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Fair Value Measurements (Details 4) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2016 | Dec. 31, 2015
Fair value of long-term debt estimated using quoted market prices or discounted future cash flows |  |
Loan term | 15 years |
Carrying Amount |  |
Fair value of long-term debt estimated using quoted market prices or discounted future cash flows |  |
Fair value of long-term debt | $ 345,576 | $ 280,486
Fair Value |  |
Fair value of long-term debt estimated using quoted market prices or discounted future cash flows |  |
Fair value of long-term debt | 348,221 | 284,188
Level 2 | Fixed rate long-term notes payable | Carrying Amount |  |
Fair value of long-term debt estimated using quoted market prices or discounted future cash flows |  |
Fair value of long-term debt | 308,645 | 241,111
Level 2 | Fixed rate long-term notes payable | Fair Value |  |
Fair value of long-term debt estimated using quoted market prices or discounted future cash flows |  |
Fair value of long-term debt | 310,338 | 244,101
Level 2 | Debenture bonds | Carrying Amount |  |
Fair value of long-term debt estimated using quoted market prices or discounted future cash flows |  |
Fair value of long-term debt | 36,931 | 39,375
Level 2 | Debenture bonds | Fair Value |  |
Fair value of long-term debt estimated using quoted market prices or discounted future cash flows |  |
Fair value of long-term debt | $ 37,883 | $ 40,087

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- Definition Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable. + References Reference 1: 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=49121117&loc=d3e13433-108611 Reference 2: 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=49121117&loc=d3e13476-108611 + Details
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