Condensed Consolidated Balance Sheets (unaudited) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current Assets:
Cash and cash equivalents	$ 130,881	$ 74,310
Accounts receivable	941,434	889,303
Prepaid income taxes	40,761	55,620
Other current assets	137,775	120,206
Total Current Assets	1,250,851	1,139,439
Operating lease right-of-use assets	1,102,710	1,078,754
Property and equipment, net	952,926	961,467
Goodwill	3,465,456	3,448,912
Identifiable intangible assets, net	368,850	374,879
Other assets	395,151	356,720
Total Assets	7,535,944	7,360,171
Current Liabilities:
Overdrafts	34,745	42,353
Current operating lease liabilities	234,420	229,334
Current portion of long-term debt and notes payable	24,513	17,572
Accounts payable	238,150	233,844
Accrued payroll	242,749	247,292
Accrued vacation	148,114	144,048
Accrued interest	9,932	29,002
Accrued other	232,297	244,312
Government advances	20,862	83,790
Unearned government assistance	194	93
Income taxes payable	3,175	1,437
Total Current Liabilities	1,189,151	1,273,077
Non-current operating lease liabilities	938,423	916,540
Long-term debt, net of current portion	3,738,299	3,556,385
Non-current deferred tax liability	156,407	142,792
Other non-current liabilities	105,098	106,442
Total Liabilities	6,127,378	5,995,236
Commitments and contingencies (Note 14)
Redeemable non-controlling interests	41,670	39,033
Stockholders’ Equity:
Common stock, $0.001 par value, 700,000,000 shares authorized, 133,884,817 and 131,769,303 shares issued and outstanding at 2021 and 2022, respectively	132	134
Capital in excess of par	489,794	504,314
Retained earnings	596,079	593,251
Accumulated other comprehensive income	52,135	12,282
Total Stockholders’ Equity	1,138,140	1,109,981
Non-controlling interests	228,756	215,921
Total Equity	1,366,896	1,325,902
Total Liabilities and Equity	$ 7,535,944	$ 7,360,171