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DEBT | 12 Months Ended
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Dec. 31, 2017
Debt Instruments [Abstract] |
DEBT | 12. DEBT Debt consists of the following as of December 31:
(In thousands) |  | 2017 |  | 2017 |  | 2016 |  | 2016
|  | Carrying Value |  | Estimated Fair Value |  | Carrying Value |  | Estimated Fair Value
5.51% Senior notes due 2017 |  | — |  | — |  | 150,000 |  | 154,509
3.84% Senior notes due 2021 |  | 100,000 |  | 102,472 |  | 100,000 |  | 102,463
3.70% Senior notes due 2023 |  | 225,000 |  | 228,783 |  | 225,000 |  | 226,946
3.85% Senior notes due 2025 |  | 100,000 |  | 102,164 |  | 100,000 |  | 100,338
4.24% Senior notes due 2026 |  | 200,000 |  | 208,873 |  | 200,000 |  | 203,592
4.05% Senior notes due 2028 |  | 75,000 |  | 76,997 |  | 75,000 |  | 74,630
4.11% Senior notes due 2028 |  | 100,000 |  | 103,226 |  | 100,000 |  | 99,876
Other debt |  | 150 |  | 150 |  | 668 |  | 668
Total debt |  | 800,150 |  | 822,665 |  | 950,668 |  | 963,022
Debt issuance costs, net |  | (831) |  | (831) |  | (984) |  | (984)
Unamortized interest rate swap proceeds |  | 14,820 |  | 14,820 |  | 16,614 |  | 16,614
Total debt, net |  | 814,139 |  | 836,654 |  | 966,298 |  | 978,652
Less: current portion of long-term debt and short-term debt |  | 150 |  | 150 |  | 150,668 |  | 150,668
Total long-term debt |  | $813,989 |  | $836,504 |  | $815,630 |  | $827,984
The Corporation did not have any borrowings against the Revolving Credit Agreement in 2017 and 2016, respectively. The debt outstanding had fixed and variable interest rates averaging 3.9% in both 2017 and 2016, respectively. Aggregate maturities of debt are as follows:
(In thousands) |
2018 | $ | 150 |
2019 | — |
2020 | — |
2021 | 100,000 |
2022 | — |
Thereafter | 700,000 |
Total | $ | 800,150 |
Interest payments of $39 million, $38 million, and $33 million were made in 2017, 2016, and 2015, respectively. Revolving Credit Agreement In August 2012, the Corporation refinanced its existing credit facility by entering into a Third Amended and Restated Credit Agreement (Credit Agreement) with a syndicate of financial institutions, led by Bank of America N.A., Wells Fargo, N.A, and JP Morgan Chase Bank, N.A. The proceeds available under the Credit Agreement are to be used for working capital, internal growth initiatives, funding of future acquisitions, and general corporate purposes. Under the terms of the Credit Agreement, the Corporation has borrowing capacity of $500 million. In addition, the Credit Agreement provides an accordion feature which allows the Corporation to borrow an additional $100 million. As of December 31, 2017, the Corporation had $21 million in letters of credit supported by the credit facility and no borrowings outstanding under the credit facility. The unused credit available under the credit facility as of December 31, 2017 was $479 million, which the Corporation had the ability to borrow in full without violating its debt to capitalization covenant. In December 2014, the Corporation amended its existing credit facility by entering into a Second Amendment to the Third Amended and Restated Credit Agreement (Credit Agreement) with a syndicate of financial institutions, led by Bank of America N.A., Wells Fargo, N.A, and JP Morgan Chase Bank, N.A. The amendment extends the maturity date of the agreement to November 2019. No other material modifications were made to the 2012 Credit Agreement. The Credit Agreement contains covenants that the Corporation considers usual and customary for an agreement of this type for comparable commercial borrowers, including a maximum consolidated debt to capitalization ratio of 60%. The Credit Agreement has customary events of default, such as non-payment of principal when due; nonpayment of interest, fees, or other amounts; cross-payment default and cross-acceleration. Borrowings under the credit agreement will accrue interest based on (i) Libor or (ii) a base rate of the highest of (a) the federal funds rate plus 0.5%, (b) BofA’s announced prime rate, or (c) the Eurocurrency rate plus 1%, plus a margin. The interest rate and level of facility fees are dependent on certain financial ratios, as defined in the Credit Agreement. The Credit Agreement also provides customary fees, including administrative agent and commitment fees. In connection with the Credit Agreement, the Corporation paid customary transaction fees that have been deferred and are being amortized over the term of the Credit Agreement. Senior Notes On February 26, 2013, the Corporation issued $500 million of Senior Notes (the “2013 Notes”). The 2013 Notes consist of $225 million of 3.70% Senior Notes that mature on February 26, 2023, $100 million of 3.85% Senior Notes that mature on February 26, 2025, and $75 million of 4.05% Senior Notes that mature on February 26, 2028. $100 million of additional 4.11% Senior Notes were deferred and subsequently issued on September 26, 2013 that mature on September 26, 2028. The 2013 Notes are senior unsecured obligations, equal in right of payment to the Corporation’s existing senior indebtedness. The Corporation, at its option, can prepay at any time all or any part of the 2013 Notes, subject to a make-whole payment in accordance with the terms of the Note Purchase Agreement. In connection with the issuance of the 2013 Notes, the Corporation paid customary fees that have been deferred and are being amortized over the term of the 2013 Notes. Under the terms of the Note Purchase Agreement, the Corporation is required to maintain certain financial ratios, the most restrictive of which is a debt to capitalization limit of 60%. The debt to capitalization ratio (as defined per the Notes Purchase Agreement and Credit Agreement) is calculated using the same formula for all of the Corporation’s debt agreements and is a measure of the Corporation’s indebtedness to capitalization, where capitalization equals debt plus equity. As of December 31, 2017, the Corporation had the ability to borrow additional debt of $1.4 billion without violating our debt to capitalization covenant. The 2013 Notes also contain a cross default provision with respect to the Corporation’s other senior indebtedness. On December 8, 2011, the Corporation issued $300 million of Senior Notes (the “2011 Notes”). The 2011 Notes consist of $100 million of 3.84% Senior Notes that mature on December 1, 2021 and $200 million of 4.24% Senior Series Notes that mature on December 1, 2026. The 2011 Notes are senior unsecured obligations, equal in right of payment to our existing senior indebtedness. The Corporation, at its option, can prepay at any time all or any part of our 2011 Notes, subject to a make-whole payment in accordance with the terms of the Note Purchase Agreement. In connection with our 2011 Notes, the Corporation paid customary fees that have been deferred and are being amortized over the term of our 2011 Notes. Under the Note Purchase Agreement, the Corporation is required to maintain certain financial ratios, the most restrictive of which is a debt to capitalization limit of 60%. The 2011 Notes also contain a cross default provision with our other senior indebtedness. On December 1, 2005, the Corporation issued $150 million of 5.51% Senior Notes (the “2005 Notes”). The 2005 Notes, which matured on December 1, 2017 and were repaid in full, were senior unsecured obligations and equal in right of payment to the Corporation’s existing senior indebtedness. In connection with the Notes, the Corporation paid customary fees that were deferred and amortized over the terms of the Notes.

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- Definition The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -URI http://asc.fasb.org/topic&trid=2208564 + Details
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