Condensed Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash flow from operating activities
Net income (loss)	$ 42,039	$ (2,362)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	206,405	229,563
Amortization of deferred financing costs and debt discount	17,659	12,147
Deferred income taxes	(2,712)	(4,257)
Straight-line revenues	(1,416)	(7,400)
Stock-based compensation	5,085	4,095
Change in fair value of contingent consideration	(25,531)	(488)
Gain on sale of real estate	(28,790)
Other	2,252	1,597
Changes in assets and liabilities, net of acquisitions:
Accounts receivable	25,169	(22,971)
Other assets	(12,849)	(5,510)
Accounts payable, accrued expenses and other liabilities	23,053	26,559
Net cash provided by operating activities	250,364	230,973
Cash flow from investing activities
Acquisition of businesses, net of cash acquired	(4,210)
NMS asset acquisitions		(1,154)
Other capital expenditures	(180,478)	(163,467)
Proceeds from sale of real estate, net of cash	127,524
Net cash used in investing activities	(57,164)	(164,621)
Cash flow from financing activities
Principal payments on debt	(10,540)	(10,540)
Dividends paid	(120,161)	(212,043)
Payments of contingent consideration	(28,170)	(12,662)
Distributions paid to noncontrolling interest	(2,686)	(4,958)
Borrowings under revolving credit facility	139,000	245,000
Payments under revolving credit facility	(203,981)	(50,000)
Capital lease payments	(1,896)	(2,738)
Payments for financing costs	(49,462)
Common stock issuance, net of costs	21,641
Proceeds from issuance of notes	345,000
Proceeds from sale of warrants	50,819
Payment for bond hedge option	(70,035)
Employee stock purchase program	447
Net share settlement	(1,765)	(1,575)
Net cash provided by (used in) financing activities	68,211	(49,516)
Effect of exchange rates on cash and cash equivalents	(43)	(101)
Net increase in cash and cash equivalents	261,368	16,735
Cash and cash equivalents at beginning of period	38,026	59,765
Cash and cash equivalents at end of period	299,394	76,500
Non-cash investing and financing activities:
Property and equipment acquired but not yet paid	19,817	15,191
Tenant capital improvements	81,137	$ 92,190
Settlement of contingent consideration through non-cash consideration	11,178
Exchange of noncontrolling interest through non-cash consideration	$ 4,260