Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Current assets
Cash and cash equivalents	$ 101,600	$ 69,308
Accounts receivable, net of allowances of $1,523 in 2017 and 2016	17,468	13,389
Accounts receivable from affiliates	19,919	7,404
Inventories, net	30,015	28,927
Assets held for sale	0	2,016
Prepaid expenses and other	7,986	8,273
Current assets of discontinued operations	0	252,415
Total current assets	176,988	381,732
Property, plant and equipment, net	120,068	115,106
Intangibles, net	43,554	45,678
Deferred income taxes	5,962	10,876
Investment in unconsolidated subsidiaries	16,335	31,054
Deferred costs	3,582	2,069
Other non-current assets	23,063	23,089
Long-term assets of discontinued operations	0	58,417
Total assets	389,552	668,021
Current liabilities
Accounts payable	7,575	6,995
Accounts payable to affiliates	1,925	3,565
Revolving credit agreements	15,000	0
Asset retirement obligations	3,092	3,843
Current maturities of long-term debt	1,125	1,744
Accrued payroll	17,204	15,482
Other current liabilities	8,055	9,954
Current liabilities of discontinued operations	0	180,245
Total current liabilities	53,976	221,828
Long-term debt	42,021	94,295
Asset retirement obligations	37,005	38,262
Pension and other postretirement obligations	11,827	14,271
Deferred compensation	12,939	13,578
Other long-term liabilities	12,336	9,737
Long-term liabilities of discontinued operations	0	55,757
Total liabilities	170,104	447,728
Common stock:
Capital in excess of par value	4,447	0
Retained earnings	216,490	239,441
Accumulated other comprehensive loss	(8,341)	(25,927)
Total stockholders’ equity	219,448	220,293
Total liabilities and equity	389,552	668,021
Class A Common Stock
Common stock:
Common stock	5,282	5,208
Class B Common Stock
Common stock:
Common stock	$ 1,570	$ 1,571