Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Operating activities:
Net income	$ 80,960	$ 48,438
Adjustments to reconcile net income to net cash provided by continuing operating activities:
Depreciation and amortization	64,727	28,030
Amortization of debt issuance costs	4,956	3,218
Equity-based compensation expense	13,844	9,249
Deferred income tax expense	16,821	24,682
Income from discontinued operations, net of taxes		(3)
(Gain) loss on foreign currency derivatives	(508)	908
Other	704	692
Change in operating assets and liabilities, net of effect of acquisitions:
Accounts receivable, net	(18,982)	(10,442)
Other current assets	(7,256)	(13,048)
Other assets	1,582	(1,218)
Accounts payable and other accrued liabilities	29,101	(4,313)
Accrued salaries and benefits	(3,846)	(225)
Other liabilities	3,728	4,619
Net cash provided by continuing operating activities	185,831	90,587
Net cash (used in) provided by discontinued operating activities	(2,973)	554
Net cash provided by operating activities	182,858	91,141
Investing activities:
Cash paid for acquisitions, net of cash acquired	(683,285)	(286,734)
Cash paid for capital expenditures	(177,718)	(122,035)
Cash paid for real estate acquisitions	(28,439)	(3,428)
Settlement of foreign currency derivatives	508	(908)
Other	(1,084)	(481)
Net cash used in investing activities	(890,018)	(413,586)
Financing activities:
Borrowings on long-term debt	1,480,000	875,000
Borrowings on revolving credit facility	158,000	180,000
Principal payments revolving credit facility	(166,000)	(180,000)
Principal payments on long-term debt	(29,869)	(15,875)
Repayment of assumed debt	(1,348,389)	(904,467)
Payment of debt issuance costs	(35,511)	(22,775)
Issuance of common stock, net	685,097	331,530
Common stock withheld for minimum statutory taxes, net	(7,365)	(7,826)
Excess tax benefit from equity awards		6,327
Other	(823)	(150)
Net cash provided by financing activities	735,140	261,764
Effect of exchange rate changes on cash	(8,479)	1,213
Net increase (decrease) in cash and cash equivalents	19,501	(59,468)
Cash and cash equivalents at beginning of the period	11,215	94,040
Cash and cash equivalents at end of the period	30,716	34,572
Effect of acquisitions:
Assets acquired, excluding cash	2,504,223	1,636,164
Liabilities assumed	(1,604,056)	(1,009,944)
Issuance of common stock in connection with acquisition	(216,882)	(380,210)
Deposits paid for acquisitions		40,724
Cash paid for acquisitions, net of cash acquired	$ 683,285	$ 286,734