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Condensed Consolidated Statement of Cash Flows - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Cash flows from operating activities:    
Net income (loss) $ 231,252 $ 133,898
Adjustments to reconcile net income (loss) to net cash provided by (used for) operating activities:    
Depreciation, amortization and accretion 584,164 553,901
Gains (losses) on retirement of long-term obligations 3,525 42,017
Amortization of deferred financing costs and other non-cash interest 5,256 7,993
Stock-based compensation expense 45,232 40,135
Asset write-down charges 4,972 19,912
Deferred income tax benefit (provision) 261 3,947
Other non-cash adjustments (3,486) 1,672
Changes in assets and liabilities, excluding the effects of acquisitions:    
Increase (decrease) in accrued interest 10,745 29,964
Increase (decrease) in accounts payable (16,928) (6,715)
Increase (decrease) in deferred revenues, deferred ground lease payables, other accrued liabilities and other liabilities 23,146 60,896
Decrease (increase) in receivables 91,252 84,776
Decrease (increase) in prepaid expenses, deferred site rental receivables, long-term prepaid rent, restricted cash and other assets (45,282) (54,215)
Net cash provided by (used for) operating activities 934,109 918,181
Cash flows from investing activities:    
Payment for acquisitions of businesses, net of cash acquired (2,103,503) (493,932)
Capital expenditures (563,361) (392,997)
Net receipts from settled swaps (328) 8,141
Other investing activities, net (7,032) 1,854
Net cash provided by (used for) investing activities (2,674,224) (876,934)
Cash flows from financing activities:    
Proceeds from issuance of long-term debt 1,345,115 4,501,206
Principal payments on long-term debt and other long-term obligations (59,947) (43,838)
Purchases and redemptions of long-term debt 0 (3,536,362)
Borrowings under revolving credit facility 1,755,000 3,030,000
Payments under revolving credit facility (1,405,000) (3,720,000)
Payments for financing costs (11,446) (35,604)
Proceeds from Issuance of Common Stock 464,023 323,798
Purchases of capital stock (22,594) (24,460)
Dividends/distributions paid on common stock (696,025) (597,846)
Dividends/distributions paid on preferred stock 0 (21,994)
Net (increase) decrease in restricted cash 2,351 (6,089)
Net cash provided by (used for) financing activities 1,371,477 (131,189)
Net increase (decrease) in cash and cash equivalents - continuing operations (368,638) (89,942)
Net Cash Provided by (Used in) Discontinued Operations [Abstract]    
Cash Provided by (Used in) Investing Activities, Discontinued Operations 0 113,150
Cash and Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect [Abstract]    
Net Cash Provided by (Used in) Discontinued Operations 0 113,150
Effect of Exchange Rate on Cash and Cash Equivalents [Abstract]    
Effect of exchange rate changes on cash 702 320
Cash and Cash Equivalents, at Carrying Value, Including Discontinued Operations, Period Start 567,599 178,810
Cash and Cash Equivalents, at Carrying Value, Including Discontinued Operations, Period End 199,663 $ 202,338
At the Market Program [Member]    
Cash flows from financing activities:    
Proceeds from Issuance of Common Stock $ 22,009