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Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash Flows from Operating Activities:
Net income	$ 121,035	$ 38,611
Adjustments to reconcile net income to net cash provided by (used in) operating activities—
Depreciation	52,216	48,719
Amortization of intangible assets	12,670	10,405
Change in fair value of contingent consideration liabilities	(84)	0
Equity in (earnings) losses of unconsolidated affiliates	(60,390)	13,343
Amortization of debt issuance costs	408	288
(Gain) loss on sale of property and equipment	(59)	963
Foreign currency (gain) loss	1,217	(651)
Provision for doubtful accounts	2,823	845
Deferred income tax provision	24,558	16,377
Non-cash stock-based compensation	13,012	14,687
Changes in operating assets and liabilities, net of non-cash transactions	(250,156)	(117,594)
Net cash provided by (used in) operating activities	(82,750)	25,993
Cash Flows from Investing Activities:
Capital expenditures	(68,626)	(66,807)
Proceeds from sale of property and equipment	10,843	5,769
Proceeds from insurance settlements related to property and equipment	8	0
Cash paid for acquisitions, net of cash, cash equivalents and restricted cash acquired	(51,553)	(30,728)
Investments in unconsolidated affiliates and other entities	(37,803)	(838)
Cash received from investments in unconsolidated affiliates and other entities	0	706
Cash paid for intangible assets	(25)	0
Net cash used in investing activities	(147,156)	(91,898)
Cash Flows from Financing Activities:
Borrowings under credit facility	1,647,074	974,948
Payments under credit facility	(1,347,442)	(760,369)
Payments on other long-term debt	(261)	(346)
Net repayments of short-term debt, net of borrowings	(23,220)	0
Distributions to non-controlling interests	(528)	(980)
Payments related to tax withholding for share-based compensation	(13,678)	(12,621)
Payments of dividends	(5,752)	0
Repurchase of common stock	(19,933)	(173,913)
Net cash provided by financing activities	236,260	26,719
Effect of foreign exchange rate changes on cash, cash equivalents and restricted cash	(118)	691
Net increase (decrease) in cash, cash equivalents and restricted cash	6,236	(38,495)
Cash, cash equivalents and restricted cash, beginning of period	83,256	143,775
Cash, cash equivalents and restricted cash, end of period	$ 89,492	$ 105,280

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