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Note 4 - Fair Value of Financial Instruments | 6 Months Ended
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Jun. 30, 2018
Fair Value Disclosures [Abstract] |
Fair Value of Financial Instruments | Fair Value of Financial Instruments Available for sale securities, trading securities, equity securities and certain other assets are recorded at fair value. All changes in the fair value of trading securities, equity securities and certain other assets are included in our condensed consolidated statements of operations. All changes in the fair value of available for sale securities are recorded in accumulated other comprehensive income. As a result of our implementation of the update to the standard for the accounting of financial instruments, we elected to measure certain other investments using the net asset value as a practical expedient. See Note 1 “—Significant Accounting Policies—Recent Accounting Pronouncements—Accounting Standards Adopted During 2018” for additional information. There were no other changes to our fair value methodologies during the six months ended June 30, 2018. In accordance with GAAP, we established a three-level valuation hierarchy for disclosure of fair value measurements based on the transparency of inputs to the valuation of an asset or liability as of the measurement date. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level I measurements) and the lowest priority to unobservable inputs (Level III measurements). The level in the fair value hierarchy within which the fair value measurement falls is determined based on the lowest level input that is significant to the measurement in its entirety. The three levels of the fair value hierarchy are defined below:
Level I | — Unadjusted quoted prices for identical assets or liabilities in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities;
Level II | — Prices or valuations based on observable inputs other than quoted prices in active markets for identical assets and liabilities; and
Level III | — Prices or valuations that require inputs that are both significant to the fair value measurement and unobservable. Level III inputs are used to measure fair value only to the extent that observable inputs are not available.
The level of market activity used to determine the fair value hierarchy is based on the availability of observable inputs market participants would use to price an asset or a liability, including market value price observations. We provide a qualitative description of the valuation techniques and inputs used for recurring and non-recurring fair value measurements in our audited financial statements and notes thereto included in our 2017 Form 10-K. These unaudited condensed consolidated financial statements should be read in conjunction with the audited financial statements and notes thereto included in our 2017 Form 10-K. The following is a list of assets that are measured at fair value by hierarchy level as of June 30, 2018:
(In thousands) | Level I |  | Level II |  | Total |
Assets at Fair Value |  |  |  |  |  |
Investment Portfolio: |  |  |  |  |  |
U.S. government and agency securities | $ | 137,749 |  |  | $ | 19,457 |  |  | $ | 157,206 |  |
State and municipal obligations | — |  |  | 351,085 |  |  | 351,085 |  |
Money market instruments | 211,348 |  |  | — |  |  | 211,348 |  |
Corporate bonds and notes | — |  |  | 2,331,887 |  |  | 2,331,887 |  |
RMBS | — |  |  | 268,449 |  |  | 268,449 |  |
CMBS | — |  |  | 527,098 |  |  | 527,098 |  |
Other ABS | — |  |  | 693,672 |  |  | 693,672 |  |
Foreign government and agency securities | — |  |  | 50,433 |  |  | 50,433 |  |
Equity securities | 139,637 |  |  | 5,269 |  |  | 144,906 |  |
Other investments (1) | — |  |  | 172,993 |  |  | 172,993 |  |
Total Investments at Fair Value (2) | 488,734 |  |  | 4,420,343 |  |  | 4,909,077 |  | (3)
Total Assets at Fair Value | $ | 488,734 |  |  | $ | 4,420,343 |  |  | $ | 4,909,077 |  | (3)
______________________
(1) | Comprising short-term certificates of deposit and commercial paper.
(2) | Does not include certain other invested assets ($3.2 million), primarily invested in limited partnership investments valued using the net asset value as a practical expedient. Includes cash collateral held under securities lending agreements ($39.2 million) reinvested in money market instruments.
(3) | Includes $38.4 million of securities loaned to third-party Borrowers under securities lending agreements, classified as other assets in our consolidated balance sheets. See Note 5 for more information.
The following is a list of assets that are measured at fair value by hierarchy level as of December 31, 2017:
(In thousands) | Level I |  | Level II |  | Total |
Assets at Fair Value |  |  |  |  |  |
Investment Portfolio: |  |  |  |  |  |
U.S. government and agency securities | $ | 124,969 |  |  | $ | 8,023 |  |  | $ | 132,992 |  |
State and municipal obligations | — |  |  | 386,111 |  |  | 386,111 |  |
Money market instruments | 213,357 |  |  | — |  |  | 213,357 |  |
Corporate bonds and notes | — |  |  | 2,304,017 |  |  | 2,304,017 |  |
RMBS | — |  |  | 216,749 |  |  | 216,749 |  |
CMBS | — |  |  | 503,955 |  |  | 503,955 |  |
Other ABS | — |  |  | 676,158 |  |  | 676,158 |  |
Foreign government and agency securities | — |  |  | 36,448 |  |  | 36,448 |  |
Equity securities | 175,205 |  |  | 860 |  |  | 176,065 |  |
Other investments (1) | — |  |  | 25,720 |  |  | 25,720 |  |
Total Investments at Fair Value (2) | 513,531 |  |  | 4,158,041 |  |  | 4,671,572 |  | (3)
Total Assets at Fair Value | $ | 513,531 |  |  | $ | 4,158,041 |  |  | $ | 4,671,572 |  | (3)
______________________
(1) | Comprising short-term certificates of deposit and commercial paper.
(2) | Does not include certain other invested assets ($0.3 million), primarily invested in limited partnerships, accounted for as cost-method investments and not measured at fair value. Includes cash collateral held under securities lending agreements ($19.4 million) reinvested in money market instruments.
(3) | Includes $28.0 million of securities loaned to third-party Borrowers under securities lending agreements, classified as other assets in our consolidated balance sheets. See Note 5 for more information.
There were no Level III assets measured at fair value at June 30, 2018 or December 31, 2017, and no Level III liabilities. There were no investment transfers between Level I, Level II or Level III for the three and six months ended June 30, 2018 and 2017. Other Fair Value Disclosure The carrying value and estimated fair value of other selected assets and liabilities not carried at fair value in our condensed consolidated balance sheets were as follows as of the dates indicated:
| June 30, 2018 |  | December 31, 2017
(In thousands) | Carrying Amount |  | Estimated Fair Value |  | Carrying Amount |  | Estimated Fair Value
Assets: |  |  |  |  |  |  |
Other invested assets (1) | $ | — |  |  | $ | — |  |  | $ | 334 |  |  | $ | 3,226 |
Liabilities: |  |  |  |  |  |  |
Senior notes | 1,028,687 |  |  | 1,040,249 |  |  | 1,027,074 |  |  | 1,093,934 |
______________________
(1) | As a result of implementing the update to the standard for the accounting of financial instruments effective January 1, 2018, other invested assets are no longer carried at amortized cost.

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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/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -URI http://asc.fasb.org/topic&trid=2155941 + Details
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