Fair Value Measurements

3 Months Ended

Mar. 31, 2015

2.FAIR VALUE MEASUREMENTS

Items Measured at Fair Value on a Recurring Basis— The Company’s earnout liabilities related to acquisitions are measured at fair value on a recurring basis using Level 3 inputs. Level 3 valuations rely on unobservable inputs for the asset or liability, and include situations where there is little, if any, market activity for the asset or liability. The Company determines the fair value of acquisition-related earnouts (contingent consideration) and any subsequent changes in fair value using a discounted probability-weighted approach using Level 3 inputs. The fair value of the earnouts is reviewed quarterly and is based on the payments the Company expects to make based on historical internal observations related to the anticipated performance of the underlying assets. The Company’s estimate of the fair value of its obligation if the performance targets contained in various acquisition agreements were met was $13.4 million and $15.1 million as of March 31, 2015 and December 31, 2014, respectively, which the Company recorded in Accrued expenses in the accompanying Consolidated Balance Sheets. Changes in estimate are recorded in Acquisition related adjustments and expenses in the accompanying Consolidated Statement of Operations. The maximum potential obligation related to the performance targets was $21.4 million as of March 31, 2015.

The following summarizes the activity of the accrued earnouts:



	2015		2014

	(in thousands)
Beginning balance, December 31, 2014 and 2013 , respectively	$	15,086	$	30,063
Additions		1,372		1,048
Payments		(1,234)		(5,019)
Change in estimate		(1,552)		648
Foreign currency translation adjustments		(319)		2,558
Ending balance, March 31, 2015 and March 31, 2014, respectively	$	13,353	$	29,298

Items Measured at Fair Value on a Nonrecurring Basis— The Company’s long-lived assets, intangibles, and asset retirement obligations are measured at fair value on a nonrecurring basis using Level 3 inputs. The Company considers many factors and makes certain assumptions when making this assessment, including but not limited to: general market and economic conditions, historical operating results, geographic location, lease-up potential and expected timing of lease-up. The fair value of the long-lived assets, intangibles, and asset retirement obligations is calculated using a discounted cash flow model.

During the three months ended March 31, 2015, the Company recognized an impairment charge of $6.8 million. The impairment charge includes the write off of $3.9 million in carrying value of decommissioned towers and $1.8 million of other third party decommission costs incurred related to the Company’s long-lived assets and intangibles for the three months ended March 31, 2015. In addition, the impairment charge includes $1.1 million in disposal costs related to the Company’s former corporate headquarters building for the three months ended March 31, 2015. During the three months ended March 31, 2014, the Company recognized an impairment charge of $3.6 million. The impairment charge includes the write off of $2.9 million in carrying value of decommissioned towers and $0.7 million of other third party decommission costs incurred related to the Company’s long-lived assets and intangibles for the three months ended March 31, 2014. These write offs result from the Company’s analysis that the future cash flows from certain towers would not recover the carrying value of the investment in those towers. Asset impairment and decommission costs and the related impaired assets relate to the Company’s site leasing operating segment.

Fair Value of Financial Instruments— The carrying values of cash and cash equivalents, accounts receivable, restricted cash, accounts payable, and short-term investments approximate their estimated fair values due to the short maturity of these instruments. Short-term investments consisted of $4.6 million and $5.3 million in certificate of deposits, as of March 31, 2015 and December 31, 2014, respectively. The Company’s estimate of the fair value of its held-to-maturity investments in treasury and corporate bonds, including current portion, are based primarily upon Level 1 reported market values. As of March 31, 2015 and December 31, 2014, the carrying value and fair value of the held-to-maturity investments, including current portion, were $1.0 million and $1.1 million, respectively.

The Company determines fair value of its debt instruments utilizing various Level 2 sources including quoted prices and indicative quotes (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 prices. The fair value of the Revolving Credit Facility is considered to approximate the carrying value because the interest payments are based on Eurodollar rates that reset every month. The Company does not believe its credit risk has changed materially from the date the applicable Eurodollar Rate plus 137.5 to 200.0 basis points was set for the Revolving Credit Facility. Refer to Note 10 for the fair values, principal balances, and carrying values of the Company’s debt instruments.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

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