CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current assets
Cash and cash equivalents	$ 188,960	$ 156,042
Accounts receivable, net of allowance for doubtful accounts of $23,749 and $19,923	288,400	438,523
Inventories	33,776	55,090
Prepaid expenses and other current assets	115,137	129,460
Total current assets	626,273	779,115
Property, plant and equipment, at cost net of accumulated depreciation of $377,072 and $277,291	704,931	815,807
Operating lease assets	295,775	309,112
Goodwill	560,215	914,331
Intangible assets, net	893,721	1,012,564
Deferred income tax assets	97,369	76,297
Other assets	136,019	112,876
Total assets	3,314,303	4,020,102
Current liabilities
Accounts payable and accrued liabilities	340,840	453,628
Deferred revenue	207,597	218,823
Current portion of long-term debt	15,179	3,300
Other current liabilities	46,558	42,702
Total current liabilities	610,174	718,453
Long-term debt	1,615,984	1,636,335
Convertible debt	3,300	3,300
Deferred tax liabilities	6,256	9,052
Pension and other postretirement benefit obligations	198,220	235,906
Long-term operating lease liabilities	280,556	297,662
Other long-term liabilities	169,536	136,188
Total noncurrent liabilities	2,273,852	2,318,443
Total liabilities	2,884,026	3,036,896
Redeemable noncontrolling interests	4,148	1,850
Commitments and contingent liabilities (See Note 13)
Equity
Common stock of $0.01 par value per share, 2,000,000,000 shares authorized, 137,478,696 issued and 136,305,720 shares outstanding at September 30, 2020; 129,386,258 issued and 128,991,544 shares outstanding at December 31, 2019	1,375	1,294
Treasury stock at cost, 1,172,976 and 394,714 shares at September 30, 2020 and December 31, 2019, respectively	(4,841)	(2,876)
Additional paid-in capital	1,100,269	1,090,694
Accumulated deficit	(664,263)	(115,958)
Accumulated other comprehensive income (loss)	(6,411)	8,202
Total equity	426,129	981,356
Total liabilities and equity	$ 3,314,303	$ 4,020,102