Condensed Consolidated Balance Sheets (unaudited) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Current Assets:
Cash and cash equivalents	$ 135,963	$ 175,178
Accounts receivable	798,805	706,676
Prepaid income taxes	18,804	20,539
Other current assets	96,721	90,131
Total Current Assets	1,050,293	992,524
Operating lease right-of-use assets	986,519
Property and equipment, net	997,467	979,810
Goodwill	3,382,656	3,320,726
Identifiable intangible assets, net	415,763	437,693
Other assets	322,058	233,512
Total Assets	7,154,756	5,964,265
Current Liabilities:
Overdrafts	0	25,083
Current operating lease liabilities	204,936
Current portion of long-term debt and notes payable	15,656	43,865
Accounts payable	136,801	146,693
Accrued payroll	170,294	172,386
Accrued vacation	119,286	110,660
Accrued interest	10,112	12,137
Accrued other	209,887	190,691
Income taxes payable	2,815	3,671
Total Current Liabilities	869,787	705,186
Non-current operating lease liabilities	836,205
Long-term debt, net of current portion	3,336,506	3,249,516
Non-current deferred tax liability	147,567	153,895
Other non-current liabilities	105,251	158,940
Total Liabilities	5,295,316	4,267,537
Commitments and contingencies (Note 13)
Redeemable non-controlling interests	953,697	780,488
Stockholders’ Equity:
Common stock, $0.001 par value, 700,000,000 shares authorized, 135,265,864 and 134,171,529 shares issued and outstanding at 2018 and 2019, respectively	134	135
Capital in excess of par	485,415	482,556
Retained earnings	269,169	320,351
Total Stockholders’ Equity	754,718	803,042
Non-controlling interests	151,025	113,198
Total Equity	905,743	916,240
Total Liabilities and Equity	$ 7,154,756	$ 5,964,265