UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 229,182	$ 195,397
Accounts receivable, net of allowance for doubtful accounts of $490 and $614, respectively	66,618	70,393
Prepaid expenses and other	12,943	9,631
Current assets held for sale	1,117,528	1,133,294
Total current assets	1,426,271	1,408,715
Investments	13,376	13,769
Property, plant and equipment, net	468,383	440,427
Goodwill and Intangible assets, net	106,543	106,759
Operating lease right-of-use assets	52,738	50,387
Deferred charges and other assets	14,998	11,650
Total assets	2,082,309	2,031,707
Current liabilities:
Current maturities of long-term debt, net of unamortized loan fees	680,531	688,463
Accounts payable	19,866	19,599
Advanced billings and customer deposits	9,407	8,594
Accrued compensation	11,235	16,413
Income taxes payable	21,622	6,951
Current operating lease liabilities	2,062	1,970
Accrued liabilities and other	14,505	13,869
Current liabilities held for sale	443,089	452,202
Total current liabilities	1,202,317	1,208,061
Other long-term liabilities:
Deferred income taxes	155,623	150,652
Asset retirement obligations	5,130	4,955
Benefit plan obligations	12,785	14,645
Non-current operating lease liabilities	48,047	46,095
Other liabilities	24,453	24,905
Total other long-term liabilities	246,038	241,252
Commitments and contingencies
Shareholders’ equity:
Common stock, no par value, authorized 96,000; 49,943 and 49,868 issued and outstanding at March 31, 2021 and December 31, 2020, respectively	0	0
Additional paid in capital	46,583	47,317
Retained earnings	591,304	539,783
Accumulated other comprehensive loss, net of taxes	(3,933)	(4,706)
Total shareholders’ equity	633,954	582,394
Total liabilities and shareholders’ equity	$ 2,082,309	$ 2,031,707