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Fair Value of Financial Instruments (Tables) | 3 Months Ended
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Mar. 31, 2015
Fair Value Disclosures [Abstract] |
Carrying Value and Fair Value of Long-Term Debt | The following table sets forth carrying value and fair value of long-term debt:
|  | March 31, 2015 |  |  | December 31, 2014 |
In thousands |  | Carrying Value |  |  | Fair Value |  |  | Carrying Value |  |  | Fair Value |
Variable rate debt |  | $ | 80,030 |  |  | $ | 80,030 |  |  | $ | 90,555 |  |  | $ | 90,555 |
Fixed-rate bonds |  |  | 250,000 |  |  |  | 256,563 |  |  |  | 250,000 |  |  |  | 255,470 |
2.05% Term loan |  |  | 45,870 |  |  |  | 47,567 |  |  |  | 51,902 |  |  |  | 53,106 |
2.40% Term loan |  |  | 10,742 |  |  |  | 11,291 |  |  |  | 12,155 |  |  |  | 12,626 |
Total |  | $ | 386,642 |  |  | $ | 395,451 |  |  | $ | 404,612 |  |  | $ | 411,757 |

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- Definition Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13433-108611 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13467-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13476-108611 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14172-108612 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6447952&loc=d3e13220-108610 + Details
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