CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities:
Net income	$ 1,519	$ 20,606
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation and amortization	65,904	52,913
Provision for doubtful accounts	3,041	1,058
Amortization and write off of debt discount and debt issuance costs	458	372
Stock-based compensation	5,437	5,032
Deferred income taxes	1,456	(8,775)
Loss in equity method investments	2,033
Bargain purchase gain		(7,304)
Loss on disposition of long-lived assets	513	27
Loss on damaged asset from hurricanes	35,213
Gain on sale of investments	(1,055)
Impairment of long-lived assets		11,425
Loss on deconsolidation of subsidiary	529
Other non-cash activity	512
Changes in operating assets and liabilities, excluding the effects of acquisitions and dispositions:
Accounts receivable	(8,456)	(2,234)
Materials and supplies, prepayments, and other current assets	(1,875)	(9,471)
Prepaid income taxes	995
Accounts payable and accrued liabilities, advance payments and deposits and other current liabilities	13,642	(2,854)
Accrued taxes	(8,966)	21,886
Other assets	3,794	(2,169)
Other liabilities	7,294	11,593
Net cash provided by operating activities	121,988	92,105
Cash flows from investing activities:
Capital expenditures	(108,276)	(78,455)
Strategic investments	(18,107)	(2,000)
Divestiture of businesses, net of transferred cash of $2.1 million	22,381
Acquisition of businesses, net of acquired cash of $0 and $12.6 million	(2,363)	(145,454)
Purchases of spectrum licenses and other intangible assets, including deposits	(36,832)	(10,860)
Acquisition of non-controlling interest in subsidiary		(7,045)
Purchase of short-term investments		(7,422)
Proceeds from sale of investments	2,761
Change in restricted cash	1,598	(28,287)
Proceeds from disposition of long-lived assets		1,424
Net cash used in investing activities	(138,838)	(278,099)
Cash flows from financing activities:
Dividends paid on common stock	(16,502)	(15,469)
Proceeds from new borrowings	8,571	60,000
Distribution to non-controlling interests	(3,583)	(7,667)
Payment of debt issuance costs	(326)	(494)
Proceeds from stock option exercises	933	612
Principal repayments of term loan	(5,447)	(7,982)
Purchase of common stock	(11,139)	(3,997)
Repurchases of non-controlling interests	(1,103)	(767)
Investments made by minority shareholders in consolidated affiliates	122	22,409
Net cash (used in) provided by financing activities	(28,474)	46,645
Effect of foreign currency exchange rates on cash and cash equivalents	200	(263)
Net change in cash and cash equivalents	(45,124)	(139,612)
Cash and cash equivalents, beginning of period	269,721	392,045
Cash and cash equivalents, end of period	224,597	252,433
Noncash investing activity
Purchases of property, plant and equipment included in accounts payable and accrued expenses	$ 15,668	$ 10,632