UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 248,789	$ 195,397
Accounts receivable, net of allowance for doubtful accounts of $502 and $614, respectively	63,182	70,393
Income taxes receivable	2,795	0
Prepaid expenses and other	13,185	9,631
Current assets held for sale	1,101,193	1,133,294
Total current assets	1,429,144	1,408,715
Investments	13,793	13,769
Property, plant and equipment, net	495,599	440,427
Goodwill and Intangible assets, net	106,345	106,759
Operating lease right-of-use assets	54,254	50,387
Deferred charges and other assets	16,097	11,650
Total assets	2,115,232	2,031,707
Current liabilities:
Current maturities of long-term debt, net of unamortized loan fees	672,601	688,463
Accounts payable	23,538	19,599
Advanced billings and customer deposits	9,081	8,594
Accrued compensation	12,102	16,413
Income taxes payable	0	6,951
Current operating lease liabilities	2,272	1,970
Accrued liabilities and other	13,936	13,869
Current liabilities held for sale	423,008	452,202
Total current liabilities	1,156,538	1,208,061
Other long-term liabilities:
Deferred income taxes	179,416	150,652
Asset retirement obligations	5,490	4,955
Benefit plan obligations	12,763	14,645
Non-current operating lease liabilities	49,249	46,095
Other liabilities	23,989	24,905
Total other long-term liabilities	270,907	241,252
Commitments and contingencies
Shareholders’ equity:
Common stock, no par value, authorized 96,000; 49,950 and 49,868 issued and outstanding at June 30, 2021 and December 31, 2020, respectively	0	0
Additional paid in capital	46,681	47,317
Retained earnings	644,726	539,783
Accumulated other comprehensive loss, net of taxes	(3,620)	(4,706)
Total shareholders’ equity	687,787	582,394
Total liabilities and shareholders’ equity	$ 2,115,232	$ 2,031,707