10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

____________________________________

FORM 10-Q

____________________________________

x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended March 31, 2017

OR

o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period              to             

Commission File Number 001-16441

____________________________________

CROWN CASTLE INTERNATIONAL CORP.

(Exact name of registrant as specified in its charter)

Delaware	76-0470458
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
1220 Augusta Drive, Suite 600, Houston, Texas 77057-2261 (Address of principal executives office) (Zip Code)
(713) 570-3000 (Registrant's telephone number, including area code)

____________________________________

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  x    No  o

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  x    No  o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer,a smaller reporting company, or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company," and "emerging growth company" in Rule 12b-2 of the Exchange Act.

Large accelerated filer	x	Accelerated filer	o
Non-accelerated filer	o	Smaller reporting company	o
		Emerging growth company	o
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act).    Yes  o    No  x

Number of shares of common stock outstanding at May 2, 2017: 366,108,734

CROWN CASTLE INTERNATIONAL CORP. AND SUBSIDIARIES

INDEX

		Page
PART I—FINANCIAL INFORMATION		2
ITEM 1.	FINANCIAL STATEMENTS	2
	CONDENSED CONSOLIDATED BALANCE SHEET	2
	CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) (Unaudited)	3
	CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS (Unaudited)	4
	CONDENSED CONSOLIDATED STATEMENT OF EQUITY (Unaudited)	5
	NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—Unaudited	6
ITEM 2.	MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS	15
ITEM 3.	QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK	26
ITEM 4.	CONTROLS AND PROCEDURES	27
PART II—OTHER INFORMATION		27
ITEM 1.	LEGAL PROCEEDINGS	27
ITEM 1A.	RISK FACTORS	27
ITEM 2.	UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS	27
ITEM 6.	EXHIBITS	27
SIGNATURES		28
EXHIBIT INDEX		29

Cautionary Language Regarding Forward-Looking Statements

This Quarterly Report on Form 10-Q ("Form 10-Q") contains forward-looking statements that are based on our management's expectations as of the filing date of this report with the Securities and Exchange Commission ("SEC"). Statements that are not historical facts are hereby identified as forward-looking statements. In addition, words such as "estimate," "anticipate," "project," "plan," "intend," "believe," "expect," "likely," "predicted," any variations of these words and similar expressions are intended to identify forward-looking statements. Such statements include plans, projections and estimates contained in "Part I—Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations" ("MD&A")and "Part I—Item 3. Quantitative and Qualitative Disclosures About Market Risk" herein. Such forward-looking statements include (1) expectations regarding anticipated growth in the wireless industry, carriers' investments in their networks, tenant additions, customer consolidation or ownership changes, or demand for our wireless infrastructure, (2) expectations regarding non-renewals of tenant leases (including the impact of our customers' decommissioning of the former Leap Wireless, MetroPCS and Clearwire networks (collectively, the "Acquired Networks")), (3) availability and adequacy of cash flows and liquidity for, or plans regarding, future discretionary investments including capital expenditures, (4) potential benefits of our discretionary investments, including acquisitions, (5) anticipated growth in our financial results, including future revenues, margins, Adjusted EBITDA, segment site rental gross margin, segment network services and other gross margin, segment operating profit, and operating cash flows, (6) expectations regarding our capital structure and the credit markets, our availability and cost of capital, or our ability to service our debt and comply with debt covenants and the benefits of any future refinancings, (7) expectations related to remaining qualified as a real estate investment trust ("REIT") and the advantages, benefits or impact of, or opportunities created by, our REIT status, (8) the realization and utilization of our net operating loss carryforwards ("NOLs"), (9) our dividend policy and the timing, amount, growth or tax characterization of any dividends, (10) the anticipated closing of the Proposed Wilcon Acquisition (as defined in note 12), and (11) our anticipated use of proceeds for the May 2017 Equity Financing and 4.75% Senior Notes offering (each of which is defined in note 12).

Such forward-looking statements should, therefore, be considered in light of various risks, uncertainties and assumptions, including prevailing market conditions, risk factors described in "Item 1A. Risk Factors" of our Annual Report on Form 10-K for the fiscal year ended December 31, 2016 ("2016 Form 10-K") and other factors. Should one or more of these risks or uncertainties materialize, or should underlying assumptions prove incorrect, actual results may vary materially from those expected. As used herein, the term "including," and any variation thereof, means "including without limitation." The use of the word "or" herein is not exclusive.

1

PART I—FINANCIAL INFORMATION

ITEM 1. FINANCIAL STATEMENTS

CROWN CASTLE INTERNATIONAL CORP. AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEET

(In thousands of dollars, except share amounts)

	March 31, 2017			December 31, 2016
	(Unaudited)
ASSETS
Current assets:
Cash and cash equivalents	$	205,192		$	567,599
Restricted cash	115,128			124,547
Receivables, net	302,697			373,532
Prepaid expenses	153,337			128,721
Other current assets	140,095			130,362
Total current assets	916,449			1,324,761
Deferred site rental receivables	1,310,233			1,317,658
Property and equipment, net of accumulated depreciation of $6,823,519 and $6,613,219, respectively	10,293,693			9,805,315
Goodwill	6,530,001			5,757,676
Other intangible assets, net	3,894,362			3,650,072
Long-term prepaid rent and other assets, net	832,104			819,610
Total assets	$	23,776,842		$	22,675,092
LIABILITIES AND EQUITY
Current liabilities:
Accounts payable	$	154,753		$	188,516
Accrued interest	84,218			97,019
Deferred revenues	366,758			353,005
Other accrued liabilities	183,584			221,066
Current maturities of debt and other obligations	112,882			101,749
Total current liabilities	902,195			961,355
Debt and other long-term obligations	13,380,091			12,069,393
Other long-term liabilities	2,131,076			2,087,229
Total liabilities	16,413,362			15,117,977
Commitments and contingencies (note 8)
CCIC stockholders' equity:
Common stock, $.01 par value; 600,000,000 shares authorized; shares issued and outstanding: March 31, 2017—361,355,043 and December 31, 2016—360,536,659	3,614			3,605
Additional paid-in capital	10,968,564			10,938,236
Accumulated other comprehensive income (loss)	(5,713		)	(5,888		)
Dividends/distributions in excess of earnings	(3,602,985		)	(3,378,838		)
Total equity	7,363,480			7,557,115
Total liabilities and equity	$	23,776,842		$	22,675,092

See notes to condensed consolidated financial statements.

2

CROWN CASTLE INTERNATIONAL CORP. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS AND

COMPREHENSIVE INCOME (LOSS) (Unaudited)

(In thousands of dollars, except per share amounts)

	Three Months Ended March 31,
	2017			2016
Net revenues:
Site rental	$	856,936		$	799,294
Network services and other	159,006			135,090
Net revenues	1,015,942			934,384
Operating expenses:
Costs of operations(a):
Site rental	265,017			252,621
Network services and other	98,808			80,971
General and administrative	100,724			97,581
Asset write-down charges	645			7,959
Acquisition and integration costs	5,650			5,638
Depreciation, amortization and accretion	288,549			277,875
Total operating expenses	759,393			722,645
Operating income (loss)	256,549			211,739
Interest expense and amortization of deferred financing costs	(134,487		)	(126,378		)
Gains (losses) on retirement of long-term obligations	(3,525		)	(30,550		)
Interest income	370			174
Other income (expense)	4,600			(3,273		)
Income (loss) before income taxes	123,507			51,712
Benefit (provision) for income taxes	(4,369		)	(3,872		)
Net income (loss)	119,138			47,840
Dividends on preferred stock	—			(10,997		)
Net income (loss) attributable to CCIC common stockholders	$	119,138		$	36,843
Net income (loss)	$	119,138		$	47,840
Other comprehensive income (loss):
Foreign currency translation adjustments	175			(579		)
Total other comprehensive income (loss)	175			(579		)
Comprehensive income (loss) attributable to CCIC stockholders	$	119,313		$	47,261
Net income (loss) attributable to CCIC common stockholders, per common share:
Net income (loss) attributable to CCIC common stockholders, basic	$	0.33		$	0.11
Net income (loss) attributable to CCIC common stockholders, diluted	$	0.33		$	0.11
Weighted-average common shares outstanding (in thousands):
Basic	360,832			334,155
Diluted	361,727			334,929

________________

(a) Exclusive of depreciation, amortization and accretion shown separately.

See notes to condensed consolidated financial statements.

3

CROWN CASTLE INTERNATIONAL CORP. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS (Unaudited)

(In thousands of dollars)

	Three Months Ended March 31,
	2017			2016
Cash flows from operating activities:
Net income (loss)	$	119,138		$	47,840
Adjustments to reconcile net income (loss) to net cash provided by (used for) operating activities:
Depreciation, amortization and accretion	288,549			277,875
Gains (losses) on retirement of long-term obligations	3,525			30,550
Amortization of deferred financing costs and other non-cash interest	2,836			4,211
Stock-based compensation expense	22,226			19,895
Asset write-down charges	645			7,959
Deferred income tax benefit (provision)	149			1,860
Other non-cash adjustments, net	(4,440		)	2,166
Changes in assets and liabilities, excluding the effects of acquisitions:
Increase (decrease) in accrued interest	(12,801		)	10,698
Increase (decrease) in accounts payable	(29,849		)	(9,417		)
Increase (decrease) in deferred revenues, deferred ground lease payables, other accrued liabilities and other liabilities	(18,446		)	16,145
Decrease (increase) in receivables	92,102			58,991
Decrease (increase) in prepaid expenses, deferred site rental receivables, long-term prepaid rent, restricted cash and other assets	(17,542		)	(31,117		)
Net cash provided by (used for) operating activities	446,092			437,656
Cash flows from investing activities:
Payments for acquisitions of businesses, net of cash acquired	(1,497,253		)	(22,029		)
Capital expenditures	(262,415		)	(193,489		)
Net (payments) receipts from settled swaps	(328		)	8,141
Other investing activities, net	(3,145		)	(369		)
Net cash provided by (used for) investing activities	(1,763,141		)	(207,746		)
Cash flows from financing activities:
Proceeds from issuance of long-term debt	997,890			3,496,901
Principal payments on debt and other long-term obligations	(28,738		)	(14,152		)
Purchases and redemptions of long-term debt	—			(2,876,390		)
Borrowings under revolving credit facility	1,405,000			2,065,000
Payments under revolving credit facility	(1,070,000		)	(2,980,000		)
Payments for financing costs	(6,761		)	(27,421		)
Net proceeds from issuance of capital stock	21,937			323,798
Purchases of capital stock	(22,005		)	(24,354		)
Dividends/distributions paid on common stock	(348,146		)	(299,090		)
Dividends paid on preferred stock	—			(10,997		)
Net (increase) decrease in restricted cash	5,039			1,113
Net cash provided by (used for) financing activities	954,216			(345,592		)
Net increase (decrease) in cash and cash equivalents - continuing operations	(362,833		)	(115,682		)
Discontinued operations:
Net cash provided by (used for) investing activities	—			113,150
Net increase (decrease) in cash and cash equivalents - discontinued operations	—			113,150
Effect of exchange rate changes	426			(576		)
Cash and cash equivalents at beginning of period	567,599			178,810
Cash and cash equivalents at end of period	$	205,192		$	175,702

See notes to condensed consolidated financial statements.

4

CROWN CASTLE INTERNATIONAL CORP. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENT OF EQUITY

(In thousands of dollars, except share data) (Unaudited)

	CCIC Stockholders
	Common Stock					4.50% Mandatory Convertible Preferred Stock						Accumulated Other Comprehensive Income (Loss) ("AOCI")
	Shares		($.01 Par)			Shares	($.01 Par)		Additional paid-in capital			Foreign Currency Translation Adjustments			Derivative Instruments, net of tax		Dividends/Distributions in Excess of Earnings			Noncontrolling Interest from discontinued operations		Total
Balance, January 1, 2017	360,536,659		$	3,605		—	$	—	$	10,938,236		$	(5,888	)	$	—	$	(3,378,838	)	$	—	$	7,557,115
Stock-based compensation related activity, net of forfeitures	822,692		9			—	—		30,396			—			—		—			—		30,405
Purchases and retirement of Common Stock	(246,608	)	(2		)	—	—		(22,003		)	—			—		—			—		(22,005		)
Net proceeds from issuance of Common Stock	242,300		2			—	—		21,935			—			—		—			—		21,937
Other comprehensive income (loss)(a)	—		—			—	—		—			175			—		—			—		175
Common stock dividends/distributions	—		—			—	—		—			—			—		(343,285		)	—		(343,285		)
Net income (loss)	—		—			—	—		—			—			—		119,138			—		119,138
Balance, March 31, 2017	361,355,043		$	3,614		—	$	—	$	10,968,564		$	(5,713	)	$	—	$	(3,602,985	)	$	—	$	7,363,480

(a) See the condensed statement of operations and other comprehensive income (loss) for the components of "other comprehensive income (loss)."

	CCIC Stockholders
	Common Stock					4.50% Mandatory Convertible Preferred Stock						AOCI
	Shares		($.01 Par)			Shares	($.01 Par)		Additional paid-in capital			Foreign Currency Translation Adjustments			Derivative Instruments, net of tax		Dividends/Distributions in Excess of Earnings			Noncontrolling Interest from discontinued operations		Total
Balance, January 1, 2016	333,771,660		$	3,338		9,775,000	$	98	$	9,548,580		$	(4,398	)	$	—	$	(2,458,397	)	$	—	$	7,089,221
Stock-based compensation related activity, net of forfeitures	243,110		2			—	—		26,873			—			—		—			—		26,875
Purchases and retirement of Common Stock	(283,116	)	(3		)	—	—		(24,351		)	—			—		—			—		(24,354		)
Net proceeds from issuance of Common Stock	3,828,064		38			—	—		323,760			—			—		—			—		323,798
Other comprehensive income (loss)(a)	—		—			—	—		—			(579		)	—		—			—		(579		)
Common stock dividends/distributions	—		—			—	—		—			—			—		(298,810		)	—		(298,810		)
Preferred stock dividends	—		—			—	—		—			—			—		(10,997		)	—		(10,997		)
Net income (loss)	—		—			—	—		—			—			—		47,840			—		47,840
Balance, March 31, 2016	337,559,718		$	3,375		9,775,000	$	98	$	9,874,862		$	(4,977	)	$	—	$	(2,720,364	)	$	—	$	7,152,994

(a) See the condensed statement of operations and other comprehensive income (loss) for the components of "other comprehensive income (loss)."

See notes to condensed consolidated financial statements.

5

CROWN CASTLE INTERNATIONAL CORP. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS-Unaudited

(Tabular dollars in thousands, except per share amounts)

1. General

The information contained in the following notes to the consolidated financial statements is condensed from that which would appear in the annual consolidated financial statements; accordingly, the consolidated financial statements included herein should be reviewed in conjunction with the consolidated financial statements for the fiscal year ended December 31, 2016, and related notes thereto, included in the 2016 Form 10-K filed by Crown Castle International Corp. ("CCIC") with the SEC. References to the "Company" include CCIC and its predecessor, as applicable, and their subsidiaries, unless otherwise indicated or the context indicates otherwise. As used herein, the term "including," and any variation thereof means "including without limitation." The use of the word "or" herein is not exclusive.

The Company owns, operates and leases shared wireless infrastructure that has been acquired or constructed over time and is geographically dispersed throughout the United States and Puerto Rico ("U.S."), including: (1) towers and other structures, such as rooftops (collectively, "towers"), and (2) fiber primarily supporting small cell networks (collectively, "small cells" and, together with towers, "wireless infrastructure").

The Company's core business is providing access, including space or capacity, to its shared wireless infrastructure via long-term contracts in various forms, including licenses, subleases and lease agreements.

The Company's operating segments consist of (1) Towers and (2) Small Cells. See note 10.

As part of the Company's effort to provide comprehensive wireless infrastructure solutions, the Company offers certain network services relating to its wireless infrastructure, consisting of (1) site development services relating to existing or new tenant equipment installations on its wireless infrastructure, including: site acquisition, architectural and engineering, or zoning and permitting and (2) tenant equipment installation or subsequent augmentations.

The Company operates as a REIT for U.S. federal income tax purposes. In addition, the Company has certain taxable REIT subsidiaries ("TRSs"). See note 6.

Approximately 53% of the Company's towers are leased or subleased or operated and managed under master leases, subleases, and other agreements with AT&T, Sprint, and T-Mobile. The Company has the option to purchase these towers at the end of their respective lease terms. The Company has no obligation to exercise such purchase options.

Basis of Presentation

The condensed consolidated financial statements included herein are unaudited; however, they include all adjustments (consisting only of normal recurring adjustments) which, in the opinion of management, are necessary to state fairly the consolidated financial position of the Company at March 31, 2017, and the consolidated results of operations and the consolidated cash flows for the three months ended March 31, 2017 and 2016. The year-end condensed consolidated balance sheet data was derived from audited financial statements, but does not include all disclosures required by GAAP. The results of operations for the interim periods presented are not necessarily indicative of the results to be expected for the full year.

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities as of the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

2. Summary of Significant Accounting Policies

The significant accounting policies used in the preparation of the Company's condensed consolidated financial statements are disclosed in the 2016 Form 10-K, other than certain recent accounting pronouncements described below.

Recently Adopted Accounting Pronouncements

No accounting pronouncements adopted during the three months ended March 31, 2017 had a material impact on the Company's condensed consolidated financial statements.

6

CROWN CASTLE INTERNATIONAL CORP. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS-Unaudited (Continued)

(Tabular dollars in thousands, except per share amounts)

Recent Accounting Pronouncements Not Yet Adopted

In February 2017, the FASB issued new guidance which clarifies the scope and application on accounting for the de-recognition of non-financial assets and in substance non-financial assets, including sales and partial sales of real estate assets. The new guidance also eliminates the existing industry specific guidance for partial sales of real estate, and requires full gain recognition upon partial sales of real estate. The guidance is effective for the Company as of January 1, 2018. The guidance may be early adopted, but must be adopted concurrently with the FASB's May 2014 guidance on revenue from contracts with customers. The guidance is required to be applied, at the Company's election, either (1) retrospectively to each prior reporting period presented, or (2) with the cumulative effect being recognized at the date of initial application. The Company does not expect this guidance to have a material impact on its condensed consolidated financial statements.

3. Acquisitions

FiberNet Acquisition

On November 1, 2016, the Company announced a definitive agreement to acquire FPL FiberNet Holdings, LLC and certain other subsidiaries of NextEra Energy, Inc. (collectively, "FiberNet") for approximately $1.5 billion in cash, subject to certain limited adjustments ("FiberNet Acquisition"). FiberNet is a fiber services provider in Florida and Texas that, as of the agreement date, owned or had rights to approximately 11,500 route miles of fiber installed and under construction, inclusive of approximately 6,000 route miles in top metro markets. On January 17, 2017, the Company closed on the FiberNet Acquisition which was financed using proceeds from its November 2016 Equity Financing and borrowings under the 2016 Revolver (see note 4).

The preliminary purchase price allocation for the FiberNet Acquisition is shown below and is based upon a preliminary valuation which is subject to change as the Company obtains additional information with respect to fixed assets, intangible assets and certain liabilities.

Preliminary Purchase Price Allocation
Current Assets	$	56,456
Property and equipment	450,382
Goodwill(a)	766,739
Other intangible assets, net	325,238
Other non-current assets	72
Current liabilities	(34,097		)
Other non-current liabilities	(42,901		)
Net assets acquired(b)	$	1,521,889

(a) The preliminary purchase price allocation for the FiberNet Acquisition resulted in the recognition of goodwill based on:

• the Company's expectation to leverage the FiberNet fiber footprint to support new small cell networks,

• the complementary nature of the FiberNet fiber to the Company's existing fiber assets and its location in top metro markets where the Company expects to see wireless carrier network investments,

• the Company's belief that the acquired fiber assets are well positioned to benefit from the continued growth trends in the wireless industry, and

• other intangibles not qualified for separate recognition, including the assembled workforce.

(b) The vast majority of assets acquired in the FiberNet Acquisition are expected to be included in the Company's REIT and as such, no deferred taxes were recorded in connection with the FiberNet Acquisition.

Net revenues attributable to the FiberNet Acquisition are included in the Company's consolidated statements of operations and comprehensive income (loss) since the date the acquisition was completed. For the three months ended March 31, 2017, the FiberNet Acquisition contributed $31.9 million to consolidated net revenues.

See note 12 for a discussion of the Proposed Wilcon Acquisition (as hereinafter defined).

7

CROWN CASTLE INTERNATIONAL CORP. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS-Unaudited (Continued)

(Tabular dollars in thousands, except per share amounts)

4. Debt and Other Obligations

	Original Issue Date	Contractual Maturity Date (a)		Balance as of March 31, 2017(f)			Balance as of December 31, 2016(f)		Stated Interest Rate as of March 31, 2017(a)
Bank debt - variable rate:
2016 Revolver	Jan. 2016	Jan. 2022	(e)	$	335,000	(b)(d)	$	—	2.4	%
2016 Term Loan A	Jan. 2016	Jan. 2022	(e)	2,441,545		(e)	1,954,173		2.4	%
Total bank debt				2,776,545			1,954,173
Securitized debt - fixed rate:
Secured Notes, Series 2009-1, Class A-1	July 2009	Aug. 2019		46,059			51,416		6.3	%
Secured Notes, Series 2009-1, Class A-2	July 2009	Aug. 2029		69,405			68,737		9.0	%
Tower Revenue Notes, Series 2010-3	Jan. 2010	Jan. 2040	(c)	1,244,704			1,244,237		6.1	%
Tower Revenue Notes, Series 2010-6	Aug. 2010	Aug. 2040	(c)	994,006			993,557		4.9	%
Tower Revenue Notes, Series 2015-1	May 2015	May 2042	(c)	296,733			296,573		3.2	%
Tower Revenue Notes, Series 2015-2	May 2015	May 2045	(c)	691,545			691,285		3.7	%
Total securitized debt				3,342,452			3,345,805
Bonds - fixed rate:
5.250% Senior Notes	Oct. 2012	Jan. 2023		1,637,626			1,637,099		5.3	%
3.849% Secured Notes	Dec. 2012	Apr. 2023		991,625			991,279		3.9	%
4.875% Senior Notes	Apr. 2014	Apr. 2022		840,761			840,322		4.9	%
3.400% Senior Notes	Feb./May 2016	Feb. 2021		849,784			849,698		3.4	%
4.450% Senior Notes	Feb. 2016	Feb. 2026		890,374			890,118		4.5	%
3.700% Senior Notes	May 2016	June 2026		742,112			741,908		3.7	%
2.250% Senior Notes	Sept. 2016	Sept. 2021		694,441			693,893		2.3	%
4.000% Senior Notes	Feb. 2017	Sept. 2027		493,403		(d)	—		4.0	%
Total bonds				7,140,126			6,644,317
Other:
Capital leases and other obligations	Various	Various		233,850			226,847		Various
Total debt and other obligations				13,492,973			12,171,142
Less: current maturities and short-term debt and other current obligations				112,882			101,749
Non-current portion of long-term debt and other long-term obligations				$	13,380,091		$	12,069,393

(a) See the 2016 Form 10-K, including note 8, for additional information regarding the maturity and principal amortization provisions and interest rates relating to the Company's indebtedness.

(b) As of March 31, 2017, the undrawn availability under the 2016 Revolver was $2.2 billion.

(c) If the respective series of such debt is not paid in full on or prior to an applicable date then Excess Cash Flow (as defined in the indenture) of the issuers of such notes will be used to repay principal of the applicable series, and additional interest (of an additional approximately 5% per annum) will accrue on the respective series. See the 2016 Form 10-K for additional information regarding these provisions.

(d) In February 2017 the Company issued $500 million aggregate principal amount of 4.000% senior unsecured notes with a final maturity date of March 2027 ("February 2017 Senior Notes"). The Company used the net proceeds from the February 2017 Senior Notes offering to repay a portion of the borrowings under the 2016 Revolver.

(e) In February 2017, the Company entered into an amendment to the Credit Facility to (1) incur additional term loans in an aggregate principal amount of $500 million, and (2) extend the maturity of both the 2016 Term Loan A and the 2016 Revolver to January 2022.

(f) Balances reflect debt issuance costs as a direct reduction from the respective carrying amounts of debt, with the exception of debt issuance costs associated with the Company's revolving credit facilities. See note 2.

See note 12 for information regarding our May 2017 financing activities.

8

CROWN CASTLE INTERNATIONAL CORP. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS-Unaudited (Continued)

(Tabular dollars in thousands, except per share amounts)

Contractual Maturities

The following are the scheduled contractual maturities of the total debt and other long-term obligations of the Company outstanding as of March 31, 2017. These maturities reflect contractual maturity dates and do not consider the principal payments that will commence following the anticipated repayment dates on the Tower Revenue Notes.

	Nine Months Ending December 31,		Years Ending December 31,												Unamortized Adjustments, Net			Total Debt and Other Obligations Outstanding
	2017		2018		2019		2020		2021		Thereafter		Total Cash Obligations
Scheduled contractual maturities	$	87,221	$	111,470	$	164,485	$	152,764	$	1,822,635	$	11,244,908	$	13,583,483	$	(90,510	)	$	13,492,973

Interest Expense and Amortization of Deferred Financing Costs

The components of interest expense and amortization of deferred financing costs are as follows:

	Three Months Ended March 31,
	2017			2016
Interest expense on debt obligations	$	131,651		$	122,167
Amortization of deferred financing costs and adjustments on long-term debt	4,551			5,106
Other, net of capitalized interest	(1,715		)	(895		)
Total	$	134,487		$	126,378

5. Fair Value Disclosures

	Level in Fair Value Hierarchy	March 31, 2017				December 31, 2016
		Carrying  Amount		Fair Value		Carrying  Amount		Fair Value
Assets:
Cash and cash equivalents	1	$	205,192	$	205,192	$	567,599	$	567,599
Restricted cash, current and non-current	1	120,128		120,128		129,547		129,547
Liabilities:
Total debt and other obligations	2	13,492,973		14,005,423		12,171,142		12,660,013

The fair value of cash and cash equivalents and restricted cash approximate the carrying value. The Company determines the fair value of its debt securities based on indicative, non-binding quotes from brokers. Quotes from brokers require judgment and are based on the brokers' interpretation of market information, including implied credit spreads for similar borrowings on recent trades or bid/ask prices or quotes from active markets if available. There were no changes since December 31, 2016 in the Company's valuation techniques used to measure fair values.

9

CROWN CASTLE INTERNATIONAL CORP. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS-Unaudited (Continued)

(Tabular dollars in thousands, except per share amounts)

6. Income Taxes

The Company operates as a REIT for U.S. federal income tax purposes. As a REIT, the Company is generally entitled to a deduction for dividends that it pays and therefore is not subject to U.S. federal corporate income tax on its net taxable income that is currently distributed to its stockholders. The Company also may be subject to certain federal, state, local, and foreign taxes on its income and assets, including (1) alternative minimum taxes, (2) taxes on any undistributed income, (3) taxes related to the TRSs, (4) certain state, local, or foreign income taxes, (5) franchise taxes, (6) property taxes, and (7) transfer taxes. In addition, the Company could in certain circumstances be required to pay an excise or penalty tax, which could be significant in amount, in order to utilize one or more relief provisions under the Internal Revenue Code of 1986, as amended ("Code") to maintain qualification for taxation as a REIT.

The Company's TRS assets and operations will continue to be subject, as applicable, to federal and state corporate income taxes or to foreign taxes in the jurisdictions in which such assets and operations are located. The Company's foreign assets and operations (including its tower operations in Puerto Rico) most likely will be subject to foreign income taxes in the jurisdictions in which such assets and operations are located, regardless of whether they are included in a TRS or not.

For the three months ended March 31, 2017 and 2016, the Company's effective tax rate differed from the federal statutory rate predominately due to the Company's REIT status, including the dividends paid deduction.

7. Per Share Information

Basic net income (loss) attributable to CCIC common stockholders, per common share, excludes dilution and is computed by dividing net income (loss) attributable to CCIC common stockholders by the weighted-average number of common shares outstanding during the period. Diluted net income (loss) attributable to CCIC common stockholders, per common share is computed by dividing net income (loss) attributable to CCIC common stockholders by the weighted-average number of common shares outstanding during the period plus any potential dilutive common share equivalents, including shares issuable (1) upon the vesting of restricted stock awards and restricted stock units as determined under the treasury stock method and (2) upon conversion of the Company's previously outstanding Convertible Preferred Stock, which converted to common stock during the fourth quarter of 2016, as determined under the if-converted method, for the three months ended March 31, 2016.

	Three Months Ended March 31,
	2017		2016
Net income (loss) attributable to CCIC stockholders	$	119,138	$	47,840
Dividends on preferred stock	—		(10,997		)
Net income (loss) attributable to CCIC common stockholders for basic and diluted computations	$	119,138	$	36,843
Weighted-average number of common shares outstanding (in thousands):
Basic weighted-average number of common stock outstanding	360,832		334,155
Effect of assumed dilution from potential common shares relating to restricted stock units and restricted stock awards	895		774
Diluted weighted-average number of common shares outstanding	361,727		334,929
Net income (loss) attributable to CCIC common stockholders, per common share:
Basic	0.33		0.11
Diluted	0.33		0.11

During the three months ended March 31, 2017, the Company granted 1.2 million restricted stock units. For the three months ended March 31, 2016, 11.4 million common share equivalents, respectively, related to the previously outstanding Convertible Preferred Stock were excluded from the dilutive common shares because the impact of such conversion would be anti-dilutive, based on the Company's common stock price as of the end of the respective periods.

10

CROWN CASTLE INTERNATIONAL CORP. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS-Unaudited (Continued)

(Tabular dollars in thousands, except per share amounts)

8. Commitments and Contingencies

The Company is involved in various claims, lawsuits or proceedings arising in the ordinary course of business. While there are uncertainties inherent in the ultimate outcome of such matters and it is impossible to presently determine the ultimate costs or losses that may be incurred, if any, management believes the resolution of such uncertainties and the incurrence of such costs should not have a material adverse effect on the Company's consolidated financial position or results of operations. Additionally, the Company and certain of its subsidiaries are contingently liable for commitments or performance guarantees arising in the ordinary course of business, including certain letters of credit or surety bonds. In addition, the Company has the option to purchase approximately 53% of the Company's towers at the end of their respective lease terms. The Company has no obligation to exercise such purchase options.

9. Equity

Declaration and Payment of Dividends

During the three months ended March 31, 2017, the following dividend was declared and paid:

Equity Type	Declaration Date	Record Date	Payment Date	Dividends Per Share		Aggregate Payment Amount (In millions)
Common Stock	February 17, 2017	March 17, 2017	March 31, 2017	$	0.95	$	343.3	(a)

(a) Inclusive of dividends accrued for holders of unvested restricted stock units, which are paid at the time the restricted stock units vest.

Purchases of the Company's Common Stock

For the three months ended March 31, 2017, the Company purchased 0.2 million shares of its common stock utilizing $22.0 million in cash. The common stock shares purchased relate to shares withheld in connection with the payment of withholding taxes upon vesting of restricted stock.

"At the Market" Stock Offering Program

The Company maintains an "at the market" stock offering program ("ATM Program") through which it may, from time to time, issue and sell shares of its common stock having an aggregate cumulative gross sales price of up to $500.0 million to or through sales agents. Sales, if any, under the ATM Program may be made by means of ordinary brokers' transactions on the New York Stock Exchange or otherwise at market prices prevailing at the time of sale, at prices related to prevailing market prices or, subject to specific instructions of the Company, at negotiated prices. The Company intends to use the net proceeds from any sales under the ATM Program for general corporate purposes, which may include the funding of future acquisitions or investments and the repayment or repurchase of any outstanding indebtedness. During the three months ended March 31, 2017, 0.2 million shares of common stock were sold under the ATM Program generating net proceeds of $22.0 million after giving effect to sales agent commissions of $0.2 million. As of March 31, 2017, the Company had approximately $150 million of gross sales of common stock availability remaining on the ATM Program.

See note 12 for information regarding our May 2017 financing activities.

11

CROWN CASTLE INTERNATIONAL CORP. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS-Unaudited (Continued)

(Tabular dollars in thousands, except per share amounts)

10. Operating Segments

The Company's operating segments are (1) Towers and (2) Small Cells. The Towers segment provides access, including space or capacity, to the Company's approximately 40,000 towers geographically dispersed throughout the U.S. The Towers segment also reflects certain network services relating to the Company's towers, consisting of site development services and installation services. The Small Cells segment provides access, including space or capacity, to the Company's approximately 27,500 route miles of fiber primarily supporting small cell networks. To a lesser extent, the Small Cells segment also offers other fiber based solutions.

The measurement of profit or loss used by the Company's chief operating decision maker to evaluate the results of operations of its operating segments are (1) segment site rental gross margin, (2) segment network services and other gross margin, and (3) segment operating profit. The Company defines segment site rental gross margin as segment site rental revenues less segment site rental cost of operations, which excludes stock-based compensation expense and prepaid lease purchase price adjustments recorded in consolidated cost of operations. The Company defines segment network services and other gross margin as segment network services and other revenues less segment network services and other cost of operations, which excludes stock-based compensation expense recorded in consolidated cost of operations. The Company defines segment operating profit as segment site rental gross margin plus segment network services and other gross margin, less general and administrative expenses attributable to the respective segment.

Costs that are directly attributable to Towers and Small Cells are assigned to those respective segments. The "Other" column (1) represents amounts excluded from specific segments, such as restructuring charges (credits), asset write-down charges, acquisition and integration costs, depreciation, amortization and accretion, amortization of prepaid lease purchase price adjustments, interest expense and amortization of deferred financing costs, gains (losses) on retirement of long-term obligations, net gain (loss) on interest rate swaps, gains (losses) on foreign currency swaps, impairment of available-for-sale securities, interest income, other income (expense), cumulative effect of a change in accounting principle, income (loss) from discontinued operations, and stock-based compensation expense, and (2) reconciles segment operating profit to income (loss) before income taxes, as the amounts are not utilized in assessing each segment’s performance. The "Other" total assets balance includes corporate assets such as cash and cash equivalents which have not been allocated to specific segments. There are no significant revenues resulting from transactions between the Company's operating segments.

12

CROWN CASTLE INTERNATIONAL CORP. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS-Unaudited (Continued)

(Tabular dollars in thousands, except per share amounts)

	Three Months Ended March 31, 2017									Three Months Ended March 31, 2016
	Towers		Small Cells		Other			Consolidated Total		Towers		Small Cells		Other			Consolidated Total
Segment site rental revenues	$	716,536	$	140,400				$	856,936	$	702,840	$	96,454				$	799,294
Segment network services and other revenues	149,615		9,391					159,006		125,010		10,080					135,090
Segment revenues	866,151		149,791					1,015,942		827,850		106,534					934,384
Segment site rental cost of operations	209,464		47,246					256,710		204,565		37,483					242,048
Segment network services and other cost of operations	88,936		8,229					97,165		69,989		8,035					78,024
Segment cost of operations (a)	298,400		55,475					353,875		274,554		45,518					320,072
Segment site rental gross margin	507,072		93,154					600,226		498,275		58,971					557,246
Segment network services and other gross margin	60,679		1,162					61,841		55,021		2,045					57,066
Segment general and administrative expenses (a)	23,760		17,689		39,206			80,655		23,599		15,522		36,071			75,192
Segment operating profit	543,991		76,627		(39,206		)	581,412		529,697		45,494		(36,071		)	539,120
Stock-based compensation expense					24,942			24,942						30,705			30,705
Depreciation, amortization and accretion					288,549			288,549						277,875			277,875
Interest expense and amortization of deferred financing costs					134,487			134,487						126,378			126,378
Other income (expenses) to reconcile to income (loss) before income taxes(b)					9,927			9,927						52,450			52,450
Income (loss) before income taxes								$	123,507								$	51,712
Capital expenditures	$	101,475	$	154,266	$	6,674		$	262,415	$	111,041	$	80,153	$	2,295		$	193,489
Total assets (at period end)	$	18,255,108	$	5,053,536	$	468,198		$	23,776,842	$	18,090,100	$	3,188,474	$	439,677		$	21,718,251

(a) Segment cost of operations exclude (1) stock-based compensation expense of $4.9 million and $8.3 million for the three months ended March 31, 2017 and 2016, respectively, and (2) prepaid lease purchase price adjustments of $5.1 million and $5.2 million for the three months ended March 31, 2017 and 2016, respectively. Segment general and administrative expenses exclude stock-based compensation expense of $20.1 million and $22.4 million for the three months ended March 31, 2017 and 2016, respectively.

(b) See condensed consolidated statement of operations for further information.

13

CROWN CASTLE INTERNATIONAL CORP. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS-Unaudited (Continued)

(Tabular dollars in thousands, except per share amounts)

11. Supplemental Cash Flow Information

	Three Months Ended March 31,
	2017			2016
Supplemental disclosure of cash flow information:
Interest paid	$	144,452		$	111,469
Income taxes paid	796			6,773
Supplemental disclosure of non-cash investing and financing activities:
Increase (decrease) in accounts payable for purchases of property and equipment	(17,876		)	(8,638		)
Purchase of property and equipment under capital leases and installment purchases	9,226			12,269

12. Subsequent Events

Proposed Wilcon Acquisition

On April 17, 2017, the Company announced that it had entered into a definitive agreement to acquire Wilcon Holdings, LLC ("Wilcon") from Pamlico Holdings and other unit holders of Wilcon for approximately $600 million in cash, subject to certain limited adjustments ("Proposed Wilcon Acquisition"). Wilcon is a fiber services provider that owns approximately 1,900 route miles of fiber, primarily in Los Angeles and San Diego. The Company expects to finance the Proposed Wilcon Acquisition using one or more liquidity sources, which may include cash on hand, undrawn availability from the 2016 Revolver, debt financings and issuances of equity or equity related securities. The Company expects the Proposed Wilcon Acquisition to close in the third quarter of 2017.

May 2017 Equity Financing

On May 1, 2017, the Company completed an offering of 4.75 million shares of its common stock, which generated net proceeds of approximately $440 million ("May 2017 Equity Financing"). The Company intends to use the net proceeds of the May 2017 Equity Financing for general corporate purposes, which may include the funding of acquisitions, including the Proposed Wilcon Acquisition, discretionary investments and the repayment or repurchase of outstanding indebtedness.

4.75% Senior Notes

On May 1, 2017, the Company issued $350 million aggregate principal amount of 4.750% senior unsecured notes due May 2047 ("4.75% Senior Notes"). The Company intends to use the net proceeds of the 4.75% Senior Notes offering for general corporate purposes, which may include the funding of acquisitions, including the Proposed Wilcon Acquisition, discretionary investments and the repayment or repurchase of outstanding indebtedness.

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ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

The following discussion should be read in conjunction with the response to Part I, Item 1 of this report and the consolidated financial statements of the Company including the related notes and "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations" ("MD&A")included in our 2016 Form 10-K. Capitalized terms used but not defined in this Item have the same meaning given to them in our 2016 Form 10-K. Unless this Form 10-Q indicates otherwise or the context otherwise requires, the terms "we," "our," "our company," "the company," or "us" as used in this Form 10-Q refer to Crown Castle International Corp., and its predecessor, as applicable, and their subsidiaries.

General Overview

Overview

We own, operate and lease shared wireless infrastructure that has been acquired or constructed over time and is geographically dispersed throughout the U.S., and which consists of approximately (1) 40,000 towers and (2) approximately 27,500 route miles of fiber primarily supporting small cell networks. Our towers have a significant presence in the top 100 BTAs, and the majority of our fiber is located in major metropolitan areas. Site rental revenues represented 84% of our first quarter 2017 consolidated net revenues. Our Towers operating segment and Small Cells operating segment accounted for 84% and 16% of our first quarter 2017 site rental revenues, respectively. See note 10 to our condensed consolidated financial statements. The vast majority of our site rental revenues is of a recurring nature and was contracted for in a prior year.

Strategy

Our strategy is to create long-term stockholder value via a combination of (1) growing cash flows generated from our portfolio of wireless infrastructure, (2) returning a meaningful portion of our cash provided by operating activities to our stockholders in the form of dividends and (3) investing capital efficiently to grow cash flows and long-term dividends per share. We measure our efforts to create "long-term stockholder value" by the combined payment of dividends to stockholders and growth in our per share results. The key elements of our strategy are to:

• Grow cash flows from our wireless infrastructure. We seek to maximize our site rental cash flows by working with our customers to provide them quick access to our wireless infrastructure and entering into associated long-term leases. Tenant additions or modifications of existing tenant equipment (collectively, "tenant additions") enable our customers to expand coverage and capacity in order to meet increasing demand for wireless connectivity, while generating high incremental returns for our business. We believe our product offerings of towers and small cells provide a comprehensive solution to our customers' growing connectivity needs through our shared wireless infrastructure model, which is an efficient and cost effective way to serve our customers. We also believe that there will be considerable future demand for our wireless infrastructure based on the location of our wireless infrastructure and the rapid growth in wireless connectivity, which will lead to future growth in the wireless industry.

• Return cash provided by operating activities to stockholders in the form of dividends. We believe that distributing a meaningful portion of our cash provided by operating activities appropriately provides stockholders with increased certainty for a portion of expected long-term stockholder value while still retaining sufficient flexibility to invest in our business and deliver growth. We believe this decision reflects the translation of the high-quality, long-term contractual cash flows of our business into stable capital returns to stockholders.

• Invest capital efficiently to grow cash flows and long-term dividends per share. We seek to invest our available capital, including the net cash provided by our operating activities and external financing sources, in a manner that will increase long-term stockholder value on a risk-adjusted basis. Our historical investments have included the following (in no particular order):

◦ purchases of shares of our common stock from time to time;

◦ acquisitions or construction of towers, fiber and small cells;

◦ acquisitions of land interests under towers;

◦ improvements and structural enhancements to our existing wireless infrastructure; or

◦ purchases, repayments or redemptions of our debt.

Our strategy to create long-term stockholder value is based on our belief that additional demand for our wireless infrastructure will be created by the expected continued growth in the demand for wireless connectivity. We believe that such demand for our

15

wireless infrastructure will continue, will result in growth of our cash flows due to tenant additions on our existing wireless infrastructure, and will create other growth opportunities for us, such as demand for new wireless infrastructure.

Business Fundamentals and Results

The following are certain highlights of our business fundamentals and results as of and for the three months ended March 31, 2017.

• We operate as a REIT for U.S. federal income tax purposes.

◦ As a REIT, we are generally entitled to a deduction for dividends that we pay and therefore are not subject to U.S. federal corporate income tax on our taxable income that is distributed to our stockholders.

◦ To qualify and be taxed as a REIT, we will generally be required to distribute at least 90% of our REIT taxable income, after the utilization of our NOLs (determined without regard to the dividends paid deduction and excluding net capital gain), each year to our stockholders.

◦ See note 6 to our condensed consolidated financial statements for further discussion of our REIT status.

• Potential growth resulting from wireless network expansion and new entrants

◦ We expect wireless carriers will continue their focus on improving network quality and expanding capacity by utilizing a combination of towers and small cells solutions. We believe our product offerings of Towers and Small Cells provide a comprehensive wireless solution to our customers' growing wireless infrastructure needs.

◦ We expect existing and potential new customer demand for our wireless infrastructure will result from (1) new technologies, (2) increased usage of wireless applications (including mobile entertainment, mobile internet usage, and machine-to-machine applications), (3) adoption of other emerging and embedded wireless devices (including smartphones, laptops, tablets, and other devices), (4) increasing smartphone penetration, (5) wireless carrier focus on expanding both network quality and capacity, including the use of both towers and small cells or (6) the availability of additional spectrum.

◦ Tenant additions are achieved at a low incremental operating cost, delivering high incremental returns.

• Substantially all of our wireless infrastructure can accommodate additional tenancy, either as currently constructed or with appropriate modifications.

◦ U.S. wireless carriers continue to invest in their networks.

• Site rental revenues under long-term tenant leases with contractual escalations

◦ Initial terms of five to 15 years with multiple renewal periods at the option of the tenant of five to ten years each.

◦ Weighted-average remaining term of approximately six years, exclusive of renewals at the tenant's option, currently representing approximately $19 billion of expected future cash inflows.

• Revenues predominately from large wireless carriers

◦ Approximately 86% of our site rental revenues were derived from AT&T, Sprint, T-Mobile, and Verizon Wireless. See also "Item 2. MD&A—General Overview—Outlook Highlights" presented below.

• Majority of land interests under our towers under long-term control

◦ Approximately 90% of our Towers site rental gross margin and more than 75% of our Towers site rental gross margin is derived from towers that reside on land that we own or control for greater than ten and 20 years, respectively. The aforementioned amounts include towers that reside on land interests that are owned, including fee interests and perpetual easements, which represent over one-third of our Towers site rental gross margin.

• Minimal sustaining capital expenditure requirements

◦ Sustaining capital expenditures represented less than 2% of net revenues.

• Debt portfolio with long-dated maturities extended over multiple years, with the majority of such debt having a fixed rate (see "Item 3. Quantitative and Qualitative Disclosures About Market Risk" for a further discussion of our debt)

◦ 79% of our debt is fixed rate.

◦ Our debt service coverage and leverage ratios were comfortably within their respective financial maintenance covenants.

• During 2017, we have completed the following financing transactions. See notes 4 and 12 to our condensed consolidated financial statements and "Item 2. Liquidity and Capital Resources".

◦ In February 2017, we issued the February 2017 Senior Notes and used the net proceeds to repay a portion of the borrowings under the 2016 Revolver.

◦ In February 2017, we entered into an amendment to the Credit Facility to (1) incur additional term loans in an aggregate principal amount of $500 million and (2) extend the maturity of both the 2016 Term Loan A and the 2016 Revolver to January 2022.

◦ In May 2017, we issued the 4.75% Senior Notes.

◦ During May 2017, we completed the May 2017 Equity Financing, which generated net proceeds of approximately $440 million.

16

• Significant cash flows from operations

◦ Net cash provided by operating activities was $446.1 million.

◦ In addition to the positive impact of contractual escalators, we expect to grow our core business of providing access to our wireless infrastructure as a result of future anticipated additional demand for our wireless infrastructure.

• Returning cash flows provided by operations to stockholders in the form of dividends

◦ During the first quarter of 2017, we paid a common stock cash dividend of $0.95 per share, totaling approximately $348.1 million. We currently expect our anticipated quarterly dividends to result in aggregate annualized cash payments of approximately $1.4 billion during the next 12 months, or an annualized amount of $3.80 per share. Over time, we expect to increase our dividend per share generally commensurate with our realized growth in cash flows. Future dividends are subject to the approval of our board of directors.

• Investing capital efficiently to grow long-term dividends per share

◦ Discretionary capital expenditures were $246.4 million, including wireless infrastructure improvements in order to support additional site rentals, construction of wireless infrastructure and land purchases.

◦ See notes 3 and 12 to our condensed consolidated financial statements for a discussion of the FiberNet Acquisition and the Proposed Wilcon Acquisitions, respectively, which we expect to leverage to support the construction of new small cells.

Outlook Highlights

The following are certain highlights of our full year 2017 outlook that impact our business fundamentals described above.

• We expect that our full year 2017 site rental revenue growth will be impacted by (1) a healthy environment for tenant additions, as large wireless carriers upgrade and enhance their networks to meet the increasing need for wireless connectivity, (2) the FiberNet Acquisition (see note 3 to our condensed consolidated financial statements), (3) the Proposed Wilcon Acquisition (see note 12 to our condensed consolidated financial statements), and (4) anticipated non-renewals of tenant leases primarily resulting from our customers' decommissioning of the Acquired Networks.

• We expect capital expenditures for 2017 to equal or exceed levels from 2016 with a continued increase in the construction of new small cells. We also expect sustaining capital expenditures to be approximately 2% of net revenues for full year 2017.

Results of Operations

The following discussion of our results of operations should be read in conjunction with our condensed consolidated financial statements and our 2016 Form 10-K.

The following discussion of our results of operations is based on our condensed consolidated financial statements prepared in accordance with GAAP, which requires us to make estimates and judgments that affect the reported amounts (see "Item 2. MD&A—Accounting and Reporting Matters—Critical Accounting Policies and Estimates" and note 2 to our consolidated financial statements on our 2016 Form 10-K).

Our operating segments consist of (1) Towers and (2) Small Cells. See note 10 to our condensed consolidated financial statements for further discussion of our operating segments.

See "Item 2. MD&A—Accounting and Reporting Matters—Non-GAAP Financial Measures" for a discussion of our use of (1) segment site rental gross margin, (2) segment network services and other gross margin, (3) segment operating profit, including their respective definitions, and (4) Adjusted EBITDA, including its definition, and a reconciliation to net income (loss).

Highlights of the Company's results of operations for the three months ended March 31, 2017 and 2016 are depicted below.

17

($ in thousands)	Three Months Ended March 31,
	2017	2016	$ Change	% Change
Site rental revenues:
Towers site rental revenues	$716,536	$702,840	+$13,696	+2%
Small Cells site rental revenues	$140,400	$96,454	+$43,946	+46%
Total site rental revenues	$856,936	$799,294	+$57,642	+7%
Site rental gross margin:
Towers site rental gross margin(b)	$507,072	$498,275	+$8,797	+2%
Small Cells site rental gross margin(b)	$93,154	$58,971	+$34,183	+58%
Total site rental gross margin	$591,919	$546,673	+$45,246	+8%
Network services and other gross margin:
Towers network services and other gross margin(b)	$60,679	$55,021	+$5,658	+10%
Small Cells network services and other gross margin(b)	$1,162	$2,045	$(883)	(43)%
Total network services and other gross margin	$60,198	$54,119	+$6,079	+11%
Segment operating profit:
Towers operating profit(b)	$543,991	$529,697	+$14,294	+3%
Small Cells operating profit(b)	$76,627	$45,494	+$31,133	+68%
Adjusted EBITDA(a)	$581,412	$539,120	+$42,292	+8%
Net income attributable to CCIC common stockholders	$119,138	$36,843	+$82,295	+223%

(a) See reconciliation of Adjusted EBITDA in "Item 2. MD&A—Accounting and Reporting Matters—Non-GAAP Financial Measures."

(b) See note 10 to our condensed consolidated financial statements for further discussion of our definitions of segment site rental gross margin, segment network services and other gross margin and segment operating profit.

Site rental revenues grew $57.6 million, or 7%, from the three months ended March 31, 2016 to the three months ended March 31, 2017. This growth was predominately comprised of the factors depicted in the chart below:

(a) Includes (1) amortization of up front payments received from long-term tenant contracts and other deferred credits (commonly referred to as prepaid rent) and (2) the construction of small cells.

(b) Represents initial contribution of acquisitions and tower builds until the one-year anniversary of the acquisition or build.

18

Towers site rental revenues for the first quarter of 2017 were $716.5 million and increased by $13.7 million, or 2%, from $702.8 million during the same period in the prior year. The increase in Towers site rental revenues was impacted by the following items, inclusive of straight-line accounting, in no particular order: tenant additions across our entire portfolio, renewals or extensions of tenant leases, escalations, acquisitions (including the TDC Acquisition completed in April 2016), and non-renewals of tenant leases predominately arising from our customers' decommissioning of the Acquired Networks. Tenant additions were influenced by our customers' ongoing efforts to improve network quality and capacity.

Small Cells site rental revenues for the first quarter of 2017 were $140.4 million and increased by $43.9 million, or 46%, from $96.5 million during the same period in the prior year. The increase in Small Cells site rental revenues was predominately (1) impacted by $31.2 million from the FiberNet Acquisition completed in January 2017 and (2) due to the leasing of newly constructed small cells. Demand for small cells was influenced by our customers' growing adoption of small cells as an important component of their network strategy to provide capacity and relieve network congestion.

The increase in Towers site rental gross margins was related to the previously mentioned 2%increase in Towers site rental revenues and relatively fixed costs to operate our towers. The increase in Small Cells site rental gross margins was predominately related to the previously mentioned 46%increase in Small Cells site rental revenues.

Towers network services and other gross margin was $60.7 million for the first quarter of 2017 and increased by $5.7 million, or 10%, from $55.0 million during the same period in the prior year, which is a reflection of (1) the volume of activity from carrier network enhancements and (2) the volume and mix of network services and other work. Our network services and other offerings are of a variable nature as these revenues are not under long-term contracts.

General and administrative expenses for the first quarter of 2017 were $100.7 million and increased by $3.1 million, or approximately 3%, from $97.6 million during the same period in the prior year. General and administrative expenses are inclusive of stock-based compensation charges.The increase in general and administrative expenses was primarily related to the growth in our Small Cells business as a result of activities such as (1) the FiberNet Acquisition and (2) the continued expansion in size of our Small Cell segment.

Towers operating profit for the first quarter of 2017increased by $14.3 million, or 3%, from the same period in the prior year. Towers operating profit was primarily impacted by the growth in our Towers site rental revenues and relatively fixed costs to operate our towers.

Small Cells operating profit for the first quarter of 2017increased by $31.1 million, or 68%, from the same period in the prior year. Small Cells operating profit was positively impacted by the previously mentioned FiberNet Acquisition and due to the leasing of newly constructed small cells.

Adjusted EBITDA increased$42.3 million, or 8%, from the first quarter of 2016 to the first quarter of 2017. Adjusted EBITDA was primarily impacted by the growth in our site rental activities in both Towers and Small Cells, including the FiberNet Acquisition as discussed above.

Depreciation, amortization and accretion was $288.5 million for the first quarter of 2017 and increased by $10.6 million, or 4%, from $277.9 million during the same period in the prior year. This increase predominately resulted from a corresponding increase in our gross property and equipment due to capital expenditures and acquisitions, including the FiberNet Acquisition.

Interest expense and amortization of deferred financing costs were $134.5 million for the first quarter of 2017 and increased by $8.1 million, from $126.4 million during the same period in the prior year. The increase predominately resulted from a corresponding increase in our outstanding indebtedness due to acquisitions, including the FiberNet Acquisition. See note 3 to our condensed consolidated financial statements.

As a result of repaying certain of our debt, in conjunction with our refinancing activities, we incurred losses of $3.5 million for the first quarter of 2017 and $30.6 million for the first quarter of 2016. See our 2016 Form 10-K for further discussion of our first quarter 2016 refinancing activities.

For the first quarter of 2017 and 2016, the effective tax rate differs from the federal statutory rate predominately due to our REIT status, including the dividends paid deduction.  See note 6 to our condensed consolidated financial statements and also note 11 to our consolidated financial statements in our 2016 Form 10-K.

Net income (loss) attributable to CCIC stockholders was income of $119.1 million during the first quarter of 2017 compared to income of $36.8 million during the first quarter of 2016. The increase was predominately related to (1) growth in both our

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Towers and Small Cells, and (2) a decrease in losses on the retirement of long-term obligation of $27.1 million from the first quarter of 2016 to the first quarter of 2017.

Liquidity and Capital Resources

Overview

General. Our core business generates revenues under long-term leases (see "Item 2. MD&A—General Overview—Overview") predominately from the largest U.S. wireless carriers. Our strategy is to create long-term stockholder value via a combination of (1) growing cash flows generated from our portfolio of wireless infrastructure, (2) returning a meaningful portion of our cash provided by operating activities to our stockholders in the form of dividends, and (3) investing capital efficiently to grow cash flows and long-term dividends per share. We measure our efforts to create "long-term stockholder value" by the combined payment of dividends to stockholders and growth in our per share results.

We have engaged and expect to continue to engage in discretionary investments that we believe will maximize long-term stockholder value. Our historical discretionary investments include (in no particular order): purchasing our common stock, acquiring or constructing wireless infrastructure, acquiring land interests under towers, improving and structurally enhancing our existing wireless infrastructure, and purchasing, repaying, or redeeming our debt. We have recently spent and expect to continue to spend a significant percentage of our discretionary investments on the construction of small cell networks. We seek to fund our discretionary investments with both net cash provided by operating activities and cash available from financing capacity, such as the use of our undrawn availability from the 2016 Revolver, debt financings and issuances of equity or equity related securities, including under our ATM Program.

We seek to maintain a capital structure that we believe drives long-term stockholder value and optimizes our weighted-average cost of capital. We target a leverage ratio of approximately four to five times Adjusted EBITDA and interest coverage of approximately three times Adjusted EBITDA, subject to various factors, such as the availability and cost of capital and the potential long-term return on our discretionary investments. We may choose to increase or decrease our leverage or coverage from these targets for various periods of time. 

We operate as a REIT for U.S. federal income tax purposes. We expect to continue to pay minimal cash income taxes as a result of our REIT status and our NOLs. See note 6 to our condensed consolidated financial statements and our 2016 Form 10-K.

Liquidity Position. The following is a summary of our capitalization and liquidity position as of March 31, 2017, after giving effect to the (1) May 2017 Equity Financing and (2) the issuance of the 4.75% Senior Notes. See "Item 3. Quantitative and Qualitative Disclosures About Market Risk" and note 4 to our condensed consolidated financial statements for additional information regarding our debt.

	March 31, 2017
	(In thousands of dollars)
Cash and cash equivalents(a)	$	986,577
Undrawn 2016 Revolver availability(b)	2,156,110
Total debt and other long-term obligations	13,834,135
Total equity	7,803,703

(a) Exclusive of restricted cash.

(b) Availability at any point in time is subject to certain restrictions based on the maintenance of financial covenants contained in the 2016 Credit Facility. See our2016 Form 10-K.

Over the next 12 months:

• Our liquidity sources may include (1) cash on hand, (2) net cash provided by operating activities, (3) undrawn availability from our 2016 Revolver, and (4) issuances of equity pursuant to our ATM Program. Our liquidity uses over the next 12 months are expected to include (1) debt service obligations of $112.9 million (principal payments), (2) common stock dividend payments expected to be at least $3.80 per share, or an aggregate of approximately $1.4 billion, subject to future approval by our board of directors (see "Item 2. MD&A—Business Fundamentals and Results"), and (3) sustaining and discretionary capital expenditures (expected to be equal to or greater than current levels). During the next 12 months, we expect that our liquidity sources should be sufficient to cover our expected uses. As CCIC is a holding company, our cash flow from operations is generated by our operating subsidiaries.

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• We have no scheduled contractual debt maturities other than principal payments on amortizing debt. See "Item 3. Quantitative and Qualitative Disclosures About Market Risk" for a tabular presentation as of March 31, 2017 of our scheduled contractual debt maturities and a discussion of anticipated repayment dates.

Summary Cash Flow Information

	Three Months Ended March 31,
	2017			2016			Change
	(In thousands of dollars)
Net increase (decrease) in cash and cash equivalents provided by (used for) continuing operations:
Operating activities	$	446,092		$	437,656		$	8,436
Investing activities	(1,763,141		)	(207,746		)	(1,555,395		)
Financing activities	954,216			(345,592		)	1,299,808
Net increase (decrease) in cash and cash equivalents from continuing operations	(362,833		)	(115,682		)	(247,151		)
Net increase (decrease) in cash and cash equivalents from discontinued operations	—			113,150			(113,150		)
Effect of exchange rate changes on cash	426			(576		)	1,002
Net increase (decrease) in cash and cash equivalents	$	(362,407	)	$	(3,108	)	$	(359,299	)

Operating Activities

Net cash provided by operating activities from continuing operations for the first three months of 2017 increased 2% compared to the first three months of 2016, as net growth in our business was partially offset by changes in working capital. We expect to grow our net cash provided by operating activities in the future (exclusive of movements in working capital) if we realize expected growth in our core business.

Investing Activities

Net cash used for investing activities for the first three months of 2017 increased $1.6 billion from the first three months of 2016 as a result of the FiberNet Acquisition (see note 3 to our condensed consolidated financial statements for further discussion).

Acquisitions. See note 3 to our condensed consolidated financial statements for a discussion of our FiberNet Acquisition, which closed in January 2017. See note 12 to our condensed consolidated financial statements for a discussion of our Proposed Wilcon Acquisition.

Capital Expenditures

Our capital expenditures are categorized as discretionary or sustaining, as described below.

• Discretionary capital expenditures are made with respect to activities which we believe exhibit sufficient potential to enhance long-term stockholder value. They consist of improvements to existing wireless infrastructure, construction of new wireless infrastructure, and, to a lesser extent, purchases of land assets under towers as we seek to manage our interests in the land beneath our towers. Improvements to existing wireless infrastructure to accommodate new leasing typically vary based on, among other factors: (1) the type of wireless infrastructure, (2) the scope, volume, and mix of work performed on the wireless infrastructure, (3) existing capacity prior to installation, or (4) changes in structural engineering regulations and standards. Construction of new wireless infrastructure is predominately comprised of the design and construction of fiber and small cells. Our decisions regarding capital expenditures are influenced by the availability and cost of capital and expected returns on alternative uses of cash, such as payments of dividends and investments.

• Sustaining capital expenditures consist of (1) corporate-related capital improvements and (2) maintenance on our wireless infrastructure assets that enable our customers' ongoing quiet enjoyment of the wireless infrastructure.

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Capital expenditures for the three months ended March 31, 2017 and 2016 were as follows:

Discretionary capital expenditures were impacted by the construction of small cell networks and lower amounts of improvements to existing towers. See also "Item 2. MD&A—General Overview—Outlook Highlights" for our expectations of surrounding 2017 capital expenditures.

Financing Activities

We seek to allocate cash generated by our operations in a manner that will enhance long-term stockholder value, which may include various financing activities such as (in no particular order) paying dividends on our common stock (currently expected to total an aggregate of approximately$1.4 billion during the next 12 months), purchasing our common stock, or purchasing, repaying, or redeeming our debt.

Net cash provided by financing activities for the first three months of 2017 increased $1.3 billion from the first three months of 2016 as a result of our first quarter 2017 financing activities described below.

Credit Facility. In February 2017, we entered into an amendment to the Credit Facility to (1) incur additional term loans in an aggregate principal amount of $500 million, and (2) extend the maturity of both the 2016 Term Loan A and the 2016 Revolver to 2022. See note 4 to our condensed consolidated financial statements.

The proceeds of our 2016 Revolver may be used for general corporate purposes, which may include the financing of capital expenditures, acquisitions and purchases of our common stock. As of May 2, 2017, there was no outstanding balance and $2.5 billion in undrawn availability under our 2016 Revolver. See also note 4 to our condensed consolidated financial statements.

Incurrence, Purchases, and Repayments of Debt.

In February 2017, we issued $500 million aggregate principal amount of February 2017 Senior Notes with a final maturity date of March 2027. We utilized the proceeds to repay a portion of the borrowings under the 2016 Revolver. See note 4 to our condensed consolidated financial statements.

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In May 2017, we issued $350 million aggregate principal amount of 4.75% Senior Notes due May 2047. We intend to use the proceeds of the 4.75% Senior Notes offering for general corporate purposes, which may include the funding of acquisitions, including the Proposed Wilcon Acquisition, discretionary investments and the repayment or repurchase of outstanding indebtedness. See note 12 to our condensed consolidated financial statements.

Common Stock Activity. As of March 31, 2017 and December 31, 2016, we had 361.4 million and 360.5 million common shares outstanding, respectively. See note 9 to our condensed consolidated financial statements for further discussion of the common stock dividends.

In May 2017, we completed the May 2017 Equity Financing, in which we issued 4.75 million shares of common stock and generated net proceeds of approximately $440 million. We intend to use the proceeds of the May 2017 Equity Financing for general corporate purposes, which may include the funding of acquisitions, including the Proposed Wilcon Acquisition, discretionary investments and the repayment or repurchase of outstanding indebtedness. See note 12 to our condensed consolidated financial statements.

ATM Program. We maintain an ATM stock offering program through which we may, from time to time, issue and sell shares of our common stock having an aggregate cumulative gross sales price of up to $500.0 million to or through sales agents. Sales, if any, under the ATM Program may be made by means of ordinary brokers' transactions on the New York Stock Exchange or otherwise at market prices prevailing at the time of sale, at prices related to prevailing market prices or, subject to our specific instructions, at negotiated prices. We intend to use the net proceeds from any sales under the ATM Program for general corporate purposes, which may include the funding of future acquisitions or investments and the repayment or repurchase of any outstanding indebtedness. During the three months ended March 31, 2017, 0.2 million shares of common stock were sold under the ATM Program generating net proceeds of $22.0 million. As of May 2, 2017, we had approximately $150 million of gross sales of common stock availability remaining on our ATM Program. See note 9 to our condensed consolidated financial statements.

Debt Covenants

The credit agreement governing the 2016 Credit Facility contains financial maintenance covenants. We are currently in compliance with these financial maintenance covenants, and based upon our current expectations, we believe we will continue to comply with our financial maintenance covenants. In addition, certain of our debt agreements also contain restrictive covenants that place restrictions on us and may limit our ability to, among other things, incur additional debt and liens, purchase our securities, make capital expenditures, dispose of assets, undertake transactions with affiliates, make other investments, pay dividends or distribute excess cash flow. See our 2016 Form 10-K for a further discussion of our debt covenants, certain restrictive covenants and factors that are likely to determine our subsidiaries' ability to comply with current and future debt covenants.

Accounting and Reporting Matters

Critical Accounting Policies and Estimates

Our critical accounting policies and estimates are those that we believe (1) are most important to the portrayal of our financial condition and results of operations or (2) require our most difficult, subjective or complex judgments, often as a result of the need to make estimates about the effect of matters that are inherently uncertain. The critical accounting policies and estimates for 2017 are not intended to be a comprehensive list of our accounting policies and estimates. In many cases, the accounting treatment of a particular transaction is specifically prescribed by GAAP. In other cases, management is required to exercise judgment in the application of accounting principles with respect to particular transactions. Our critical accounting policies and estimates as of December 31, 2016 are described in "Item 7. MD&A—Accounting and Reporting Matters" and in note 2 of our consolidated financial statements in our 2016 Form 10-K. The critical accounting policies and estimates for the first three months of 2017 have not changed from the critical accounting policies for the year ended December 31, 2016.

Accounting Pronouncements

Recently Adopted Accounting Pronouncements.

See note 2 to our condensed consolidated financial statements.

Recent Accounting Pronouncements Not Yet Adopted.

See note 2 to our condensed consolidated financial statements.

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Non-GAAP and Segment Financial Measures

In addition to the non-GAAP measures used herein and as discussed in note 10 to our condensed consolidated financial statements, we also provide (1) segment site rental gross margin, (2) segment network services and other gross margin, and (3) segment operating profit, which are key measures used by management to evaluate our operating segments for purposes of making decisions about allocating capital and assessing performance. These segment measures are provided pursuant to GAAP requirements related to segment reporting.

We define segment site rental gross margin as segment site rental revenues less segment site rental cost of operations, which excludes stock-based compensation expense and prepaid lease purchase price adjustments recorded in consolidated cost of operations. We define segment network services and other gross margin as segment network services and other revenues less segment network services and other cost of operations, which excludes stock-based compensation expense recorded in consolidated cost of operations. We define segment operating profit as segment site rental gross margin plus segment network services and other gross margin, less general and administrative expenses attributable to the respective segment.

We use earnings before interest, taxes, depreciation, amortization, and accretion, as adjusted ("Adjusted EBITDA"), which is a non-GAAP measure, as an indicator of consolidated financial performance. Our measure of Adjusted EBITDA may not be comparable to similarly titled measures of other companies, including companies in the wireless infrastructure sector or other REITs, and is not a measure of performance calculated in accordance with GAAP. Adjusted EBITDA should not be considered in isolation or as a substitute for operating income or loss, net income or loss, net cash provided by (used for) operating, investing and financing activities or other income statement or cash flow statement data prepared in accordance with GAAP and should be considered only as a supplement to net income or loss computed in accordance with GAAP as a measure of our performance. There are material limitations to using a measure such as Adjusted EBITDA, including the difficulty associated with comparing results among more than one company, including our competitors, and the inability to analyze certain significant items, including depreciation and interest expense, that directly affect our net income or loss. Management compensates for these limitations by considering the economic effect of the excluded expense items independently as well as in connection with their analysis of net income (loss).

We define Adjusted EBITDA as net income (loss) plus restructuring charges (credits), asset write-down charges, acquisition and integration costs, depreciation, amortization and accretion, amortization of prepaid lease purchase price adjustments, interest expense and amortization of deferred financing costs, gains (losses) on retirement of long-term obligations, net gain (loss) on interest rate swaps, gains (losses) on foreign currency swaps, impairment of available-for-sale securities, interest income, other income (expense), benefit (provision) for income taxes, cumulative effect of a change in accounting principle, income (loss) from discontinued operations and stock-based compensation expense. The reconciliation of Adjusted EBITDA to our net income (loss) is set forth below and excludes items in the Company's Adjusted EBITDA definition which are not applicable to the periods shown.

	Three Months Ended March 31,
	2017			2016
Net income (loss)	$	119,138		$	47,840
Adjustments to increase (decrease) net income (loss):
Asset write-down charges	645			7,959
Acquisition and integration costs	5,650			5,638
Depreciation, amortization and accretion	288,549			277,875
Amortization of prepaid lease purchase price adjustments	5,077			5,204
Interest expense and amortization of deferred financing costs	134,487			126,378
Gains (losses) on retirement of long-term obligations	3,525			30,550
Interest income	(370		)	(174		)
Other income (expense)	(4,600		)	3,273
Benefit (provision) for income taxes	4,369			3,872
Stock-based compensation expense	24,942			30,705
Adjusted EBITDA	$	581,412		$	539,120

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We believe Adjusted EBITDA is useful to investors or other interested parties in evaluating our financial performance because:

• it is the primary measure used by our management (1) to evaluate the economic productivity of our operations and (2) for purposes of making decisions about allocating resources to, and assessing the performance of our operations;

• although specific definitions may vary, it is widely used by investors or other interested parties in evaluation of the wireless infrastructure sector and other REITs to measure financial performance without regard to items such as depreciation, amortization and accretion, which can vary depending upon accounting methods and the book value of assets;

• we believe it helps investors and other interested parties meaningfully evaluate and compare the results of our operations (1) from period to period and (2) to our competitors by removing the impact of our capital structure (primarily interest charges from our outstanding debt) and asset base (primarily depreciation, amortization and accretion) from our financial results; and

• it is similar to the measure of current financial performance generally used in our debt covenant calculations.

Our management uses Adjusted EBITDA:

• as a performance goal in employee annual incentive compensation;

• as a measurement of financial performance because it assists us in comparing our financial performance on a consistent basis as it removes the impact of our capital structure (primarily interest charges from our outstanding debt) and asset base (primarily depreciation, amortization and accretion) from our operating results;

• in presentations to our board of directors to enable it to have the same measurement of financial performance used by management;

• for planning purposes, including preparation of our annual operating budget;

• as a valuation measure in strategic analyses in connection with the purchase and sale of assets;

• in determining self-imposed limits on our debt levels, including the evaluation of our leverage ratio and interest coverage ratio; and

• with respect to compliance with our debt covenants, which require us to maintain certain financial ratios that incorporate concepts such as, or similar to, Adjusted EBITDA.

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ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

The following section updates "Item 7A. Quantitative and Qualitative Disclosures About Market Risk" in our 2016 Form 10-K and should be read in conjunction with that report as well as our condensed consolidated financial statements included in Part 1, Item 1 of this report.

Interest Rate Risk

Our interest rate risk relates primarily to the impact of interest rate movements on the following, after giving effect to the issuance of the 4.75% Senior Notes:

• the potential refinancing of our existing debt ($13.8 billion outstanding at March 31, 2017 and $12.2 billion at December 31, 2016);

• our $2.8 billion and $2.0 billion of floating rate debt at March 31, 2017 and December 31, 2016, respectively, which represented approximately 20% and 16% of our total debt, as of March 31, 2017 and as of December 31, 2016, respectively; and

• potential future borrowings of incremental debt, including borrowings on our 2016 Credit Facility.

Over the next 12 months, we have no debt maturities other than principal payments on amortizing debt. We currently have no interest rate swaps.

Sensitivity Analysis

We manage our exposure to market interest rates on our existing debt by controlling the mix of fixed and floating rate debt. As of March 31, 2017, after giving effect to the issuance of the 4.75% Senior Notes, we had $2.8 billion of floating rate debt, none of which had LIBOR floors. As a result, a hypothetical unfavorable fluctuation in market interest rates on our existing debt of 1/8 of a percent point over a 12 month period would increase our interest expense by approximately $3 million.

Tabular Information

The following table provides information about our market risk related to changes in interest rates. The future principal payments and weighted-average interest rates are presented as of March 31, 2017, after giving effect to the issuance of the 4.75% Senior Notes. These debt maturities reflect contractual maturity dates and do not consider the impact of the principal payments that commence if the applicable debt is not repaid or refinanced on or prior to the anticipated repayment dates on the Tower Revenue Notes (see footnote (c)). The information presented below regarding the variable rate debt is supplementary to our sensitivity analysis regarding the impact of changes in the interest rates. See notes 4 and 5 to our condensed consolidated financial statements and our 2016 Form 10-K for additional information regarding our debt.

	Future Principal Payments and Interest Rates by the Debt Instruments' Contractual Year of Maturity
	2017			2018				2019					2020					2021						Thereafter			Total			Fair Value(a)
	(Dollars in thousands)
Debt:
Fixed rate(c)	$	41,049		$	49,908		$—	$	41,360		$	—	$	29,639		$	—	$	1,576,385		$	—		$	9,413,033		$	11,151,374		$	11,582,775
Average interest rate(b)(c)(d)	4.3		%	4.5		%		4.7		%			4.7		%			6.4		%	—		%	6.4		%	5.9		%
Variable rate(e)	$	46,172		$	61,563			$	123,125				$	123,125				$	246,250		—		%	$	2,181,875		$	2,782,110		$	2,769,874
Average interest rate(b)	2.6		%	3.0		%		3.4		%			3.6		%			3.7		%	—			3.7		%	3.7		%

(a) The fair value of our debt is based on indicative quotes (that is, non-binding quotes) from brokers that require judgment to interpret market information, including implied credit spreads for similar borrowings on recent trades or bid/ask offers. These fair values are not necessarily indicative of the amount which could be realized in a current market exchange.

(b) The average interest rate represents the weighted-average stated coupon rate (see footnotes (c) and (d)).

(c) The impact of principal payments that will commence following the anticipated repayment dates is not considered. The tower revenue notes have a principal amount of $2.3 billion, $300 million, and $700 million, with anticipated repayment dates in 2020, 2022 and 2025, respectively..

(d) If the tower revenue notes are not repaid in full by the applicable anticipated repayment dates, the applicable interest rate increases by approximately 5% per annum and monthly principal payments commence using the Excess Cash Flow (as defined in the indenture governing the applicable tower revenue notes) of the issuers of the tower revenue notes. The tower revenue notes are presented based on their contractual maturity dates ranging from 2040 to 2045 and include the impact of an assumed 5% increase in interest rate that would occur following the anticipated repayment dates but exclude the impact of monthly principal payments that would commence using Excess Cash Flow of the issuers of the tower revenue notes. The full year 2016 Excess Cash Flow of the issuers of the tower revenue notes was approximately $563.8 million. We currently expect to refinance these notes on or prior to the respective anticipated repayment dates.

(e) Predominantly consists of our 2016 Term Loan A maturing in 2022.

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ITEM 4. CONTROLS AND PROCEDURES

Disclosure Controls and Procedures

The Company conducted an evaluation, under the supervision and with the participation of the Company's management, including the Company's Chief Executive Officer and Chief Financial Officer, of the effectiveness of the Company's disclosure controls and procedures as of the end of the period covered by this report. Based on this evaluation, the Chief Executive Officer and Chief Financial Officer concluded that the Company's disclosure controls and procedures were effective in alerting them in a timely manner to material information relating to the Company required to be included in the Company's periodic reports under the Securities Exchange Act of 1934.

Changes in Internal Control Over Financial Reporting

There have been no changes in the Company's internal control over financial reporting during the fiscal quarter covered by this report that have materially affected, or are reasonably likely to materially affect, the Company's internal control over financial reporting.

PART II—OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

See the disclosure in note 8 to our condensed consolidated financial statements set forth in Part I, Item 1 of this Quarterly Report on Form 10-Q, which disclosure is hereby incorporated herein by reference.

ITEM 1A. RISK FACTORS

There are no material changes to the risk factors discussed in "Item 1A—Risk Factors" in our 2016 Form 10-K.

ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

The following table summarizes information with respect to purchase of our equity securities during the first quarter of 2017:

Period	Total Number of Shares Purchased	Average Price Paid per Share		Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs	Maximum Number (or Approximate Dollar Value) of Shares that May Yet Be Purchased Under the Plans or Programs
	(In thousands)
January 1 - January 31, 2017	—	$	—	—	—
February 1 - February 28, 2017	247	89.23		—	—
March 1 - March 31, 2017	—	—		—	—
Total	247	$	—	—	—

We paid $22.0 million in cash to effect these purchases. The shares purchased relate to shares withheld in connection with the payment of withholding taxes upon vesting of restricted stock.

ITEM 6. EXHIBITS

The list of exhibits set forth in the accompanying Exhibit Index is incorporated by reference into this Item 6.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

		CROWN CASTLE INTERNATIONAL CORP.
Date:	May 4, 2017	By:	/s/ Daniel K. Schlanger
			Daniel K. Schlanger
			Senior Vice President and Chief Financial Officer
			(Principal Financial Officer)
Date:	May 4, 2017	By:	/s/  ROBERT S. COLLINS
			Robert S. Collins
			Vice President and Controller
			(Principal Accounting Officer)

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Exhibit Index

Exhibit No.		Description
(a)	3.1	Restated Certificate of Incorporation of Crown Castle International Corp. (including the Certificate of Designations of 4.50% Mandatory Convertible Preferred Stock, Series A, incorporated therein as Exhibit I)
(b)	3.2	Amended and Restated By-Laws of Crown Castle International Corp., dated July 30, 2015
(c)	4.1	Seventh Supplemental Indenture dated February 2, 2017, between Crown Castle International Corp. and The Bank of New York Mellon Trust Company, N.A., as trustee, to the Indenture dated April 15, 2014, between Crown Castle International Corp. and The Bank of New York Mellon Trust Company, N.A., as trustee
(d)	10.1	Amendment No. 1 dated as of February 13, 2017, among Crown Castle International Corp., the lenders and issuing banks party thereto, and JPMorgan Chase Bank, N.A., as administrative agent, to the Credit Agreement dated as of January 21, 2016, by and among Crown Castle International Corp., the lenders and issuing banks from time to time party thereto and JPMorgan Chase Bank, N.A., as administrative agent
(e)	10.2	2017 Executive Management Team Annual Incentive Plan
(e)	10.3	Summary of Non-Employee Director Compensation
*	31.1	Certification of Chief Executive Officer pursuant to Section 302 of Sarbanes-Oxley Act of 2002
*	31.2	Certification of Chief Financial Officer pursuant to Section 302 of Sarbanes-Oxley Act of 2002
*	32.1	Certification of Chief Executive Officer and Chief Financial Officer pursuant to Section 906 of Sarbanes-Oxley Act of 2002
*	101.INS	XBRL Instance Document
*	101.SCH	XBRL Taxonomy Extension Schema Document
*	101.DEF	XBRL Taxonomy Extension Definition Linkbase Document
*	101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document
*	101.LAB	XBRL Taxonomy Extension Label Linkbase Document
*	101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document

* Filed herewith.

(a) Incorporated by reference to the exhibit previously filed by the Registrant on Form 8-K (File No. 001-16441) on December 16, 2014.

(b) Incorporated by reference to the exhibit previously filed by the Registrant on Form 8-K (File No. 001-16441) on August 4, 2015.

(c) Incorporated by reference to the exhibit previously filed by the Registrant on Form 8-K (File No. 001-16441) on February 2, 2017.

(d) Incorporated by reference to the exhibit previously filed by the Registrant on Form 8-K (File No. 001-16441) on February 13, 2017.

(e) Incorporated by reference to the exhibit previously filed by the Registrant on Form 8-K (File No. 001-16441) on February 23, 2017.

29

EX-31.1

Exhibit 31.1

Certification

For the Quarterly Period Ended March 31, 2017

I, Jay A. Brown, certify that:

1. I have reviewed this report on Form 10-Q of Crown Castle International Corp. (“registrant”);

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5. The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date:  May 4, 2017

/s/ Jay A. Brown

Jay A. Brown

President and Chief Executive Officer

EX-31.2

Exhibit 31.2

Certification

For the Quarterly Period Ended March 31, 2017

I, Daniel K. Schlanger, certify that:

1. I have reviewed this report on Form 10-Q of Crown Castle International Corp. (“registrant”);

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5. The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date:  May 4, 2017

/s/ Daniel K. Schlanger

Daniel K. Schlanger

Senior Vice President and Chief Financial Officer

EX-32.1

Exhibit 32.1

Certification Pursuant to

18 U.S.C. Section 1350

As Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

In connection with the Quarterly Report on Form 10-Q of Crown Castle International Corp., a Delaware Corporation (“Company”), for the period ending March 31, 2017 as filed with the Securities and Exchange Commission on the date hereof (“Report”), each of the undersigned officers of the Company hereby certifies pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to the best of such officer's knowledge:

1) the Report complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company as of March 31, 2017 (the last date of the period covered by the Report).

/s/ Jay A. Brown

Jay A. Brown

President and Chief Executive Officer

May 4, 2017

/s/ Daniel K. Schlanger

Daniel K. Schlanger

Senior Vice President and Chief Financial Officer

May 4, 2017

A signed original of this written statement required by Section 906 of the Sarbanes-Oxley Act of 2002 has been provided to Crown Castle International Corp. and will be retained by Crown Castle International Corp. and furnished to the Securities and Exchange Commission or its staff upon request.

XML

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2017	May 02, 2017	Dec. 31, 2016
Entity Information [Line Items]
Common Stock, Shares, Outstanding	361,355,043		360,536,659
Entity Voluntary Filers	No
Entity Registrant Name	CROWN CASTLE INTERNATIONAL CORP
Entity Central Index Key	0001051470
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2017
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		366,108,734
Entity Current Reporting Status	Yes

XML

Condensed Consolidated Balance Sheet - USD ($) $ in Thousands		Mar. 31, 2017	Dec. 31, 2016
ASSETS
Cash and cash equivalents		$ 205,192	$ 567,599
Restricted cash		115,128	124,547
Receivables, net		302,697	373,532
Prepaid expenses		153,337	128,721
Other current assets		140,095	130,362
Total current assets		916,449	1,324,761
Deferred site rental receivables		1,310,233	1,317,658
Property and equipment, net		10,293,693	9,805,315
Goodwill		6,530,001	5,757,676
Other intangible assets, net		3,894,362	3,650,072
Long-term prepaid rent and other assets, net		832,104	819,610
Total assets		23,776,842	22,675,092
LIABILITIES AND EQUITY
Accounts payable		154,753	188,516
Accrued interest		84,218	97,019
Deferred revenues		366,758	353,005
Other accrued liabilities		183,584	221,066
Current maturities of debt and other obligations		112,882	101,749
Total current liabilities		902,195	961,355
Debt and other long-term obligations	[1]	13,380,091	12,069,393
Deferred credits and other liabilities		2,131,076	2,087,229
Total liabilities		16,413,362	15,117,977
Commitments and contingencies
CCIC stockholders' equity:
Common stock		3,614	3,605
Additional paid-in capital		10,968,564	10,938,236
Accumulated other comprehensive income (loss)		(5,713)	(5,888)
Dividends/distributions in excess of earnings		(3,602,985)	(3,378,838)
Total equity		7,363,480	7,557,115
Total liabilities and equity		$ 23,776,842	$ 22,675,092

[1] Balances reflect debt issuance costs as a direct reduction from the respective carrying amounts of debt, with the exception of debt issuance costs associated with the Company's revolving credit facilities. See note 2.

XML

Condensed Consolidated Balance Sheet (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Accumulated depreciation, property and equipment	$ 6,823,519	$ 6,613,219
Preferred Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Preferred Stock, Shares Authorized	0	0
Preferred Stock, Shares Issued	0	0
Preferred Stock, Shares Outstanding	0	0
Preferred Stock, Liquidation Preference, Value	$ 0	$ 0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	600,000,000	600,000,000
Common stock, shares outstanding	361,355,043	360,536,659

XML

Condensed Consolidated Statement of Operations and Comprehensive Income (Loss) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Net revenues:
Site rental		$ 856,936	$ 799,294
Network services and other		159,006	135,090
Net revenues		1,015,942	934,384
Operating expenses:
Site rental	[1]	265,017	252,621
Network services and other	[1]	98,808	80,971
General and administrative		100,724	97,581
Asset write-down charges		645	7,959
Acquisition and integration costs		5,650	5,638
Depreciation, amortization and accretion		288,549	277,875
Total operating expenses		759,393	722,645
Operating income (loss)		256,549	211,739
Nonoperating Income (Expense) [Abstract]
Interest expense and amortization of deferred financing costs		(134,487)	(126,378)
Gains (losses) on retirement of long-term obligations		(3,525)	(30,550)
Interest income		370	174
Other income (expense)		4,600	(3,273)
Income (loss) before income taxes		123,507	51,712
Benefit (provision) for income taxes		(4,369)	(3,872)
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent		119,138	47,840
Net income (loss)		119,138	47,840
Dividends on preferred stock		0	(10,997)
Net income (loss) attributable to CCIC common stockholders		119,138	36,843
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Foreign currency translation adjustments		175	(579)
Total other comprehensive income (loss)		175	(579)
Comprehensive income (loss) attributable to CCIC stockholders		$ 119,313	$ 47,261
Net income (loss) attributable to CCIC common stockholders, per common share:
Basic		$ 0.33	$ 0.11
Diluted		$ 0.33	$ 0.11
Weighted-average common shares outstanding (in thousands):
Basic		360,832	334,155
Diluted		361,727	334,929
Continuing Operations [Member]
Nonoperating Income (Expense) [Abstract]
Net income (loss) attributable to CCIC common stockholders		$ 119,138	$ 36,843

[1] Exclusive of depreciation, amortization and accretion shown separately.

XML

Condensed Consolidated Statement of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash flows from operating activities:
Net income (loss)	$ 119,138	$ 47,840
Adjustments to reconcile net income (loss) to net cash provided by (used for) operating activities:
Depreciation, amortization and accretion	288,549	277,875
Gains (losses) on retirement of long-term obligations	3,525	30,550
Amortization of deferred financing costs and other non-cash interest	2,836	4,211
Stock-based compensation expense	22,226	19,895
Asset write-down charges	645	7,959
Deferred income tax benefit (provision)	149	1,860
Other non-cash adjustments	(4,440)	2,166
Changes in assets and liabilities, excluding the effects of acquisitions:
Increase (decrease) in accrued interest	(12,801)	10,698
Increase (decrease) in accounts payable	(29,849)	(9,417)
Increase (decrease) in deferred revenues, deferred ground lease payables, other accrued liabilities and other liabilities	(18,446)	16,145
Decrease (increase) in receivables	92,102	58,991
Decrease (increase) in prepaid expenses, deferred site rental receivables, long-term prepaid rent, restricted cash and other assets	(17,542)	(31,117)
Net cash provided by (used for) operating activities	446,092	437,656
Cash flows from investing activities:
Payment for acquisitions of businesses, net of cash acquired	(1,497,253)	(22,029)
Capital expenditures	(262,415)	(193,489)
Net receipts from settled swaps	(328)	8,141
Other investing activities, net	(3,145)	(369)
Net cash provided by (used for) investing activities	(1,763,141)	(207,746)
Cash flows from financing activities:
Proceeds from issuance of long-term debt	997,890	3,496,901
Principal payments on long-term debt and other long-term obligations	(28,738)	(14,152)
Purchases and redemptions of long-term debt	0	(2,876,390)
Borrowings under revolving credit facility	1,405,000	2,065,000
Payments under revolving credit facility	(1,070,000)	(2,980,000)
Payments for financing costs	(6,761)	(27,421)
Proceeds from Issuance of Common Stock	21,937	323,798
Purchases of capital stock	(22,005)	(24,354)
Dividends/distributions paid on common stock	(348,146)	(299,090)
Dividends/distributions paid on preferred stock	0	(10,997)
Net (increase) decrease in restricted cash	5,039	1,113
Net cash provided by (used for) financing activities	954,216	(345,592)
Long-term Debt, Maturities, Repayments of Principal in Year Five	1,822,635
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	426	(576)
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	205,192	175,702
Continuing Operations [Member]
Cash flows from financing activities:
Net increase (decrease) in cash and cash equivalents - continuing operations	(362,833)	$ (115,682)
At the Market Program [Member]
Cash flows from financing activities:
Proceeds from Issuance of Common Stock	$ 22,009

XML

Condensed Consolidated Statement of Equity - USD ($)	Total	At the Market Program [Member]	Stockholders' Equity, Total [Member]		Stockholders' Equity, Total [Member] At the Market Program [Member]	Common Stock [Member]	Common Stock [Member] At the Market Program [Member]	Preferred Stock [Member]	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member] At the Market Program [Member]	Accumulated Foreign Currency Adjustment Attributable to Parent [Member]		Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]		Dividends/Distributions in Excess of Earnings [Member]	Noncontrolling Interest [Member]
Balance, shares Period Start at Dec. 31, 2015						333,771,660
Balance, value Period Start at Dec. 31, 2015			$ 7,089,221,000			$ 3,338,000		$ 98,000	$ 9,548,580,000		$ (4,398,000)		$ 0		$ (2,458,397,000)	$ 0
Preferred Stock, Shares Outstanding Period Start at Dec. 31, 2015								9,775,000
Stock-based compensation related activity, net of forfeitures, value			26,875,000			$ 2,000			26,873,000		0		0		0	0
Stock-based compensation related activity, net of forfeitures, shares						243,110
Purchases and retirement of capital stock, value			(24,354,000)			$ (3,000)			(24,351,000)		0		0		0	0
Stock Issued During Period, Shares, New Issues						3,828,064
Stock Issued During Period, Value, New Issues						$ 38,000			323,760,000
Proceeds from Issuance of Common Stock	$ 323,798,000
Purchases and retirement of capital stock, shares						(283,116)
Other comprehensive income (loss)	(579,000)		(579,000)	[1]		$ 0			0		(579,000)	[1]	0	[1]	0	0	[1]
Common stock dividends/distributions			(298,810,000)												(298,810,000)
Preferred stock dividends	(10,997,000)		(10,997,000)												(10,997,000)
Net income (loss)	$ 47,840,000		47,840,000			$ 0			0		0		0		47,840,000	0
Balance, shares Period End at Mar. 31, 2016						337,559,718
Balance, value Period End at Mar. 31, 2016			7,152,994,000			$ 3,375,000		$ 98,000	9,874,862,000		(4,977,000)		0		(2,720,364,000)	0
Preferred Stock, Shares Outstanding Period End at Mar. 31, 2016								9,775,000
Balance, shares Period Start at Dec. 31, 2016	360,536,659					360,536,659
Balance, value Period Start at Dec. 31, 2016	$ 7,557,115,000		7,557,115,000			$ 3,605,000		$ 0	10,938,236,000		(5,888,000)		0		(3,378,838,000)	0
Preferred Stock, Shares Outstanding Period Start at Dec. 31, 2016	0							0
Stock-based compensation related activity, net of forfeitures, value			30,405,000			$ 9,000			30,396,000		0		0		0	0
Stock-based compensation related activity, net of forfeitures, shares						822,692
Purchases and retirement of capital stock, value			(22,005,000)			$ (2,000)			(22,003,000)		0		0		0	0
Stock Issued During Period, Shares, New Issues							242,300
Proceeds from Issuance of Common Stock	$ 21,937,000	$ 22,009,000			$ (21,937,000)		$ (2,000)			$ (21,935,000)
Purchases and retirement of capital stock, shares						(246,608)
Other comprehensive income (loss)	175,000		175,000	[2]		$ 0			0		175,000	[2]	0	[2]	0	0	[2]
Common stock dividends/distributions			(343,285,000)												(343,285,000)
Preferred stock dividends	0
Net income (loss)	$ 119,138,000		119,138,000			$ 0			0		0		0		119,138,000	0
Balance, shares Period End at Mar. 31, 2017	361,355,043					361,355,043
Balance, value Period End at Mar. 31, 2017	$ 7,363,480,000		$ 7,363,480,000			$ 3,614,000		$ 0	$ 10,968,564,000		$ (5,713,000)		$ 0		$ (3,602,985,000)	$ 0
Preferred Stock, Shares Outstanding Period End at Mar. 31, 2017	0							0

[1] See the condensed statement of operations and other comprehensive income (loss) for the components of "other comprehensive income (loss)."

[2] See the condensed statement of operations and other comprehensive income (loss) for the components of "other comprehensive income (loss)."

XML

General

3 Months Ended

Mar. 31, 2017

General

General

General

The information contained in the following notes to the consolidated financial statements is condensed from that which would appear in the annual consolidated financial statements; accordingly, the consolidated financial statements included herein should be reviewed in conjunction with the consolidated financial statements for the fiscal year ended December 31, 2016, and related notes thereto, included in the 2016 Form 10-K filed by Crown Castle International Corp. ("CCIC") with the SEC. References to the "Company" include CCIC and its predecessor, as applicable, and their subsidiaries, unless otherwise indicated or the context indicates otherwise. As used herein, the term "including," and any variation thereof means "including without limitation." The use of the word "or" herein is not exclusive.

The Company owns, operates and leases shared wireless infrastructure that has been acquired or constructed over time and is geographically dispersed throughout the United States and Puerto Rico ("U.S."), including: (1) towers and other structures, such as rooftops (collectively, "towers"), and (2) fiber primarily supporting small cell networks (collectively, "small cells" and, together with towers, "wireless infrastructure").

The Company's core business is providing access, including space or capacity, to its shared wireless infrastructure via long-term contracts in various forms, including licenses, subleases and lease agreements.

The Company's operating segments consist of (1) Towers and (2) Small Cells. See note 10.

As part of the Company's effort to provide comprehensive wireless infrastructure solutions, the Company offers certain network services relating to its wireless infrastructure, consisting of (1) site development services relating to existing or new tenant equipment installations on its wireless infrastructure, including: site acquisition, architectural and engineering, or zoning and permitting and (2) tenant equipment installation or subsequent augmentations.

The Company operates as a REIT for U.S. federal income tax purposes. In addition, the Company has certain taxable REIT subsidiaries ("TRSs"). See note 6.

Approximately 53% of the Company's towers are leased or subleased or operated and managed under master leases, subleases, and other agreements with AT&T, Sprint, and T-Mobile. The Company has the option to purchase these towers at the end of their respective lease terms. The Company has no obligation to exercise such purchase options.

Basis of Presentation

The condensed consolidated financial statements included herein are unaudited; however, they include all adjustments (consisting only of normal recurring adjustments) which, in the opinion of management, are necessary to state fairly the consolidated financial position of the Company at March 31, 2017, and the consolidated results of operations and the consolidated cash flows for the three months ended March 31, 2017 and 2016. The year-end condensed consolidated balance sheet data was derived from audited financial statements, but does not include all disclosures required by GAAP. The results of operations for the interim periods presented are not necessarily indicative of the results to be expected for the full year.

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities as of the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

XML

Summary of Significant Accounting Policies

3 Months Ended

Mar. 31, 2017

Summary of Significant Accounting Policies [Abstract]

Significant Accounting Policies

Summary of Significant Accounting Policies

The significant accounting policies used in the preparation of the Company's condensed consolidated financial statements are disclosed in the 2016 Form 10-K, other than certain recent accounting pronouncements described below.

Recently Adopted Accounting Pronouncements

No accounting pronouncements adopted during the three months ended March 31, 2017 had a material impact on the Company's condensed consolidated financial statements.

Recent Accounting Pronouncements Not Yet Adopted

In February 2017, the FASB issued new guidance which clarifies the scope and application on accounting for the de-recognition of non-financial assets and in substance non-financial assets, including sales and partial sales of real estate assets. The new guidance also eliminates the existing industry specific guidance for partial sales of real estate, and requires full gain recognition upon partial sales of real estate. The guidance is effective for the Company as of January 1, 2018. The guidance may be early adopted, but must be adopted concurrently with the FASB's May 2014 guidance on revenue from contracts with customers. The guidance is required to be applied, at the Company's election, either (1) retrospectively to each prior reporting period presented, or (2) with the cumulative effect being recognized at the date of initial application. The Company does not expect this guidance to have a material impact on its condensed consolidated financial statements.

XML

Acquisitions

3 Months Ended

Mar. 31, 2017

Acquisitions [Abstract]

Mergers, Acquisitions and Dispositions Disclosures [Text Block]

Acquisitions

FiberNet Acquisition

On November 1, 2016, the Company announced a definitive agreement to acquire FPL FiberNet Holdings, LLC and certain other subsidiaries of NextEra Energy, Inc. (collectively, "FiberNet") for approximately $1.5 billion in cash, subject to certain limited adjustments ("FiberNet Acquisition"). FiberNet is a fiber services provider in Florida and Texas that, as of the agreement date, owned or had rights to approximately 11,500 route miles of fiber installed and under construction, inclusive of approximately 6,000 route miles in top metro markets. On January 17, 2017, the Company closed on the FiberNet Acquisition which was financed using proceeds from its November 2016 Equity Financing and borrowings under the 2016 Revolver (see note 4).

The preliminary purchase price allocation for the FiberNet Acquisition is shown below and is based upon a preliminary valuation which is subject to change as the Company obtains additional information with respect to fixed assets, intangible assets and certain liabilities.

Preliminary Purchase Price Allocation
Current Assets	$	56,456
Property and equipment	450,382
Goodwill(a)	766,739
Other intangible assets, net	325,238
Other non-current assets	72
Current liabilities	(34,097		)
Other non-current liabilities	(42,901		)
Net assets acquired(b)	$	1,521,889

(a) The preliminary purchase price allocation for the FiberNet Acquisition resulted in the recognition of goodwill based on:

• the Company's expectation to leverage the FiberNet fiber footprint to support new small cell networks,

• the complementary nature of the FiberNet fiber to the Company's existing fiber assets and its location in top metro markets where the Company expects to see wireless carrier network investments,

• the Company's belief that the acquired fiber assets are well positioned to benefit from the continued growth trends in the wireless industry, and

• other intangibles not qualified for separate recognition, including the assembled workforce.

(b) The vast majority of assets acquired in the FiberNet Acquisition are expected to be included in the Company's REIT and as such, no deferred taxes were recorded in connection with the FiberNet Acquisition.

Net revenues attributable to the FiberNet Acquisition are included in the Company's consolidated statements of operations and comprehensive income (loss) since the date the acquisition was completed. For the three months ended March 31, 2017, the FiberNet Acquisition contributed $31.9 million to consolidated net revenues.

See note 12 for a discussion of the Proposed Wilcon Acquisition (as hereinafter defined).

XML

Debt and Other Obligations

3 Months Ended

Mar. 31, 2017

Debt and Other Obligations [Abstract]

Debt and Other Obligations

Debt and Other Obligations

	Original Issue Date	Contractual Maturity Date (a)		Balance as of March 31, 2017(f)			Balance as of December 31, 2016(f)		Stated Interest Rate as of March 31, 2017(a)
Bank debt - variable rate:
2016 Revolver	Jan. 2016	Jan. 2022	(e)	$	335,000	(b)(d)	$	—	2.4	%
2016 Term Loan A	Jan. 2016	Jan. 2022	(e)	2,441,545		(e)	1,954,173		2.4	%
Total bank debt				2,776,545			1,954,173
Securitized debt - fixed rate:
Secured Notes, Series 2009-1, Class A-1	July 2009	Aug. 2019		46,059			51,416		6.3	%
Secured Notes, Series 2009-1, Class A-2	July 2009	Aug. 2029		69,405			68,737		9.0	%
Tower Revenue Notes, Series 2010-3	Jan. 2010	Jan. 2040	(c)	1,244,704			1,244,237		6.1	%
Tower Revenue Notes, Series 2010-6	Aug. 2010	Aug. 2040	(c)	994,006			993,557		4.9	%
Tower Revenue Notes, Series 2015-1	May 2015	May 2042	(c)	296,733			296,573		3.2	%
Tower Revenue Notes, Series 2015-2	May 2015	May 2045	(c)	691,545			691,285		3.7	%
Total securitized debt				3,342,452			3,345,805
Bonds - fixed rate:
5.250% Senior Notes	Oct. 2012	Jan. 2023		1,637,626			1,637,099		5.3	%
3.849% Secured Notes	Dec. 2012	Apr. 2023		991,625			991,279		3.9	%
4.875% Senior Notes	Apr. 2014	Apr. 2022		840,761			840,322		4.9	%
3.400% Senior Notes	Feb./May 2016	Feb. 2021		849,784			849,698		3.4	%
4.450% Senior Notes	Feb. 2016	Feb. 2026		890,374			890,118		4.5	%
3.700% Senior Notes	May 2016	June 2026		742,112			741,908		3.7	%
2.250% Senior Notes	Sept. 2016	Sept. 2021		694,441			693,893		2.3	%
4.000% Senior Notes	Feb. 2017	Sept. 2027		493,403		(d)	—		4.0	%
Total bonds				7,140,126			6,644,317
Other:
Capital leases and other obligations	Various	Various		233,850			226,847		Various
Total debt and other obligations				13,492,973			12,171,142
Less: current maturities and short-term debt and other current obligations				112,882			101,749
Non-current portion of long-term debt and other long-term obligations				$	13,380,091		$	12,069,393

(a) See the 2016 Form 10-K, including note 8, for additional information regarding the maturity and principal amortization provisions and interest rates relating to the Company's indebtedness.

(b) As of March 31, 2017, the undrawn availability under the 2016 Revolver was $2.2 billion.

(c) If the respective series of such debt is not paid in full on or prior to an applicable date then Excess Cash Flow (as defined in the indenture) of the issuers of such notes will be used to repay principal of the applicable series, and additional interest (of an additional approximately 5% per annum) will accrue on the respective series. See the 2016 Form 10-K for additional information regarding these provisions.

(d) In February 2017 the Company issued $500 million aggregate principal amount of 4.000% senior unsecured notes with a final maturity date of March 2027 ("February 2017 Senior Notes"). The Company used the net proceeds from the February 2017 Senior Notes offering to repay a portion of the borrowings under the 2016 Revolver.

(e) In February 2017, the Company entered into an amendment to the Credit Facility to (1) incur additional term loans in an aggregate principal amount of $500 million, and (2) extend the maturity of both the 2016 Term Loan A and the 2016 Revolver to January 2022.

(f) Balances reflect debt issuance costs as a direct reduction from the respective carrying amounts of debt, with the exception of debt issuance costs associated with the Company's revolving credit facilities. See note 2.

See note 12 for information regarding our May 2017 financing activities.

Contractual Maturities

The following are the scheduled contractual maturities of the total debt and other long-term obligations of the Company outstanding as of March 31, 2017. These maturities reflect contractual maturity dates and do not consider the principal payments that will commence following the anticipated repayment dates on the Tower Revenue Notes.

	Nine Months Ending December 31,		Years Ending December 31,												Unamortized Adjustments, Net			Total Debt and Other Obligations Outstanding
	2017		2018		2019		2020		2021		Thereafter		Total Cash Obligations
Scheduled contractual maturities	$	87,221	$	111,470	$	164,485	$	152,764	$	1,822,635	$	11,244,908	$	13,583,483	$	(90,510	)	$	13,492,973

Interest Expense and Amortization of Deferred Financing Costs

The components of interest expense and amortization of deferred financing costs are as follows:

	Three Months Ended March 31,
	2017			2016
Interest expense on debt obligations	$	131,651		$	122,167
Amortization of deferred financing costs and adjustments on long-term debt	4,551			5,106
Other, net of capitalized interest	(1,715		)	(895		)
Total	$	134,487		$	126,378

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Fair Value Disclosures

3 Months Ended

Mar. 31, 2017

Fair Value Disclosures

Fair Value Disclosures

Fair Value Disclosures

	Level in Fair Value Hierarchy	March 31, 2017				December 31, 2016
		Carrying  Amount		Fair Value		Carrying  Amount		Fair Value
Assets:
Cash and cash equivalents	1	$	205,192	$	205,192	$	567,599	$	567,599
Restricted cash, current and non-current	1	120,128		120,128		129,547		129,547
Liabilities:
Total debt and other obligations	2	13,492,973		14,005,423		12,171,142		12,660,013

The fair value of cash and cash equivalents and restricted cash approximate the carrying value. The Company determines the fair value of its debt securities based on indicative, non-binding quotes from brokers. Quotes from brokers require judgment and are based on the brokers' interpretation of market information, including implied credit spreads for similar borrowings on recent trades or bid/ask prices or quotes from active markets if available. There were no changes since December 31, 2016 in the Company's valuation techniques used to measure fair values.

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Income Taxes

3 Months Ended

Mar. 31, 2017

Income Taxes

Income Taxes

Income Taxes

The Company operates as a REIT for U.S. federal income tax purposes. As a REIT, the Company is generally entitled to a deduction for dividends that it pays and therefore is not subject to U.S. federal corporate income tax on its net taxable income that is currently distributed to its stockholders. The Company also may be subject to certain federal, state, local, and foreign taxes on its income and assets, including (1) alternative minimum taxes, (2) taxes on any undistributed income, (3) taxes related to the TRSs, (4) certain state, local, or foreign income taxes, (5) franchise taxes, (6) property taxes, and (7) transfer taxes. In addition, the Company could in certain circumstances be required to pay an excise or penalty tax, which could be significant in amount, in order to utilize one or more relief provisions under the Internal Revenue Code of 1986, as amended ("Code") to maintain qualification for taxation as a REIT.

The Company's TRS assets and operations will continue to be subject, as applicable, to federal and state corporate income taxes or to foreign taxes in the jurisdictions in which such assets and operations are located. The Company's foreign assets and operations (including its tower operations in Puerto Rico) most likely will be subject to foreign income taxes in the jurisdictions in which such assets and operations are located, regardless of whether they are included in a TRS or not.

For the three months ended March 31, 2017 and 2016, the Company's effective tax rate differed from the federal statutory rate predominately due to the Company's REIT status, including the dividends paid deduction.

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Per Share Information

3 Months Ended

Mar. 31, 2017

Per Share Information

Per Share Information

Per Share Information

Basic net income (loss) attributable to CCIC common stockholders, per common share, excludes dilution and is computed by dividing net income (loss) attributable to CCIC common stockholders by the weighted-average number of common shares outstanding during the period. Diluted net income (loss) attributable to CCIC common stockholders, per common share is computed by dividing net income (loss) attributable to CCIC common stockholders by the weighted-average number of common shares outstanding during the period plus any potential dilutive common share equivalents, including shares issuable (1) upon the vesting of restricted stock awards and restricted stock units as determined under the treasury stock method and (2) upon conversion of the Company's previously outstanding Convertible Preferred Stock, which converted to common stock during the fourth quarter of 2016, as determined under the if-converted method, for the three months ended March 31, 2016.

	Three Months Ended March 31,
	2017		2016
Net income (loss) attributable to CCIC stockholders	$	119,138	$	47,840
Dividends on preferred stock	—		(10,997		)
Net income (loss) attributable to CCIC common stockholders for basic and diluted computations	$	119,138	$	36,843
Weighted-average number of common shares outstanding (in thousands):
Basic weighted-average number of common stock outstanding	360,832		334,155
Effect of assumed dilution from potential common shares relating to restricted stock units and restricted stock awards	895		774
Diluted weighted-average number of common shares outstanding	361,727		334,929
Net income (loss) attributable to CCIC common stockholders, per common share:
Basic	0.33		0.11
Diluted	0.33		0.11

During the three months ended March 31, 2017, the Company granted 1.2 million restricted stock units. For the three months ended March 31, 2016, 11.4 million common share equivalents, respectively, related to the previously outstanding Convertible Preferred Stock were excluded from the dilutive common shares because the impact of such conversion would be anti-dilutive, based on the Company's common stock price as of the end of the respective periods.

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Commitments and Contingencies

3 Months Ended

Mar. 31, 2017

Commitments and Contingencies Disclosure

Commitments and Contingencies

Commitments and Contingencies

The Company is involved in various claims, lawsuits or proceedings arising in the ordinary course of business. While there are uncertainties inherent in the ultimate outcome of such matters and it is impossible to presently determine the ultimate costs or losses that may be incurred, if any, management believes the resolution of such uncertainties and the incurrence of such costs should not have a material adverse effect on the Company's consolidated financial position or results of operations. Additionally, the Company and certain of its subsidiaries are contingently liable for commitments or performance guarantees arising in the ordinary course of business, including certain letters of credit or surety bonds. In addition, the Company has the option to purchase approximately 53% of the Company's towers at the end of their respective lease terms. The Company has no obligation to exercise such purchase options.

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Equity

3 Months Ended

Mar. 31, 2017

Equity [Abstract]

Stockholders' Equity Note Disclosure [Text Block]

Equity

Declaration and Payment of Dividends

During the three months ended March 31, 2017, the following dividend was declared and paid:

Equity Type	Declaration Date	Record Date	Payment Date	Dividends Per Share		Aggregate Payment Amount (In millions)
Common Stock	February 17, 2017	March 17, 2017	March 31, 2017	$	0.95	$	343.3	(a)

(a) Inclusive of dividends accrued for holders of unvested restricted stock units, which are paid at the time the restricted stock units vest.

Purchases of the Company's Common Stock

For the three months ended March 31, 2017, the Company purchased 0.2 million shares of its common stock utilizing $22.0 million in cash. The common stock shares purchased relate to shares withheld in connection with the payment of withholding taxes upon vesting of restricted stock.

"At the Market" Stock Offering Program

The Company maintains an "at the market" stock offering program ("ATM Program") through which it may, from time to time, issue and sell shares of its common stock having an aggregate cumulative gross sales price of up to $500.0 million to or through sales agents. Sales, if any, under the ATM Program may be made by means of ordinary brokers' transactions on the New York Stock Exchange or otherwise at market prices prevailing at the time of sale, at prices related to prevailing market prices or, subject to specific instructions of the Company, at negotiated prices. The Company intends to use the net proceeds from any sales under the ATM Program for general corporate purposes, which may include the funding of future acquisitions or investments and the repayment or repurchase of any outstanding indebtedness. During the three months ended March 31, 2017, 0.2 million shares of common stock were sold under the ATM Program generating net proceeds of $22.0 million after giving effect to sales agent commissions of $0.2 million. As of March 31, 2017, the Company had approximately $150 million of gross sales of common stock availability remaining on the ATM Program.

See note 12 for information regarding our May 2017 financing activities.

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Operating Segments

3 Months Ended

Mar. 31, 2017

Segment Reporting [Abstract]

Segment Reporting Disclosure [Text Block]

Operating Segments

The Company's operating segments are (1) Towers and (2) Small Cells. The Towers segment provides access, including space or capacity, to the Company's approximately 40,000 towers geographically dispersed throughout the U.S. The Towers segment also reflects certain network services relating to the Company's towers, consisting of site development services and installation services. The Small Cells segment provides access, including space or capacity, to the Company's approximately 27,500 route miles of fiber primarily supporting small cell networks. To a lesser extent, the Small Cells segment also offers other fiber based solutions.

The measurement of profit or loss used by the Company's chief operating decision maker to evaluate the results of operations of its operating segments are (1) segment site rental gross margin, (2) segment network services and other gross margin, and (3) segment operating profit. The Company defines segment site rental gross margin as segment site rental revenues less segment site rental cost of operations, which excludes stock-based compensation expense and prepaid lease purchase price adjustments recorded in consolidated cost of operations. The Company defines segment network services and other gross margin as segment network services and other revenues less segment network services and other cost of operations, which excludes stock-based compensation expense recorded in consolidated cost of operations. The Company defines segment operating profit as segment site rental gross margin plus segment network services and other gross margin, less general and administrative expenses attributable to the respective segment.

Costs that are directly attributable to Towers and Small Cells are assigned to those respective segments. The "Other" column (1) represents amounts excluded from specific segments, such as restructuring charges (credits), asset write-down charges, acquisition and integration costs, depreciation, amortization and accretion, amortization of prepaid lease purchase price adjustments, interest expense and amortization of deferred financing costs, gains (losses) on retirement of long-term obligations, net gain (loss) on interest rate swaps, gains (losses) on foreign currency swaps, impairment of available-for-sale securities, interest income, other income (expense), cumulative effect of a change in accounting principle, income (loss) from discontinued operations, and stock-based compensation expense, and (2) reconciles segment operating profit to income (loss) before income taxes, as the amounts are not utilized in assessing each segment’s performance. The "Other" total assets balance includes corporate assets such as cash and cash equivalents which have not been allocated to specific segments. There are no significant revenues resulting from transactions between the Company's operating segments.

	Three Months Ended March 31, 2017									Three Months Ended March 31, 2016
	Towers		Small Cells		Other			Consolidated Total		Towers		Small Cells		Other			Consolidated Total
Segment site rental revenues	$	716,536	$	140,400				$	856,936	$	702,840	$	96,454				$	799,294
Segment network services and other revenues	149,615		9,391					159,006		125,010		10,080					135,090
Segment revenues	866,151		149,791					1,015,942		827,850		106,534					934,384
Segment site rental cost of operations	209,464		47,246					256,710		204,565		37,483					242,048
Segment network services and other cost of operations	88,936		8,229					97,165		69,989		8,035					78,024
Segment cost of operations (a)	298,400		55,475					353,875		274,554		45,518					320,072
Segment site rental gross margin	507,072		93,154					600,226		498,275		58,971					557,246
Segment network services and other gross margin	60,679		1,162					61,841		55,021		2,045					57,066
Segment general and administrative expenses (a)	23,760		17,689		39,206			80,655		23,599		15,522		36,071			75,192
Segment operating profit	543,991		76,627		(39,206		)	581,412		529,697		45,494		(36,071		)	539,120
Stock-based compensation expense					24,942			24,942						30,705			30,705
Depreciation, amortization and accretion					288,549			288,549						277,875			277,875
Interest expense and amortization of deferred financing costs					134,487			134,487						126,378			126,378
Other income (expenses) to reconcile to income (loss) before income taxes(b)					9,927			9,927						52,450			52,450
Income (loss) before income taxes								$	123,507								$	51,712
Capital expenditures	$	101,475	$	154,266	$	6,674		$	262,415	$	111,041	$	80,153	$	2,295		$	193,489
Total assets (at period end)	$	18,255,108	$	5,053,536	$	468,198		$	23,776,842	$	18,090,100	$	3,188,474	$	439,677		$	21,718,251

(a) Segment cost of operations exclude (1) stock-based compensation expense of $4.9 million and $8.3 million for the three months ended March 31, 2017 and 2016, respectively, and (2) prepaid lease purchase price adjustments of $5.1 million and $5.2 million for the three months ended March 31, 2017 and 2016, respectively. Segment general and administrative expenses exclude stock-based compensation expense of $20.1 million and $22.4 million for the three months ended March 31, 2017 and 2016, respectively.

(b) See condensed consolidated statement of operations for further information.

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Supplemental Cash Flow Information

3 Months Ended

Mar. 31, 2017

Supplemental Cash Flow Information [Abstract]

Supplemental Cash Flow Information

Supplemental Cash Flow Information

	Three Months Ended March 31,
	2017			2016
Supplemental disclosure of cash flow information:
Interest paid	$	144,452		$	111,469
Income taxes paid	796			6,773
Supplemental disclosure of non-cash investing and financing activities:
Increase (decrease) in accounts payable for purchases of property and equipment	(17,876		)	(8,638		)
Purchase of property and equipment under capital leases and installment purchases	9,226			12,269

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Subsequent Events Subsequent Events

3 Months Ended

Mar. 31, 2017

Subsequent Events [Abstract]

Subsequent Events [Text Block]

Subsequent Events

Proposed Wilcon Acquisition

On April 17, 2017, the Company announced that it had entered into a definitive agreement to acquire Wilcon Holdings, LLC ("Wilcon") from Pamlico Holdings and other unit holders of Wilcon for approximately $600 million in cash, subject to certain limited adjustments ("Proposed Wilcon Acquisition"). Wilcon is a fiber services provider that owns approximately 1,900 route miles of fiber, primarily in Los Angeles and San Diego. The Company expects to finance the Proposed Wilcon Acquisition using one or more liquidity sources, which may include cash on hand, undrawn availability from the 2016 Revolver, debt financings and issuances of equity or equity related securities. The Company expects the Proposed Wilcon Acquisition to close in the third quarter of 2017.

May 2017 Equity Financing

On May 1, 2017, the Company completed an offering of 4.75 million shares of its common stock, which generated net proceeds of approximately $440 million ("May 2017 Equity Financing"). The Company intends to use the net proceeds of the May 2017 Equity Financing for general corporate purposes, which may include the funding of acquisitions, including the Proposed Wilcon Acquisition, discretionary investments and the repayment or repurchase of outstanding indebtedness.

4.75% Senior Notes

On May 1, 2017, the Company issued $350 million aggregate principal amount of 4.750% senior unsecured notes due May 2047 ("4.75% Senior Notes"). The Company intends to use the net proceeds of the 4.75% Senior Notes offering for general corporate purposes, which may include the funding of acquisitions, including the Proposed Wilcon Acquisition, discretionary investments and the repayment or repurchase of outstanding indebtedness.

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Summary of Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2017

Summary of Significant Accounting Policies [Abstract]

Recent accounting prounouncements

Recently Adopted Accounting Pronouncements

No accounting pronouncements adopted during the three months ended March 31, 2017 had a material impact on the Company's condensed consolidated financial statements.

Recent Accounting Pronouncements Not Yet Adopted

In February 2017, the FASB issued new guidance which clarifies the scope and application on accounting for the de-recognition of non-financial assets and in substance non-financial assets, including sales and partial sales of real estate assets. The new guidance also eliminates the existing industry specific guidance for partial sales of real estate, and requires full gain recognition upon partial sales of real estate. The guidance is effective for the Company as of January 1, 2018. The guidance may be early adopted, but must be adopted concurrently with the FASB's May 2014 guidance on revenue from contracts with customers. The guidance is required to be applied, at the Company's election, either (1) retrospectively to each prior reporting period presented, or (2) with the cumulative effect being recognized at the date of initial application. The Company does not expect this guidance to have a material impact on its condensed consolidated financial statements.

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Acquisitions Purchase Price Allocation (Tables)

3 Months Ended

Mar. 31, 2017

Business Acquisition [Line Items]

Schedule of Business Acquisitions, by Acquisition [Table Text Block]

The preliminary purchase price allocation for the FiberNet Acquisition is shown below and is based upon a preliminary valuation which is subject to change as the Company obtains additional information with respect to fixed assets, intangible assets and certain liabilities.

Preliminary Purchase Price Allocation
Current Assets	$	56,456
Property and equipment	450,382
Goodwill(a)	766,739
Other intangible assets, net	325,238
Other non-current assets	72
Current liabilities	(34,097		)
Other non-current liabilities	(42,901		)
Net assets acquired(b)	$	1,521,889

(a) The preliminary purchase price allocation for the FiberNet Acquisition resulted in the recognition of goodwill based on:

• the Company's expectation to leverage the FiberNet fiber footprint to support new small cell networks,

• the complementary nature of the FiberNet fiber to the Company's existing fiber assets and its location in top metro markets where the Company expects to see wireless carrier network investments,

• the Company's belief that the acquired fiber assets are well positioned to benefit from the continued growth trends in the wireless industry, and

• other intangibles not qualified for separate recognition, including the assembled workforce.

(b) The vast majority of assets acquired in the FiberNet Acquisition are expected to be included in the Company's REIT and as such, no deferred taxes were recorded in connection with the FiberNet Acquisition.

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Debt and Other Obligations (Tables)

3 Months Ended

Mar. 31, 2017

Debt and Other Obligations [Abstract]

Schedule of Long-Term Debt Instruments

	Original Issue Date	Contractual Maturity Date (a)		Balance as of March 31, 2017(f)			Balance as of December 31, 2016(f)		Stated Interest Rate as of March 31, 2017(a)
Bank debt - variable rate:
2016 Revolver	Jan. 2016	Jan. 2022	(e)	$	335,000	(b)(d)	$	—	2.4	%
2016 Term Loan A	Jan. 2016	Jan. 2022	(e)	2,441,545		(e)	1,954,173		2.4	%
Total bank debt				2,776,545			1,954,173
Securitized debt - fixed rate:
Secured Notes, Series 2009-1, Class A-1	July 2009	Aug. 2019		46,059			51,416		6.3	%
Secured Notes, Series 2009-1, Class A-2	July 2009	Aug. 2029		69,405			68,737		9.0	%
Tower Revenue Notes, Series 2010-3	Jan. 2010	Jan. 2040	(c)	1,244,704			1,244,237		6.1	%
Tower Revenue Notes, Series 2010-6	Aug. 2010	Aug. 2040	(c)	994,006			993,557		4.9	%
Tower Revenue Notes, Series 2015-1	May 2015	May 2042	(c)	296,733			296,573		3.2	%
Tower Revenue Notes, Series 2015-2	May 2015	May 2045	(c)	691,545			691,285		3.7	%
Total securitized debt				3,342,452			3,345,805
Bonds - fixed rate:
5.250% Senior Notes	Oct. 2012	Jan. 2023		1,637,626			1,637,099		5.3	%
3.849% Secured Notes	Dec. 2012	Apr. 2023		991,625			991,279		3.9	%
4.875% Senior Notes	Apr. 2014	Apr. 2022		840,761			840,322		4.9	%
3.400% Senior Notes	Feb./May 2016	Feb. 2021		849,784			849,698		3.4	%
4.450% Senior Notes	Feb. 2016	Feb. 2026		890,374			890,118		4.5	%
3.700% Senior Notes	May 2016	June 2026		742,112			741,908		3.7	%
2.250% Senior Notes	Sept. 2016	Sept. 2021		694,441			693,893		2.3	%
4.000% Senior Notes	Feb. 2017	Sept. 2027		493,403		(d)	—		4.0	%
Total bonds				7,140,126			6,644,317
Other:
Capital leases and other obligations	Various	Various		233,850			226,847		Various
Total debt and other obligations				13,492,973			12,171,142
Less: current maturities and short-term debt and other current obligations				112,882			101,749
Non-current portion of long-term debt and other long-term obligations				$	13,380,091		$	12,069,393

(a) See the 2016 Form 10-K, including note 8, for additional information regarding the maturity and principal amortization provisions and interest rates relating to the Company's indebtedness.

(b) As of March 31, 2017, the undrawn availability under the 2016 Revolver was $2.2 billion.

(c) If the respective series of such debt is not paid in full on or prior to an applicable date then Excess Cash Flow (as defined in the indenture) of the issuers of such notes will be used to repay principal of the applicable series, and additional interest (of an additional approximately 5% per annum) will accrue on the respective series. See the 2016 Form 10-K for additional information regarding these provisions.

(d) In February 2017 the Company issued $500 million aggregate principal amount of 4.000% senior unsecured notes with a final maturity date of March 2027 ("February 2017 Senior Notes"). The Company used the net proceeds from the February 2017 Senior Notes offering to repay a portion of the borrowings under the 2016 Revolver.

(e) In February 2017, the Company entered into an amendment to the Credit Facility to (1) incur additional term loans in an aggregate principal amount of $500 million, and (2) extend the maturity of both the 2016 Term Loan A and the 2016 Revolver to January 2022.

(f) Balances reflect debt issuance costs as a direct reduction from the respective carrying amounts of debt, with the exception of debt issuance costs associated with the Company's revolving credit facilities. See note 2.

See note 12 for information regarding our May 2017 financing activities.

Schedule of Maturities of Long-term Debt

Contractual Maturities

The following are the scheduled contractual maturities of the total debt and other long-term obligations of the Company outstanding as of March 31, 2017. These maturities reflect contractual maturity dates and do not consider the principal payments that will commence following the anticipated repayment dates on the Tower Revenue Notes.

	Nine Months Ending December 31,		Years Ending December 31,												Unamortized Adjustments, Net			Total Debt and Other Obligations Outstanding
	2017		2018		2019		2020		2021		Thereafter		Total Cash Obligations
Scheduled contractual maturities	$	87,221	$	111,470	$	164,485	$	152,764	$	1,822,635	$	11,244,908	$	13,583,483	$	(90,510	)	$	13,492,973

Components of Interest Expense and Amortization of Deferred Financing Costs

Interest Expense and Amortization of Deferred Financing Costs

The components of interest expense and amortization of deferred financing costs are as follows:

	Three Months Ended March 31,
	2017			2016
Interest expense on debt obligations	$	131,651		$	122,167
Amortization of deferred financing costs and adjustments on long-term debt	4,551			5,106
Other, net of capitalized interest	(1,715		)	(895		)
Total	$	134,487		$	126,378

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Fair Value Disclosures (Tables)

3 Months Ended

Mar. 31, 2017

Fair Value Disclosures

Estimated Fair Values and Carrying Amounts of Assets and Liabilities

	Level in Fair Value Hierarchy	March 31, 2017				December 31, 2016
		Carrying  Amount		Fair Value		Carrying  Amount		Fair Value
Assets:
Cash and cash equivalents	1	$	205,192	$	205,192	$	567,599	$	567,599
Restricted cash, current and non-current	1	120,128		120,128		129,547		129,547
Liabilities:
Total debt and other obligations	2	13,492,973		14,005,423		12,171,142		12,660,013

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Per Share Information (Tables)

3 Months Ended

Mar. 31, 2017

Per Share Information

Reconciliation of the Numerators and Denominators of the Basic and Diluted Per Share Computations

	Three Months Ended March 31,
	2017		2016
Net income (loss) attributable to CCIC stockholders	$	119,138	$	47,840
Dividends on preferred stock	—		(10,997		)
Net income (loss) attributable to CCIC common stockholders for basic and diluted computations	$	119,138	$	36,843
Weighted-average number of common shares outstanding (in thousands):
Basic weighted-average number of common stock outstanding	360,832		334,155
Effect of assumed dilution from potential common shares relating to restricted stock units and restricted stock awards	895		774
Diluted weighted-average number of common shares outstanding	361,727		334,929
Net income (loss) attributable to CCIC common stockholders, per common share:
Basic	0.33		0.11
Diluted	0.33		0.11

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Equity (Tables)

3 Months Ended

Mar. 31, 2017

Dividends Payable [Line Items]

Dividends Declared [Table Text Block]

Declaration and Payment of Dividends

During the three months ended March 31, 2017, the following dividend was declared and paid:

Equity Type	Declaration Date	Record Date	Payment Date	Dividends Per Share		Aggregate Payment Amount (In millions)
Common Stock	February 17, 2017	March 17, 2017	March 31, 2017	$	0.95	$	343.3	(a)

(a) Inclusive of dividends accrued for holders of unvested restricted stock units, which are paid at the time the restricted stock units vest.

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Operating Segments Operating Segments (Tables)

3 Months Ended

Mar. 31, 2017

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment [Table Text Block]

	Three Months Ended March 31, 2017									Three Months Ended March 31, 2016
	Towers		Small Cells		Other			Consolidated Total		Towers		Small Cells		Other			Consolidated Total
Segment site rental revenues	$	716,536	$	140,400				$	856,936	$	702,840	$	96,454				$	799,294
Segment network services and other revenues	149,615		9,391					159,006		125,010		10,080					135,090
Segment revenues	866,151		149,791					1,015,942		827,850		106,534					934,384
Segment site rental cost of operations	209,464		47,246					256,710		204,565		37,483					242,048
Segment network services and other cost of operations	88,936		8,229					97,165		69,989		8,035					78,024
Segment cost of operations (a)	298,400		55,475					353,875		274,554		45,518					320,072
Segment site rental gross margin	507,072		93,154					600,226		498,275		58,971					557,246
Segment network services and other gross margin	60,679		1,162					61,841		55,021		2,045					57,066
Segment general and administrative expenses (a)	23,760		17,689		39,206			80,655		23,599		15,522		36,071			75,192
Segment operating profit	543,991		76,627		(39,206		)	581,412		529,697		45,494		(36,071		)	539,120
Stock-based compensation expense					24,942			24,942						30,705			30,705
Depreciation, amortization and accretion					288,549			288,549						277,875			277,875
Interest expense and amortization of deferred financing costs					134,487			134,487						126,378			126,378
Other income (expenses) to reconcile to income (loss) before income taxes(b)					9,927			9,927						52,450			52,450
Income (loss) before income taxes								$	123,507								$	51,712
Capital expenditures	$	101,475	$	154,266	$	6,674		$	262,415	$	111,041	$	80,153	$	2,295		$	193,489
Total assets (at period end)	$	18,255,108	$	5,053,536	$	468,198		$	23,776,842	$	18,090,100	$	3,188,474	$	439,677		$	21,718,251

(a) Segment cost of operations exclude (1) stock-based compensation expense of $4.9 million and $8.3 million for the three months ended March 31, 2017 and 2016, respectively, and (2) prepaid lease purchase price adjustments of $5.1 million and $5.2 million for the three months ended March 31, 2017 and 2016, respectively. Segment general and administrative expenses exclude stock-based compensation expense of $20.1 million and $22.4 million for the three months ended March 31, 2017 and 2016, respectively.

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Supplemental Cash Flow Information (Tables)

3 Months Ended

Mar. 31, 2017

Supplemental Cash Flow Information [Abstract]

Supplemental Disclosure of Cash Flow Information and Non-cash Investing and Financing Activities

	Three Months Ended March 31,
	2017			2016
Supplemental disclosure of cash flow information:
Interest paid	$	144,452		$	111,469
Income taxes paid	796			6,773
Supplemental disclosure of non-cash investing and financing activities:
Increase (decrease) in accounts payable for purchases of property and equipment	(17,876		)	(8,638		)
Purchase of property and equipment under capital leases and installment purchases	9,226			12,269

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General Business (Details)	Mar. 31, 2017
Subject to Capital Lease with Sprint, TMO, or AT&T [Member]
Purchase Option, Percentage of Towers	53.00%

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Acquisitions (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($)
Business Acquisition [Line Items]
Tower Count	40,000
FiberNet Acquisition [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets	$ 56,456
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual	31,900
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets	325,238
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets	72
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	450,382
Business Acquisition, Goodwill	$ 766,739	[1]
Fiber Miles Acquired	11,500
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities	$ (34,097)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities	(42,901)
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	$ 1,521,889	[2]
Top Metro Markets [Domain] | FiberNet Acquisition [Member]
Business Acquisition [Line Items]
Fiber Miles Acquired	6,000
FiberNet Acquisition [Member]
Business Acquisition [Line Items]
Business Combination, Consideration Transferred	$ 1,500,000
Business Acquisition, Date of Acquisition Agreement	Jan. 17, 2017

[1] (a)The preliminary purchase price allocation for the FiberNet Acquisition resulted in the recognition of goodwill based on:•the Company's expectation to leverage the FiberNet fiber footprint to support new small cell networks,•the complementary nature of the FiberNet fiber to the Company's existing fiber assets and its location in top metro markets where the Company expects to see wireless carrier network investments,•the Company's belief that the acquired fiber assets are well positioned to benefit from the continued growth trends in the wireless industry, and•other intangibles not qualified for separate recognition, including the assembled workforce.

[2] (b)The vast majority of assets acquired in the FiberNet Acquisition are expected to be included in the Company's REIT and as such, no deferred taxes were recorded in connection with the FiberNet Acquisition.

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Debt and Other Obligations (Indebtedness) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2017		Dec. 31, 2016
Debt Instrument [Line Items]
Credit Facility Amendment, Additional Principal		$ 500,000
Credit Facility Amendment, Date		Feb. 13, 2017
Debt and Capital Lease Obligations	[1]	$ 13,492,973		$ 12,171,142
Less: current maturities and short-term debt and other current obligations		112,882		101,749
Non-current portion of long-term debt and other long-term obligations	[1]	$ 13,380,091		12,069,393
Capital Lease Obligations and Other [Member]
Debt Instrument [Line Items]
Contractual maturity date	[2]	Various
Original Debt Issuance Date		Various
Percentage of debt instrument interest rate stated	[2]	Various
Debt and Capital Lease Obligations	[1]	$ 233,850		226,847
Fixed Rate Securitized Debt 2010 Tower Revenue Notes [Member]
Debt Instrument [Line Items]
Debt Instrument Additional Interest Rate Margin		5.00%
2012 Credit Facility [Member] | Variable Rate Revolver 2016 [Member] | CCOC [Member]
Debt Instrument [Line Items]
Debt Instrument, Unused Borrowing Capacity, Amount		$ 2,200,000
Bank Debt [Member]
Debt Instrument [Line Items]
Debt and Capital Lease Obligations	[1]	$ 2,776,545		1,954,173
Bank Debt [Member] | Variable Rate Revolver 2016 [Member]
Debt Instrument [Line Items]
Original issue date		Jan. 01, 2016
Debt Instrument, Maturity Date	[2],[3]	Jan. 21, 2022
Debt Instrument, Interest Rate, Stated Percentage	[2]	2.40%
Debt and Capital Lease Obligations	[1]	$ 335,000	[4],[5]	0
Bank Debt [Member] | Variable Rate 2016 Term Loan A [Member]
Debt Instrument [Line Items]
Original issue date		Jan. 01, 2016
Debt Instrument, Maturity Date	[2],[3]	Jan. 21, 2022
Debt Instrument, Interest Rate, Stated Percentage	[2]	2.40%
Debt and Capital Lease Obligations	[1]	$ 2,441,545	[3]	1,954,173
Securitized Debt [Member]
Debt Instrument [Line Items]
Debt and Capital Lease Obligations	[1]	$ 3,342,452		3,345,805
Securitized Debt [Member] | Fixed Rate Debt 2009 Securitized Notes First Tranche [Member]
Debt Instrument [Line Items]
Original issue date		Jul. 01, 2009
Debt Instrument, Maturity Date	[2]	Aug. 01, 2019
Debt Instrument, Interest Rate, Stated Percentage	[2]	6.30%
Debt and Capital Lease Obligations	[1]	$ 46,059		51,416
Securitized Debt [Member] | Fixed Rate Securitized Debt January 2010 Tower Revenue Notes Third Tranche [Member]
Debt Instrument [Line Items]
Original issue date		Jan. 01, 2010
Debt Instrument, Maturity Date	[2],[6]	Jan. 01, 2040
Debt Instrument, Interest Rate, Stated Percentage	[2]	6.10%
Debt and Capital Lease Obligations	[1]	$ 1,244,704		1,244,237
Securitized Debt [Member] | Fixed Rate Securitized Debt August 2010 Tower Revenue Notes Third Tranche [Member]
Debt Instrument [Line Items]
Original issue date		Aug. 01, 2010
Debt Instrument, Maturity Date	[2],[6]	Aug. 01, 2040
Debt Instrument, Interest Rate, Stated Percentage	[2]	4.90%
Debt and Capital Lease Obligations	[1]	$ 994,006		993,557
Securitized Debt [Member] | Fixed Rate Debt 2009 Securitized Notes Second Tranche [Member]
Debt Instrument [Line Items]
Original issue date		Jul. 01, 2009
Debt Instrument, Maturity Date	[2]	Aug. 01, 2029
Debt Instrument, Interest Rate, Stated Percentage	[2]	9.00%
Debt and Capital Lease Obligations	[1]	$ 69,405		68,737
Securitized Debt [Member] | 2015 Tower Revenue Notes 3.222% due 2042 [Member]
Debt Instrument [Line Items]
Original issue date		May 01, 2015
Debt Instrument, Maturity Date	[2],[6]	May 01, 2042
Debt Instrument, Interest Rate, Stated Percentage	[2]	3.20%
Debt and Capital Lease Obligations	[1]	$ 296,733		296,573
Securitized Debt [Member] | 2015 Tower Revenue Notes 3.663% due 2045 [Member]
Debt Instrument [Line Items]
Original issue date		May 01, 2015
Debt Instrument, Maturity Date	[2],[6]	May 01, 2045
Debt Instrument, Interest Rate, Stated Percentage	[2]	3.70%
Debt and Capital Lease Obligations	[1]	$ 691,545		691,285
High Yield Bonds [Member]
Debt Instrument [Line Items]
Debt and Capital Lease Obligations	[1]	$ 7,140,126		6,644,317
High Yield Bonds [Member] | September 2016 Senior Unsecured Notes [Member]
Debt Instrument [Line Items]
Original issue date		Sep. 01, 2016
Debt Instrument, Maturity Date	[2]	Sep. 01, 2021
Debt Instrument, Interest Rate, Stated Percentage	[2]	2.25%
Debt and Capital Lease Obligations	[1]	$ 694,441		693,893
High Yield Bonds [Member] | February 2017 Senior Unsecured Notes [Member]
Debt Instrument [Line Items]
Original issue date		Feb. 01, 2017
Debt Instrument, Maturity Date	[2]	Mar. 01, 2027
Debt Instrument, Interest Rate, Stated Percentage	[2]	4.00%
Debt and Capital Lease Obligations	[1]	$ 493,403	[5]	0
High Yield Bonds [Member] | Five and One Fourth Senior Notes [Member]
Debt Instrument [Line Items]
Original issue date		Oct. 01, 2012
Debt Instrument, Maturity Date	[2]	Jan. 15, 2023
Debt Instrument, Interest Rate, Stated Percentage	[2]	5.25%
Debt and Capital Lease Obligations	[1]	$ 1,637,626		1,637,099
High Yield Bonds [Member] | 2012 secured notes tranche B [Member]
Debt Instrument [Line Items]
Original issue date		Dec. 01, 2012
Debt Instrument, Maturity Date	[2]	Apr. 15, 2023
Debt Instrument, Interest Rate, Stated Percentage	[2]	3.90%
Debt and Capital Lease Obligations	[1]	$ 991,625		991,279
High Yield Bonds [Member] | 4.875% Senior Notes [Member]
Debt Instrument [Line Items]
Original issue date		Apr. 01, 2014
Debt Instrument, Maturity Date	[2]	Apr. 01, 2022
Debt Instrument, Interest Rate, Stated Percentage	[2]	4.875%
Debt and Capital Lease Obligations	[1]	$ 840,761		840,322
High Yield Bonds [Member] | Senior Unsecured 2016 Notes 3.40% [Member]
Debt Instrument [Line Items]
Original issue date		Feb. 01, 2016
Debt Instrument, Maturity Date	[2]	Feb. 15, 2021
Debt Instrument, Interest Rate, Stated Percentage	[2]	3.40%
Debt and Capital Lease Obligations	[1]	$ 849,784		849,698
High Yield Bonds [Member] | Senior Unsecured 2016 Notes 3.7% [Member]
Debt Instrument [Line Items]
Original issue date		May 01, 2016
Debt Instrument, Maturity Date	[2]	Jun. 15, 2026
Debt Instrument, Interest Rate, Stated Percentage	[2]	3.70%
Debt and Capital Lease Obligations	[1]	$ 742,112		741,908
High Yield Bonds [Member] | Senior Unsecured 2016 Notes 4.450% [Member]
Debt Instrument [Line Items]
Original issue date		Feb. 01, 2016
Debt Instrument, Maturity Date	[2]	Feb. 15, 2026
Debt Instrument, Interest Rate, Stated Percentage	[2]	4.50%
Debt and Capital Lease Obligations	[1]	$ 890,374		$ 890,118
Issuance of debt obligation [Member] | 4.000% Senior Unsecured Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 500,000
Original issue date		Feb. 02, 2017
Debt Instrument, Maturity Date		Mar. 01, 2027
Debt Instrument, Interest Rate, Stated Percentage		4.00%
Issuance of debt obligation [Member] | 2016 Term Loan A [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date		Jan. 01, 2022

[1] Balances reflect debt issuance costs as a direct reduction from the respective carrying amounts of debt, with the exception of debt issuance costs associated with the Company's revolving credit facilities. See note 2.

[2] See the 2016 Form 10-K, including note 8, for additional information regarding the maturity and principal amortization provisions and interest rates relating to the Company's indebtedness.

[3] In February 2017, the Company entered into an amendment to the Credit Facility to (1) incur additional term loans in an aggregate principal amount of $500 million, and (2) extend the maturity of both the 2016 Term Loan A and the 2016 Revolver to January 2022.

[4] As of March 31, 2017, the undrawn availability under the 2016 Revolver was $2.2 billion.

[5] In February 2017 the Company issued $500 million aggregate principal amount of 4.000% senior unsecured notes with a final maturity date of March 2027 ("February 2017 Senior Notes"). The Company used the net proceeds from the February 2017 Senior Notes offering to repay a portion of the borrowings under the 2016 Revolver.

[6] If the respective series of such debt is not paid in full on or prior to an applicable date then Excess Cash Flow (as defined in the indenture) of the issuers of such notes will be used to repay principal of the applicable series, and additional interest (of an additional approximately 5% per annum) will accrue on the respective series. See the 2016 Form 10-K for additional information regarding these provisions.

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Debt and Other Obligations (Components of Interest Expense and Amortization of Deferred Financing Costs) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Debt and Other Obligations [Abstract]
Interest expense on debt obligations	$ 131,651	$ 122,167
Amortization of deferred financing costs and adjustments on long-term debt	4,551	5,106
Other	(1,715)	(895)
Total	$ 134,487	$ 126,378

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Debt and Other Obligations Contractual Maturities (Details) - USD ($) $ in Thousands		Mar. 31, 2017	Dec. 31, 2016
Contractual Maturities [Abstract]
Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year		$ 87,221
Long-term Debt, Maturities, Repayments of Principal in Year Two		111,470
Long-term Debt, Maturities, Repayments of Principal in Year Three		164,485
Long-term Debt, Maturities, Repayments of Principal in Year Four		152,764
Long-term Debt, Maturities, Repayments of Principal in Year Five		1,822,635
Long-term Debt, Maturities, Repayments of Principal after Year Five		11,244,908
Debt Instrument, Unamortized Adjustments		90,510
Debt and Capital Lease Obligations	[1]	13,492,973	$ 12,171,142
Long-term Debt, Gross		$ 13,583,483

[1] Balances reflect debt issuance costs as a direct reduction from the respective carrying amounts of debt, with the exception of debt issuance costs associated with the Company's revolving credit facilities. See note 2.

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Fair Value Disclosures (Estimated Fair Values and Carrying Amounts of Assets and Liabilities) (Details) - USD ($)		Mar. 31, 2017	Dec. 31, 2016
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents, carrying value		$ 205,192,000	$ 567,599,000
Cash and cash equivalents, fair value		205,192,000	567,599,000
Restricted cash, current and non-current, carrying value		120,128,000	129,547,000
Restricted cash, current and non-current, fair value		120,128,000	129,547,000
Long-term debt and other obligations, carrying amount	[1]	13,492,973,000	12,171,142,000
Long-term debt and other obligations, fair value		14,005,423,000	$ 12,660,013,000
Cash and Cash Equivalents [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents, carrying value		1
Restricted cash, current and non-current, carrying value		1
Long-term Debt [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt and other obligations, carrying amount		$ 2

[1] Balances reflect debt issuance costs as a direct reduction from the respective carrying amounts of debt, with the exception of debt issuance costs associated with the Company's revolving credit facilities. See note 2.

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Per Share Information (Reconciliation of the Numerators and Denominators of the Basic and Diluted Per Share Computations) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Per Share Information
Net income (Loss) from Continuing Operations Attributable to Parent	$ 119,138	$ 47,840
Dividends on preferred stock	0	10,997
Net income (loss) attributable to CCIC common stockholders for basic and diluted computations	$ 119,138	$ 36,843
Basic weighted-average number of common stock outstanding	360,832,000	334,155,000
Effect of assumed dilution from potential common shares relating to restricted stock units and restricted stock awards	895,000	774,000
Diluted weighted-average number of common shares outstanding	361,727,000	334,929,000
Basic	$ 0.33	$ 0.11
Diluted	$ 0.33	$ 0.11
Continuing Operations [Member]
Per Share Information
Net income (loss) attributable to CCIC common stockholders for basic and diluted computations	$ 119,138	$ 36,843

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Per Share Information (Narrative) (Details) - shares shares in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Stock Issued During Period, Shares, Restricted Stock Award, Gross	1.2
Preferred Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from dilutive common shares calculation		11.4

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Commitments and Contingencies Commitment and Contingencies (Details)	Mar. 31, 2017
Subject to Capital Lease with Sprint, TMO, or AT&T [Member]
Other Commitments [Line Items]
Purchase Option, Percentage of Towers	53.00%

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Equity (Details) - USD ($) $ / shares in Units, shares in Millions		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Dividends Payable [Line Items]
Common Stock, Dividends, Per Share, Cash Paid	[1]	$ 0.950
Dividends, Common Stock, Cash	[1]	$ 343,300,000
Common stock repurchased during period, shares		0.2
Purchases of capital stock		$ 22,005,000	$ 24,354,000
Common Stock [Member]
Dividends Payable [Line Items]
Dividends Payable, Date Declared	[1]	Feb. 17, 2017
Dividends Payable, Date to be Paid	[1]	Mar. 31, 2017
Dividends Payable, Date of Record	[1]	Mar. 17, 2017
At the Market Program [Member]
Dividends Payable [Line Items]
Payments of Stock Issuance Costs		$ 200,000

[1] Inclusive of dividends accrued for holders of unvested restricted stock units, which are paid at the time the restricted stock units vest.

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Equity Other Equity Activity (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Class of Stock [Line Items]
Proceeds from Issuance of Common Stock	$ 21,937	$ 323,798
At the Market Stock Offering Program, capacity remaining	150,000
Common Stock, Capital Shares Reserved for Future Issuance	500,000
At the Market Program [Member]
Class of Stock [Line Items]
Proceeds from Issuance of Common Stock	22,009
Payments of Stock Issuance Costs	200
Common Stock [Member]
Class of Stock [Line Items]
Stock Issued During Period, Shares, New Issues		3,828,064
Common Stock [Member] | At the Market Program [Member]
Class of Stock [Line Items]
Proceeds from Issuance of Common Stock	$ (2)
Stock Issued During Period, Shares, New Issues	242,300

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Operating Segments Operating Segments Table (Details) $ in Thousands		3 Months Ended
		Mar. 31, 2017 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2016 USD ($)
Segment Reporting Information [Line Items]
Tower Count		40,000
Segment site rental revenues		$ 856,936	$ 799,294
Segment network services and other revenues		$ 159,006	135,090
Fiber Miles		27,500
Segment revenues		$ 1,015,942	934,384
Segment site rental cost of operations	[1]	265,017	252,621
Segment network services and other cost of operations	[1]	98,808	80,971
Segment general and administrative expenses		100,724	97,581
Stock-based compensation expense		22,226	19,895
Depreciation, Amortization and Accretion, Net		288,549	277,875
Interest expense and amortization of deferred financing costs		134,487	126,378
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest		123,507	51,712
Capital expenditures		262,415	193,489
Total Assets		23,776,842		$ 22,675,092
Amortization of prepaid lease purchase price adjustments		5,100	5,200
Segment cost of operations share-based compensation [Member]
Segment Reporting Information [Line Items]
Stock-based compensation expense		4,900	8,300
Towers [Member]
Segment Reporting Information [Line Items]
Segment site rental revenues		716,536	702,840
Segment network services and other revenues		149,615	125,010
Segment revenues		866,151	827,850
Segment site rental cost of operations		209,464	204,565
Segment network services and other cost of operations		88,936	69,989
Segment cost of operations	[2]	298,400	274,554
Segment site rental gross margin		507,072	498,275
Segment network services gross margin		60,679	55,021
Segment general and administrative expenses	[2]	23,760	23,599
Segment Operating Profit		543,991	529,697
Capital expenditures		101,475	111,041
Total Assets		18,255,108	18,090,100
Small Cells [Member]
Segment Reporting Information [Line Items]
Segment site rental revenues		140,400	96,454
Segment network services and other revenues		9,391	10,080
Segment revenues		149,791	106,534
Segment site rental cost of operations		47,246	37,483
Segment network services and other cost of operations		8,229	8,035
Segment cost of operations	[2]	55,475	45,518
Segment site rental gross margin		93,154	58,971
Segment network services gross margin		1,162	2,045
Segment general and administrative expenses	[2]	17,689	15,522
Segment Operating Profit		76,627	45,494
Capital expenditures		154,266	80,153
Total Assets		5,053,536	3,188,474
Consolidated Total [Member]
Segment Reporting Information [Line Items]
Segment site rental revenues		856,936	799,294
Segment network services and other revenues		159,006	135,090
Segment revenues		1,015,942	934,384
Segment site rental cost of operations		256,710	242,048
Segment network services and other cost of operations		97,165	78,024
Segment cost of operations	[2]	353,875	320,072
Segment site rental gross margin		600,226	557,246
Segment network services gross margin		61,841	57,066
Segment general and administrative expenses	[2]	80,655	75,192
Segment Operating Profit		581,412	539,120
Stock-based compensation expense		24,942	30,705
Depreciation, Amortization and Accretion, Net		288,549	277,875
Interest expense and amortization of deferred financing costs		134,487	126,378
Other expenses to reconcile to income (loss) from continuing operations before income taxes		9,927	52,450
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest		123,507	51,712
Capital expenditures		262,415	193,489
Total Assets		23,776,842	21,718,251
Other [Member]
Segment Reporting Information [Line Items]
Segment general and administrative expenses	[2]	39,206	36,071
Segment Operating Profit		(39,206)	(36,071)
Stock-based compensation expense		24,942	30,705
Depreciation, Amortization and Accretion, Net		288,549	277,875
Interest expense and amortization of deferred financing costs		134,487	126,378
Other expenses to reconcile to income (loss) from continuing operations before income taxes		9,927	52,450
Capital expenditures		6,674	2,295
Total Assets		468,198	439,677
Segment G&A share-based compensation [Member]
Segment Reporting Information [Line Items]
Stock-based compensation expense		$ 20,100	$ 22,400

[1] Exclusive of depreciation, amortization and accretion shown separately.

[2] Segment cost of operations exclude (1) stock-based compensation expense of $4.9 million and $8.3 million for the three months ended March 31, 2017 and 2016, respectively, and (2) prepaid lease purchase price adjustments of $5.1 million and $5.2 million for the three months ended March 31, 2017 and 2016, respectively. Segment general and administrative expenses exclude stock-based compensation expense of $20.1 million and $22.4 million for the three months ended March 31, 2017 and 2016, respectively.

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Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Supplemental Cash Flow Information [Line Items]
Interest paid	$ 144,452	$ 111,469
Income taxes paid	796	6,773
Increase (decrease) in accounts payable for purchases of property and equipment	(17,876)	(8,638)
Purchase of property and equipment under capital leases and installment purchases	$ 9,226	$ 12,269

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Subsequent Events (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($) shares	Mar. 31, 2016 USD ($) shares
Subsequent Event [Line Items]
Proceeds from Issuance or Sale of Equity	$ 21,937	$ 323,798
Common Stock [Member]
Subsequent Event [Line Items]
Stock Issued During Period, Shares, New Issues | shares		3,828,064
Wilcon Acquisition [Member]
Subsequent Event [Line Items]
Business Acquisition, Date of Acquisition Agreement	Apr. 17, 2017
Business Combination, Consideration Transferred	$ 600,000
Fiber Miles Acquired	1,900
4.750% Senior Unsecured Notes [Member] [Member] | Issuance of debt obligation [Member]
Subsequent Event [Line Items]
Debt Instrument, Face Amount	$ 350,000
Debt Instrument, Interest Rate, Stated Percentage	4.75%
Debt Instrument, Maturity Date	May 01, 2047
Debt Instrument, Issuance Date	May 01, 2017
May 2017 Equity Offering [Member] | Sale of Stock [Domain] | Common Stock [Member]
Subsequent Event [Line Items]
Sale of Stock, Transaction Date	May 01, 2017
Stock Issued During Period, Shares, New Issues | shares	4,800,000
Proceeds from Issuance or Sale of Equity	$ 440,000