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Long-Term Debt (Tables) | 12 Months Ended
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Dec. 31, 2014
Debt Disclosure [Abstract] |
Long-Term Debt Instrument | Long-term debt at December 31 consisted of the following:
(in thousands) |  | 2014 |  |  | 2013 |
Current portion of long-term debt: |  |  |  |  |  |  |  |
Current portion of 5-year term loan facility expires 2019 |  | $ | 20,625 |  |  | $ | — |
6.080% senior notes, Series B, semi-annual interest payments, balloon due 2014 |  |  | — |  |  |  | 100,000 |
5.370% senior notes, Series D, quarterly interest payments, balloon due 2015 |  |  | 25,000 |  |  |  | — |
Total current portion of long-term debt |  | $ | 45,625 |  |  | $ | 100,000 |
Long-term debt: |  |  |  |  |  |  |  |
Note agreements: |  |  |  |  |  |  |  |
5.370% senior notes, Series D, quarterly interest payments, balloon due 2015 |  | $ | — |  |  | $ | 25,000 |
5.660% senior notes, Series C, semi-annual interest payments, balloon due 2016 |  |  | 25,000 |  |  |  | 25,000 |
4.500% senior notes, Series E, quarterly interest payments, balloon due 2018 |  |  | 100,000 |  |  |  | 100,000 |
4.200% senior notes, semi-annual interest payments, balloon due 2024 |  |  | 498,471 |  |  |  | — |
Total notes |  | $ | 623,471 |  |  | $ | 150,000 |
Credit agreements: |  |  |  |  |  |  |  |
Periodic payments of interest, LIBOR plus 1.00%, expires December 31, 2016 |  | $ | — |  |  | $ | 100,000 |
Quarterly payments of interest, LIBOR plus 1.00%, expires December 31, 2016 |  |  | — |  |  |  | 100,000 |
Periodic payments of interest, LIBOR plus 1.00%, expires December 31, 2016 |  |  | — |  |  |  | 30,000 |
5-year term-loan facility, periodic interest and principal payments, currently LIBOR plus 1.375%, expires May 20, 2019 |  |  | 529,375 |  |  |  | — |
5-year revolving-loan facility, periodic interest payments, currently LIBOR plus 1.175%, plus commitment fees of 0.20%, expires May 20, 2019 |  |  | — |  |  |  | — |
Revolving credit loan, quarterly interest payments, LIBOR plus up to 1.40% and availability fee up to 0.25%, expires December 31, 2016 |  |  | — |  |  |  | — |
Total credit agreements |  | $ | 529,375 |  |  | $ | 230,000 |
Total long-term debt |  | $ | 1,152,846 |  |  | $ | 380,000 |
Current portion of long-term debt |  | $ | 45,625 |  |  | $ | 100,000 |
Total debt |  | $ | 1,198,471 |  |  | $ | 480,000 |

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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 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400 Reference 2: 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 3: 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=6451184&loc=d3e28551-108399 Reference 4: 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=6451184&loc=d3e28541-108399 Reference 5: 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=6928386&loc=d3e21475-112644 Reference 6: 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 7: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 8: 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=6928386&loc=d3e21506-112644 Reference 9: 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=6928386&loc=d3e21521-112644 Reference 10: 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=6928386&loc=d3e21538-112644 Reference 11: 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=6479336&loc=d3e64711-112823 + Details
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