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Recent Accounting Pronouncements (Details) - USD ($) $ in Thousands | Jun. 30, 2016 | Dec. 31, 2015
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Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |
Unamortized Debt Issuance Expense |  | $ 16,567 | $ 17,883
Other Assets | Accounting Standards Update 2015-03 |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |
Unamortized Debt Issuance Expense | [1] | (16,600) | (17,900)
Long-term Debt | Accounting Standards Update 2015-03 |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |
Unamortized Debt Issuance Expense | [1] | $ 16,600 | $ 17,900
[1] | In accordance with Accounting Standards Update ("ASU") 2015-03, loan issuance costs related to the Notes have been presented as a reduction to the Notes. At June 30, 2016, total unamortized debt issuance costs were $4.6 million for the October Notes, $1.0 million for the December Notes, $4.5 million for the August Notes and $6.4 million for the April Notes.

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- Definition The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset. + 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 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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