Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current assets
Cash and cash equivalents	$ 38,263	$ 20,775
Restricted cash	43,712	27,285
Accounts receivable, net of allowance for doubtful accounts of $6,065 and $6,049, respectively	189,585	184,102
Related party receivables and prepaid expenses	719	715
Inventories, net	16,011	15,215
Prepaid expenses and other current assets	34,253	31,799
Total current assets	322,543	279,891
Property, plant and equipment, net of accumulated depreciation of $200,680 and $196,683, respectively	74,726	73,449
Operating lease right-of-use assets, net	51,326	53,937
Goodwill	358,211	358,323
Intangible assets, net	233,695	244,539
Deferred income tax assets	1,986	2,109
Other noncurrent assets	28,916	24,775
Total assets	1,071,403	1,037,023
Current liabilities
Accounts payable	63,953	61,744
Related party payables	1,475	1,484
Income tax payable	4,447	3,551
Accrued liabilities	95,106	113,519
Accrued compensation and benefits	57,164	60,860
Accrued interest	34,793	10,075
Customer deposits	16,780	17,707
Deferred revenue	18,192	16,617
Obligation for claim payment	62,886	46,902
Current portion of finance lease liabilities	6,148	6,683
Current portion of operating lease liabilities	15,352	15,923
Current portion of long-term debts	138,664	144,828
Total current liabilities	514,960	499,893
Long-term debt, net of current maturities	1,068,873	1,104,399
Finance lease liabilities, net of current portion	8,161	9,156
Pension liabilities, net	27,128	28,383
Deferred income tax liabilities	12,238	11,594
Long-term income tax liabilities	3,189	3,201
Operating lease liabilities, net of current portion	38,779	41,170
Other long-term liabilities	5,373	5,999
Total liabilities	1,678,701	1,703,795
Commitments and Contingencies (Note 8)
Stockholders' equity (deficit)
Common Stock, par value of $0.0001 per share; 1,600,000,000 shares authorized; 487,008,798 shares issued and 484,557,092 shares outstanding at March 31, 2022 and 267,646,667 shares issued and 265,194,961 shares outstanding at December 31, 2021	59	37
Additional paid in capital	953,364	838,853
Less: Common Stock held in treasury, at cost; 2,451,706 shares at March 31, 2022 and December 31, 2021	(10,949)	(10,949)
Equity-based compensation	56,235	56,123
Accumulated deficit	(1,589,384)	(1,532,428)
Accumulated other comprehensive loss:
Foreign currency translation adjustment	(5,986)	(7,463)
Unrealized pension actuarial losses, net of tax	(10,638)	(10,946)
Total accumulated other comprehensive loss	(16,624)	(18,409)
Total stockholders' deficit	(607,298)	(666,772)
Total liabilities and stockholders' deficit	1,071,403	1,037,023
Series A Preferred Stock
Stockholders' equity (deficit)
Preferred stock	1	1
Series B Preferred Stock
Stockholders' equity (deficit)
Preferred stock