Debt

The following table summarizes our long-term debt obligations, net of current maturities, at December 31. The interest rates shown in parentheses are as of December 31, 2014.



($ in millions)	2014		2013
Term loan, due 2014 (8.40%)	$	—	$	0.1
Series B floating rate notes, due 2015 (1.13%)	25.0		25.0
Euro note B, due 2016 (4.38%)	74.3		84.1
Capital leases, due through 2016 (6.0%)	0.2		0.4
Revolving credit facility, due 2017 (1.71%)	29.7		53.7
Term loan, due 2018 (1.66%)	39.2		41.3
Note payable, due 2019	0.3		0.3
Series A notes, due 2022 (3.67%)	42.0		42.0
Series B notes, due 2024 (3.82%)	53.0		53.0
Series C notes, due 2027 (4.02%)	73.0		73.0
Convertible debt, due 2047 (4.0%)	—		0.6
Total debt	336.7		373.5
Less: current portion of long-term debt	27.2		2.2
Long-term debt	$	309.5	$	371.3

Series B Notes

As of December 31, 2014, there is one tranche remaining from our 2005 private placement, for $25.0 million that matures on July 28, 2015. The Series B Notes bear interest at LIBOR plus 0.9 percentage points. Please refer to Note 9, Derivative Financial Instruments, for a discussion of the interest-rate swap agreement associated with the Series B Notes.

Euro-denominated Note

Our Euro note B of €61.1 million ($74.3 million at December 31, 2014) has a term of 10 years due February 27, 2016 at a fixed annual interest rate of 4.38%. This Euro-denominated note, in conjunction with the Euro-denominated revolver borrowings mentioned below, is accounted for as a hedge of our net investment in our European subsidiaries.

Revolving Credit Facility

In 2012, we entered into a $300.0 million multi-currency revolving credit facility, which expires in April 2017 and contains an accordion feature allowing the maximum to be increased through a term loan to $350.0 million upon approval by the banks. Up to $30.0 million of the credit facility is available for swing-line loans and up to $30.0 million is available for the issuance of letters of credit. Borrowings under the revolving credit facility bear interest at a rate equal to LIBOR plus a margin ranging from 1.25 to 2.25 percentage points, which is based on the ratio of our senior debt to modified EBITDA. The credit facility contains representations and covenants that require compliance with, among other restrictions, a maximum leverage ratio and a minimum interest coverage ratio. The credit facility also contains usual and customary default provisions, limitations on liens securing indebtedness, asset sales, distributions and acquisitions. Total lender and other third party costs incurred of $2.4 million, a portion of which represents unamortized debt issuance costs from our prior credit facility, were recorded in other noncurrent assets and are being amortized as additional interest expense over the term of this facility.

At December 31, 2014, we had $29.7 million in outstanding long-term borrowings under this facility, of which $4.2 million was denominated in Yen and $25.5 million in Euro. These borrowings, together with outstanding letters of credit of $3.5 million, resulted in a borrowing capacity available under this facility of $266.8 million at December 31, 2014. The total amount outstanding under this facility as of December 31, 2013 of $53.7 million was classified as long-term.

Term Loan

In 2013, we entered into a $42.8 million five-year term loan due January 2018 related to our corporate office and research building. Borrowings under the loan bear interest at a variable rate equal to LIBOR plus a margin of 1.50 percentage points. At December 31, 2014, $39.2 million was outstanding under this loan, of which $2.1 million was classified as current. Please refer to Note 9, Derivative Financial Instruments, for a discussion of the interest-rate swap agreement associated with this loan.

Private Placement

In 2012, we concluded a private placement issuance of $168.0 million in senior unsecured notes. The total amount of the private placement issuance was divided into three tranches - $42.0 million 3.67% Series A Notes due July 5, 2022, $53.0 million 3.82% Series B Notes due July 5, 2024, and $73.0 million 4.02% Series C Notes due July 5, 2027 (the “Notes”). The Notes rank pari passu with our other senior unsecured debt. The proceeds from the issuance reduced indebtedness under our prior revolving credit facility that was incurred to finance our 2012 repurchase of our Convertible Debentures discussed below. The weighted average of the coupon interest rates on the Notes is 3.87%. Related interest-rate hedging and transaction costs incurred increased the annual effective rate of interest on the Notes to an estimated 4.16%. Refer to Note 9, Derivative Financial Instruments, for additional discussion of the related interest rate hedge. In connection with this issuance, we incurred lender and other third party costs of $1.2 million which were recorded in other noncurrent assets and are being amortized as additional interest expense over the term of the Notes.

Convertible Debt

In 2007, the Company issued $161.5 million of Convertible Debentures. In 2012, we repurchased $158.4 million in aggregate principal amount of the Convertible Debentures, representing 98.06% of the aggregate outstanding principal amount. During 2013, we repurchased an additional $2.5 million and in 2014, we repurchased the remaining $0.6 million in aggregate principal amount of our Convertible Debentures. As a result of these repurchases, we recognized a pre-tax loss on debt extinguishment of less than $0.1 million in 2014, and a pre-tax loss on debt extinguishment of $0.2 million and $11.6 million during 2013 and 2012, respectively.

Covenants

Pursuant to the financial covenants in our debt agreements, we are required to maintain established interest coverage ratios and to not exceed established leverage ratios. In addition, the agreements contain other customary covenants, none of which we consider restrictive to our operations. At December 31, 2014, we were in compliance with all of our debt covenants, and we expect to continue to be in compliance with the terms of these agreements throughout 2015.

Interest costs incurred during 2014, 2013 and 2012 were $18.1 million, $18.6 million and $18.6 million, respectively. The aggregate annual maturities of long-term debt were as follows: 2015 - $27.2 million, 2016 - $76.8 million, 2017 - $32.1 million, 2018 - $32.6 million, 2019 - immaterial, and thereafter - $168.0 million.