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Fair Value of Financial Instruments (Tables) | 12 Months Ended
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Dec. 31, 2014
Fair Value Disclosures [Abstract] |
Carrying Value and Fair Value of Long-Term Debt | The following table sets forth the carrying value and fair value of long-term debt as of December 31:
|  | December 31, 2014 |  |  | December 31, 2013 |
In thousands |  |  | Carrying Value |  |  |  | Fair Value |  |  |  | Carrying Value |  |  |  | Fair Value |
Variable rate debt |  | $ | 90,555 |  |  | $ | 90,555 |  |  | $ | 133,540 |  |  | $ | 133,540 |
Fixed-rate bonds |  |  | 250,000 |  |  |  | 255,470 |  |  |  | 250,000 |  |  |  | 254,533 |
2.05% Term loan |  |  | 51,902 |  |  |  | 53,106 |  |  |  | 58,785 |  |  |  | 57,952 |
2.40% Term loan |  |  | 12,155 |  |  |  | 12,626 |  |  |  | – |  |  |  | – |
Total |  | $ | 404,612 |  |  | $ | 411,757 |  |  | $ | 442,325 |  |  | $ | 446,025 |

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