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Consolidated Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Accumulated provision for uncollectible accounts - customers |  |  |
Consolidated Valuation and Qualifying Accounts |  |  |
Beginning Balance | $ 68,775 | $ 59,266 | $ 51,630
Charged to Income | 81,719 | 114,249 | 90,144
Charged to Other Accounts | 15,222 | 54,199 | 36,373
Deductions | 112,409 | 158,939 | 118,881
Ending Balance | 53,307 | 68,775 | 59,266
Accumulated provision for uncollectible accounts - customers | FES |  |  |
Consolidated Valuation and Qualifying Accounts |  |  |
Beginning Balance | 8,466 | 17,862 | 11,073
Charged to Income | 4,766 | 7,411 | 21,942
Charged to Other Accounts | 0 | 0 | 0
Deductions | 8,334 | 16,807 | 15,153
Ending Balance | 4,898 | 8,466 | 17,862
Accumulated provision for uncollectible accounts - other |  |  |
Consolidated Valuation and Qualifying Accounts |  |  |
Beginning Balance | 5,231 | 5,197 | 2,976
Charged to Income | 13,597 | 899 | 3,469
Charged to Other Accounts | 11,329 | 4,189 | 8,264
Deductions | 29,273 | 5,054 | 9,512
Ending Balance | 884 | 5,231 | 5,197
Accumulated provision for uncollectible accounts - other | FES |  |  |
Consolidated Valuation and Qualifying Accounts |  |  |
Beginning Balance | 2,500 | 2,500 | 2,523
Charged to Income | 0 | 0 | 9
Charged to Other Accounts | 0 | 0 | 0
Deductions | 2,500 | 0 | 32
Ending Balance | 0 | 2,500 | 2,500
Valuation allowance on state and local DTAs |  |  |
Consolidated Valuation and Qualifying Accounts |  |  |
Beginning Balance | 192,397 |  |
Charged to Income | 245,382 |  |
Charged to Other Accounts | 0 |  |
Deductions | 0 |  |
Ending Balance | 437,779 | 192,397 |
Loss carryforward tax valuation reserve |  |  |
Consolidated Valuation and Qualifying Accounts |  |  |
Beginning Balance | 192,397 | 174,004 | 125,360
Charged to Income |  | 18,393 | 48,644
Charged to Other Accounts |  | 0 | 0
Deductions |  | 0 | 0
Ending Balance |  | 192,397 | 174,004
Loss carryforward tax valuation reserve | FES |  |  |
Consolidated Valuation and Qualifying Accounts |  |  |
Beginning Balance | 45,808 | 32,126 | 26,875
Charged to Income | 151,682 | 13,682 | 5,251
Charged to Other Accounts | 0 | 0 | 0
Deductions | 0 | 0 | 0
Ending Balance | $ 197,490 | $ 45,808 | $ 32,126

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- Definition Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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- Definition Amount of increase in the allowances and reserves, which consist of the valuation and qualifying accounts that are either netted against the cost of an asset or that reflect a liability established to represent expected future costs, from charges to costs and expenses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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- Definition Total of the deductions in a given period to allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, representing receivables written off as uncollectible and portions of the reserves utilized, respectively. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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