	September 30,			December 31,			September 30,
	2018			2017			2017
	(Dollars in Thousands)
6.60% Senior Notes, due 2018	$	—		$	299,871		$	299,774
7% Debentures, due 2025		124,249			124,180			124,157
6.25% Senior Notes, due 2037		228,079			228,033			228,018
4.25% Senior Notes, due 2024		396,251			395,814			395,673
4.250% Senior Notes, due 2047		591,499			591,688			—
3.500% Senior Notes, due 2027		494,643			494,352			—
3.450% Senior Notes, due 2027		296,861			296,628			296,551
Floating Rate Senior Notes, due 2019, interest rate of 2.84% and 2.13% at September 30, 2018 and December 31, 2017, respectively		299,074			298,102			—
Floating Rate Notes, due 2020, interest rate of 2.96%, 2.10% and 1.96% at September 30, 2018, December 31, 2017 and September 30, 2017, respectively		298,773			298,227			298,046
Revolving Facility, due 2022, interest rate of 3.29% at September 30, 2018		100,000			—			—
Trade Receivable Facility, interest rate of 2.83% and 1.96% at September 30, 2018 and 2017, respectively		380,000			—			80,000
Other notes		269			308			321
Total debt		3,209,698			3,027,203			1,722,540
Less: Current maturities of long-term debt and short-term facilities		(380,041	)		(299,909	)		(80,038	)
Long-term debt	$	2,829,657		$	2,727,294		$	1,642,502

On April 17, 2018, the Company, through a wholly-owned special-purpose subsidiary, increased its trade receivable securitization facility (the Trade Receivable Facility) to $400,000,000. The Trade Receivable Facility, with SunTrust Bank, Regions Bank, PNC Bank, N.A., The Bank of Tokyo-Mitsubishi UFJ, LTD. (New York Branch), and certain other lenders that may become a party to the facility from time to time, is backed by eligible trade receivables, as defined, and is limited to the lesser of the facility limit or the borrowing base, as defined, of $465,217,000, $338,784,000 and $402,754,000 at September 30, 2018, December 31, 2017 and September 30, 2017, respectively. These receivables are originated by the Company and then sold to the wholly-owned special-purpose subsidiary by the Company. The Company continues to be responsible for the servicing and administration of the receivables purchased by the wholly-owned special-purpose subsidiary. Borrowings under the Trade Receivable Facility bear interest at a rate equal to one-month London Inter-bank Offered Rate, or LIBOR, plus 0.725%, subject to change in the event that this rate no longer reflects the lender’s cost of lending. On September 25, 2018, the Company extended the maturity date of Trade Receivable Facility, which contains a cross-default provision to the Company’s other debt agreements, to September 25, 2019.

On April 16, 2018, the maturity date, the Company repaid the $300,000,000 of the 6.6% Senior Notes with cash on hand.

The Company has a $700,000,000 five-year senior unsecured revolving facility (the Revolving Facility) with JPMorgan Chase Bank, N.A., as Administrative Agent, Branch Banking and Trust Company (BB&T), Deutsche Bank Securities, Inc., SunTrust Bank and Wells Fargo Bank, N.A., as Co-Syndication Agents, and the lenders party thereto. The Revolving Facility requires the Company’s ratio of consolidated debt-to-consolidated earnings before interest, taxes, depreciation and amortization (EBITDA), as defined by the Revolving Facility, for the trailing-twelve months (the Ratio) to not exceed 3.50x as of the end of any fiscal quarter, provided that the Company may exclude from the Ratio debt incurred in connection with certain acquisitions during such quarter or the three preceding quarters so long as the Ratio calculated without such exclusion does not exceed 3.75x. Additionally, if no amounts are outstanding under both the Revolving Facility and the Trade Receivable Facility, consolidated debt, including debt for which the Company is a co-borrower, may be reduced by the Company’s unrestricted cash and cash equivalents in excess of $50,000,000, such reduction not to exceed $200,000,000, for purposes of the covenant calculation. The Company was in compliance with this Ratio at September 30, 2018.

Available borrowings under the Revolving Facility are reduced by any outstanding letters of credit issued by the Company under the Revolving Facility. The Company had $2,301,000 of outstanding letters of credit issued under the Revolving Facility at September 30, 2018 and December 31, 2017 and $1,963,000 at September 30, 2017.

Accumulated other comprehensive loss includes the unamortized value of terminated forward starting interest rate swap agreements. The amortization of the terminated value of the forward starting interest rate swap agreements was complete with the maturity of the related debt in April 2018. For the nine-months ended September 30, 2018, the Company recognized $458,000 as additional interest expense. For the three- and nine-months ended September 30, 2017, the Company recognized $369,000 and $1,089,000, respectively, as additional interest expense.