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CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Current assets    
Cash and cash equivalents $ 122,892 $ 85,257
Trade accounts receivable, net of allowances of $0 and $1,523 in 2019 and 2018, respectively 15,444 20,817
Accounts receivable from affiliates 6,411 7,999
Inventories 40,465 31,209
Assets held for sale 0 4,330
Prepaid expenses and other 15,456 14,562
Total current assets 200,668 164,174
Property, plant and equipment, net 138,061  
Property, plant and equipment, net   124,554
Intangibles, net 37,902 40,516
Investment in unconsolidated subsidiaries 24,611 20,091
Deferred costs 3,944 3,244
Operating lease right-of-use assets 11,398  
Other non-current assets 28,189 24,412
Total assets 444,773 376,991
Current liabilities    
Accounts payable 9,374 7,746
Accounts payable to affiliates 577 1,653
Revolving credit agreements 7,000 4,000
Current maturities of long-term debt 795 654
Asset retirement obligations 2,285 1,826
Accrued payroll 19,583 19,853
Deferred compensation 13,465  
Other current liabilities 8,887 6,516
Total current liabilities 61,966 42,248
Long-term debt 17,148 6,367
Operating lease liabilities 12,448  
Asset retirement obligations 34,574 35,877
Pension and other postretirement obligations 8,807 10,429
Deferred income taxes 12,338 2,846
Deferred compensation 0 12,939
Other long-term liabilities 8,100 15,581
Total liabilities 155,381 126,287
Common stock:    
Capital in excess of par value 8,911 7,042
Retained earnings 284,852 250,352
Accumulated other comprehensive loss (11,337) (13,611)
Total stockholders’ equity 289,392 250,704
Total liabilities and equity 444,773 376,991
Class A Common Stock    
Common stock:    
Common stock 5,397 5,352
Class B Common Stock    
Common stock:    
Common stock $ 1,569 $ 1,569