CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash flows from operating activities:
Net income	$ 22,494	$ 8,911
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation and amortization	44,747	31,047
Provision for doubtful accounts	1,906	100
Amortization and write off of debt discount and debt issuance costs	279	236
Stock-based compensation	3,786	3,633
Deferred income taxes	2,379	(8,775)
Loss in equity method investments	2,033
Bargain purchase gain		(7,304)
Loss (gain) on disposition of long-lived assets	1,111	(29)
Gain on sale of investments	(1,055)
Impairment of long-lived assets		11,076
Loss on deconsolidation of subsidiary	529
Other non-cash activity	509
Changes in operating assets and liabilities, excluding the effects of acquisitions:
Accounts receivable	(6,062)	(2,902)
Materials and supplies, prepayments, and other current assets	(6,586)	(4,505)
Prepaid income taxes	995
Accounts payable and accrued liabilities, advance payments and deposits and other current liabilities	(3,331)	(4,713)
Accrued taxes	(7,876)	15,294
Other assets	2,887	(1,854)
Other liabilities	6,722	10,505
Net cash provided by operating activities	65,467	50,720
Cash flows from investing activities:
Capital expenditures	(78,549)	(42,727)
Purchase of securities		(2,000)
Divestiture of businesses, net of transferred cash $2.1 million	22,597
Acquisition of businesses, net of acquired cash of $0 and $8.3 million	(1,178)	(29,719)
Purchases of spectrum licenses and other intangible assets, including deposits	(36,832)	(10,860)
Acquisition of non-controlling interest in subsidiary		(7,045)
Proceeds from sale of investments	2,761
Change in restricted cash	1,756	1,134
Net cash used in investing activities	(89,445)	(91,217)
Cash flows from financing activities:
Dividends paid on common stock	(10,992)	(10,311)
Proceeds from new borrowings	8,571
Distribution to non-controlling interests	(3,373)	(4,302)
Payment of debt issuance costs	(326)
Proceeds from stock option exercises	274	164
Principal repayments of term loan	(5,447)	(4,759)
Purchase of common stock	(2,186)	(1,986)
Repurchases of non-controlling interests	(953)
Investments made by minority shareholders in consolidated affiliates	122	21,904
Net cash (used in) provided by financing activities	(14,310)	710
Effect of foreign currency exchange rates on cash and cash equivalents	207
Net change in cash and cash equivalents	(38,081)	(39,787)
Cash and cash equivalents, beginning of period	269,721	392,045
Cash and cash equivalents, end of period	231,640	352,258
Noncash investing activity
Purchases of property, plant and equipment included in accounts payable and accrued expenses	$ 13,107	$ 12,333