CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 462,049	$ 99,635
Short-term investments		110,801
Accounts receivable, net of allowance for credit losses	115,985	133,362
Income tax receivable		1,134
Prepaid expenses and other current assets	63,730	56,831
Assets held for sale	92,822	26,052
Total current assets	734,586	427,815
Property, plant and equipment, net	2,175,557	2,019,444
Investments	10,283	10,799
Goodwill	929,570	1,013,243
Customer relationships, net	50,801	73,939
Other intangible assets	10,557	10,557
Assets of discontinued operations		98,779
Other assets	57,626	58,116
Total assets	3,968,980	3,712,692
Current liabilities:
Accounts payable	30,445	40,953
Advance billings and customer deposits	48,466	53,028
Accrued compensation	65,722	68,272
Accrued interest	35,139	17,819
Accrued expense	108,867	97,417
Current portion of long-term debt and finance lease obligations	10,278	7,959
Liabilities held for sale	4,611	97
Total current liabilities	303,528	285,545
Long-term debt and finance lease obligations	2,125,994	2,118,853
Deferred income taxes	268,962	194,458
Pension and other post-retirement obligations	190,814	214,671
Other long-term liabilities	46,901	62,789
Total liabilities	2,936,199	2,876,316
Commitments and contingencies (Note 15)
Series A preferred stock, par value $0.01 per share; 10,000,000 shares authorized, 456,343 and 434,266 shares outstanding as of September 30, 2022 and December 31, 2021, respectively; liquidation preference of $466,695 and $436,943 as of September 30, 2022 and December 31, 2021, respectively	318,328	288,576
Shareholders' equity:
Common stock, par value $0.01 per share; 150,000,000 shares authorized, 115,395,668 and 113,647,364 shares outstanding as of September 30, 2022 and December 31, 2021, respectively	1,154	1,137
Additional paid-in capital	729,186	740,746
Retained earnings (accumulated deficit)	23,272	(141,599)
Accumulated other comprehensive loss, net	(46,639)	(59,571)
Noncontrolling interest	7,480	7,087
Total shareholders' equity	714,453	547,800
Total liabilities, mezzanine equity and shareholders' equity	$ 3,968,980	$ 3,712,692