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Debt (Tables) | 6 Months Ended
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Jun. 30, 2018
Debt Disclosure [Abstract] |
Debt | At June 30, 2018, and December 31, 2017, debt comprised the following:
(In thousands) |  | Maturity Dates |  | June 30, 2018 |  |  | December 31, 2017 |
Unsecured private placement notes |  |  |  |  |  |  |  |  |  |
3.95% (net of unamortized debt issuance cost of $381 and $346 for 2018 and 2017, respectively) |  | 2021-2027 |  | $ | 99,619 |  |  | $ | 99,654 |
3.86% (net of unamortized debt issuance cost of $375 and $343 for 2018 and 2017, respectively) |  | 2019-2025 |  |  | 99,625 |  |  |  | 99,657 |
4.86% (net of unamortized debt issuance cost of $205 and $191 for 2018 and 2017, respectively) |  | 2018-2023 |  |  | 55,509 |  |  |  | 55,523 |
5.88% (net of unamortized debt issuance cost of $99 and $95 for 2018 and 2017, respectively) |  | 2018-2022 |  |  | 22,758 |  |  |  | 28,476 |
5.69% (net of unamortized debt issuance cost of $7 and $12 for 2018 and 2017, respectively) |  | 2018 |  |  | 5,707 |  |  |  | 5,703 |
Debt of foreign subsidiaries |  |  |  |  |  |  |  |  |  |
Unsecured bank debt, foreign currency |  | 2018 |  |  | 3,598 |  |  |  | 1,786 |
Total debt |  |  |  | $ | 286,816 |  |  | $ | 290,799 |
Less current maturities |  |  |  |  | 24,312 |  |  |  | 22,500 |
Long-term debt |  |  |  | $ | 262,504 |  |  | $ | 268,299 |

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- Definition Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21475-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(e),(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21538-112644 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21506-112644 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28541-108399 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21521-112644 + Details
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