    
Common stock 5,453 5,397
Class B Common Stock    
Common stock:    
Common stock $ 1,569 $ 1,569