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Note 4 - Fair Value Measurements | 9 Months Ended
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Sep. 30, 2021
Notes to Financial Statements |
Fair Value Disclosures [Text Block] | 4. Fair Value Measurements: We have certain assets and liabilities that are reported at fair value in our accompanying condensed consolidated balance sheets. To increase consistency and comparability of assets and liabilities recorded at fair value, Accounting Standards Codification ("ASC") 820-10, Fair Value Measurements ("ASC 820-10"), established a three-level fair value hierarchy to prioritize the inputs to valuation techniques used to measure fair value. ASC 820-10 requires disclosures detailing the extent to which companies measure assets and liabilities at fair value, the methods and assumptions used to measure fair value, and the effect of fair value measurements on earnings. In accordance with ASC 820-10, we applied the following fair value hierarchy:
Level 1 - | Assets or liabilities for which the identical item is traded on an active exchange, such as publicly-traded instruments.
Level 2 - | Assets or liabilities valued based on observable market data for similar instruments.
Level 3 - | Assets or liabilities for which significant valuation assumptions are not readily observable in the market; instruments valued based on the best available data, some of which are internally-developed, and considers risk premiums that market participants would require.
The fair values of cash and cash equivalents, accounts receivable, accounts payable and accrued liabilities, and short-term debt approximate their carrying amounts because of the short-term nature of these instruments. Our investments in registered investment companies, which are Level 1 assets measured at fair value on a recurring basis, were $4.6 million and $4.1 million as of September 30, 2021 and December 31, 2020, respectively. Our investments in registered investment companies are valued using quoted prices in active markets multiplied by the number of shares owned and were included in "Other current assets" in our accompanying condensed consolidated balance sheets. We elected not to carry our long-term debt at fair value. The carrying value of the long-term debt represents amortized cost, inclusive of unamortized premium, and net of unamortized discount and debt issuance costs. We assess the fair value of these financial instruments based on an estimate of interest rates available to us for financial instruments with similar features, our current credit rating, and spreads applicable to us. The following table summarizes the carrying value and estimated fair value of these financial instruments as of September 30, 2021 and December 31, 2020, respectively:
|  |  | 2021 |  |  | 2020 |
| Fair Value |  | Carrying |  |  | Estimated |  |  | Carrying |  |  | Estimated |
| Hierarchy |  | Value |  |  | Fair Value |  |  | Value |  |  | Fair Value |
Financial instruments not carried at fair value: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Senior notes (Note 10) | Level 2 |  | $ | 2,691.6 |  |  | $ | 3,028.4 |  |  | $ | 3,140.8 |  |  | $ | 3,652.2 |
On February 1, 20 20, the sale of the aerial imagery sourcing group was completed. We contributed the assets related to the disposed business and cash of $63.8 million in exchange for a noncontrolling 35.0% ownership interest in a nonpublic company, Vexcel Group, Inc. ("Vexcel"). On May 25, 2021, we made an additional $15.0 million cash investment in Vexcel for an additional 3.7% ownership. As of September 30, 2021 and December 31, 2020, we had an investment of $144.1 million and $129.1 million, respectively, related to such interest. This investment was included in "Other noncurrent assets" in our accompanying condensed consolidated balance sheets. Refer to Note 7. Dispositions for further discussion. As of September 30, 2021 and December 31, 2020, we had securities of $161.6 million and $143.1 million, respectively, which were accounted for as cost-based investments. We do not have the ability to exercise significant influence over the investees’ operating and financial policies. As of September 30, 2021 and December 31, 2020, we also had investments in private companies of $51.8 million and $49.5 million, respectively, accounted for in accordance with ASC 323-10-25, The Equity Method of Accounting for Investments in Common Stock ("ASC 323-10-25") as equity method investments. These investments were included in "Other noncurrent assets" in our accompanying condensed consolidated balance sheets. For the three and nine months ended September 30, 2021, there was no provision for credit losses related to these investments.

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- 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. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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