Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current assets
Cash and cash equivalents	$ 113,013	$ 6,198
Restricted cash	9,563	7,901
Accounts receivable, net of allowance for doubtful accounts of $5,508 and $4,975, respectively	242,757	261,400
Related party receivables	866	716
Inventories, net	17,353	19,047
Prepaid expenses and other current assets	30,271	23,663
Total current assets	413,823	318,925
Property, plant and equipment, net of accumulated depreciation of $180,378 and $176,995, respectively	107,586	113,637
Operating lease right-of-use assets, net	85,983	93,627
Goodwill	358,880	359,771
Intangible assets, net	329,837	342,443
Deferred income tax assets	11,661	12,032
Other noncurrent assets	20,293	17,889
Total assets	1,328,063	1,258,324
Current liabilities
Accounts payables	74,093	86,167
Related party payables	1,323	1,740
Income tax payable	2,532	352
Accrued liabilities	116,557	121,553
Accrued compensation and benefits	54,034	48,574
Accrued interest	23,786	48,769
Customer deposits	25,605	27,765
Deferred revenue	18,455	16,282
Obligation for claim payment	40,225	39,156
Current portion of finance lease liabilities	13,214	13,788
Current portion of operating lease liabilities	24,177	25,345
Current portion of long-term debts	36,691	36,490
Total current liabilities	430,692	465,981
Long-term debt, net of current maturities	1,520,619	1,398,385
Finance lease liabilities, net of current portion	16,954	20,272
Pension liabilities	28,600	25,681
Deferred income tax liabilities	7,473	7,996
Long-term income tax liabilities	2,795	2,806
Operating lease liabilities, net of current portion	66,848	73,282
Other long-term liabilities	7,508	6,962
Total liabilities	2,081,489	2,001,365
Commitments and Contingencies (Note 9)
Stockholders' equity (deficit)
Common stock, par value of $0.0001 per share; 1,600,000,000 shares authorized; 154,866,550 shares issued and 147,508,669 shares outstanding at March 31, 2020 and 153,638,836 shares issued and 150,851,689 shares outstanding at December 31, 2019	15	15
Preferred stock, par value of $0.0001 per share; 20,000,000 shares authorized; 3,290,050 shares issued and outstanding at March 31, 2020 and 4,294,233 shares issued and outstanding at December 31, 2019	1	1
Additional paid in capital	445,452	445,452
Less: Common Stock held in treasury, at cost; 7,357,881 shares at March 31, 2020 and 2,787,147 shares at December 31, 2019	(10,949)	(10,949)
Equity-based compensation	50,197	49,336
Accumulated deficit	(1,224,178)	(1,211,508)
Accumulated other comprehensive loss:
Foreign currency translation adjustment	(6,409)	(7,329)
Unrealized pension actuarial losses, net of tax	(7,555)	(8,059)
Total accumulated other comprehensive loss	(13,964)	(15,388)
Total stockholders’ deficit	(753,426)	(743,041)
Total liabilities and stockholders’ deficit	$ 1,328,063	$ 1,258,324