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Summary Of Significant Accounting Policies (Utility Taxes) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
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Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
Accounting Policies [Abstract] |  |  |  |
Utility related taxes | $ 13,552 | $ 12,573 | $ 35,136 | $ 30,938
Property taxes | 9,432 | 9,290 | 19,838 | 19,710
Other taxes | 818 | 752 | 1,490 | 1,352
Utilities Operating Expense, Taxes | $ 23,802 | $ 22,615 | $ 56,464 | $ 52,000

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- Definition A tax based on the assessed value of real estate by the local government. The tax is usually based on the value of property (including the land). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 720 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6419918&loc=d3e35301-107843 + Details
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- Definition Amount of operating expense for taxes other than income taxes of regulated operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(b)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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