UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 48,396	$ 44,061
Accounts receivable, net of allowance for doubtful accounts of $698 and $776, respectively	15,854	20,615
Income taxes receivable	5,079	29,755
Prepaid expenses and other	12,762	11,509
Current assets held for sale	22,432	22,622
Total current assets	104,523	128,562
Investments	13,118	12,971
Property, plant and equipment, net	739,587	687,553
Goodwill and intangible assets, net	81,392	81,515
Operating lease right-of-use assets	54,999	53,859
Deferred charges and other assets	13,021	13,259
Total assets	1,006,640	977,719
Current liabilities:
Current maturities of long-term debt, net of unamortized loan fees	1,302	648
Accounts payable	48,822	49,173
Advanced billings and customer deposits	12,391	12,425
Accrued compensation	6,857	9,616
Current operating lease liabilities	2,946	2,829
Accrued liabilities and other	16,103	17,906
Current liabilities held for sale	3,815	3,824
Total current liabilities	92,236	96,421
Long-term debt, less current maturities, net of unamortized loan fees	98,655	74,306
Other long-term liabilities:
Deferred income taxes	86,335	84,600
Asset retirement obligations	10,252	9,932
Benefit plan obligations	3,887	3,758
Non-current operating lease liabilities	51,629	50,477
Other liabilities	20,866	20,218
Total other long-term liabilities	172,969	168,985
Commitments and contingencies (Note 12)
Shareholders’ equity:
Common stock, no par value, authorized 96,000; 50,247 and 50,110 issued and outstanding at March 31, 2023 and December 31, 2022, respectively	0	0
Additional paid in capital	60,160	57,453
Retained earnings	582,620	580,554
Total shareholders’ equity	642,780	638,007
Total liabilities and shareholders’ equity	$ 1,006,640	$ 977,719