UNAUDITED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash flows from operating activities:
Net income	$ 79,216	$ 152,829
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	86,719	59,184
Deferred taxes	7,145	33,989
Compensation expense related to share-based compensation plans	12,434	9,490
Contingent consideration adjustment		(4,703)
Gain on sale of assets	(1,313)	(1,458)
Gain on Disposition		(113,601)
Changes in operating assets and liabilities:
Restricted investments	(2,192)	(2,454)
Accounts receivable, net	41,000	(44,138)
Prepaid taxes	(4,622)	11,918
Prepaid expenses and other current assets	1,299	438
Other assets	(3,365)	1,572
Accounts payable	(89,800)	8,070
Accrued expenses	2,408	30,952
Non-current liabilities	(225)	4,358
Transaction costs for disposition		(5,665)
Net cash provided by operating activities	128,704	140,781
Cash flows from investing activities:
Proceeds from sale of equipment	9,072	4,035
Purchases of property and equipment	(55,616)	(138,847)
Acquisitions, net of cash acquired	(734)
Proceeds from the disposition of discontinued operations	19,439	227,986
Net cash (used in) provided by investing activities	(27,839)	93,174
Cash flows from financing activities:
Proceeds from issuance of debt	36,557	118,809
Repayments of long term debt	(79,147)	(107,341)
Stock tendered for payments of withholding taxes	(2,875)	(4,262)
Purchase of treasury stock	(24,998)
Finance lease payments	(2,206)	(2,181)
Net cash (used in) provided by financing activities	(72,669)	5,025
Effect of exchange rate changes on cash and cash equivalents	(3)	(30)
Net increase in cash and cash equivalents	28,193	238,950
Cash and cash equivalents beginning of the period	61,435	28,557
Cash and cash equivalents end of the period	89,628	267,507
Supplemental disclosures of cash paid for:
Interest	8,436	6,740
Income taxes	$ 32,917	$ 2,759