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Debt (Tables) | 12 Months Ended
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Dec. 31, 2015
Debt Disclosure [Abstract] |
Debt | Debt comprised the following at December 31, 2015 and 2014:
(In thousands) |  | Maturity Dates |  | December 31, 2015 |  |  | December 31, 2014 |
Unsecured private placement notes |  |  |  |  |  |  |  |  |  |
3.95% |  | 2021-2027 |  | $ | 100,000 |  |  | $ | — |
3.86% |  | 2019-2025 |  |  | 100,000 |  |  |  | 100,000 |
4.86% |  | 2017-2023 |  |  | 65,000 |  |  |  | 65,000 |
5.88% |  | 2016-2022 |  |  | 40,000 |  |  |  | 40,000 |
5.69% |  | 2016-2018 |  |  | 17,142 |  |  |  | 22,857 |
6.86% |  | 2015 |  |  | — |  |  |  | 4,284 |
Unsecured U.S. bank debt |  | 2019 |  |  | — |  |  |  | 20,000 |
Debt of foreign subsidiaries |  |  |  |  |  |  |  |  |  |
Unsecured bank debt, foreign currency |  | 2016 |  |  | 4,810 |  |  |  | 12,043 |
Unsecured bank term loan, foreign currency |  | 2021 |  |  | 3,724 |  |  |  | 4,840 |
Secured bank term loan, foreign currency |  | 2015 |  |  | — |  |  |  | 2,723 |
Secured bank debt, foreign currency |  | 2016 |  |  | 1,947 |  |  |  | 1,638 |
Unsecured bank debt, U.S. dollars |  | 2015 |  |  | — |  |  |  | 546 |
Total debt |  |  |  | $ | 332,623 |  |  | $ | 273,931 |
Less current maturities |  |  |  |  | 18,806 |  |  |  | 27,034 |
Long-term debt |  |  |  | $ | 313,817 |  |  | $ | 246,897 |
Schedule of Net Interest Expense | Net interest expense for the years ended December 31, 2015, 2014 and 2013, comprised the following:
(In thousands) |  | 2015 |  |  | 2014 |  |  | 2013 |
Interest expense |  | $ | 15,488 |  |  | $ | 12,542 |  |  | $ | 11,104 |
Interest income |  |  | (217 | ) |  |  | (262 | ) |  |  | (57 | )
|  |  | 15,271 |  |  |  | 12,280 |  |  |  | 11,047 |
Capitalized interest |  |  | (738 | ) |  |  | (839 | ) |  |  | (689 | )
Interest expense, net |  | $ | 14,533 |  |  | $ | 11,441 |  |  | $ | 10,358 |

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