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Consolidated Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Accumulated provision for uncollectible accounts - customers |  |  |
Consolidated Valuation and Qualifying Accounts |  |  |
Beginning Balance | $ 53,307 | $ 68,775 | $ 59,266
Charged to Income | 75,859 | 81,719 | 114,249
Charged to Other Accounts | 49,728 | 15,222 | 54,199
Deductions | 127,607 | 112,409 | 158,939
Ending Balance | 51,287 | 53,307 | 68,775
Accumulated provision for uncollectible accounts - customers | FES |  |  |
Consolidated Valuation and Qualifying Accounts |  |  |
Beginning Balance | 4,898 | 8,466 | 17,862
Charged to Income | 2,373 | 4,766 | 7,411
Charged to Other Accounts | 0 | 0 | 0
Deductions | 4,921 | 8,334 | 16,807
Ending Balance | 2,350 | 4,898 | 8,466
Accumulated provision for uncollectible accounts - other |  |  |
Consolidated Valuation and Qualifying Accounts |  |  |
Beginning Balance | 884 | 5,231 | 5,197
Charged to Income | 6,495 | 13,597 | 899
Charged to Other Accounts | 0 | 11,329 | 4,189
Deductions | 6,357 | 29,273 | 5,054
Ending Balance | 1,022 | 884 | 5,231
Accumulated provision for uncollectible accounts - other | FES |  |  |
Consolidated Valuation and Qualifying Accounts |  |  |
Beginning Balance | 0 | 2,500 | 2,500
Charged to Income | 34 | 0 | 0
Charged to Other Accounts | 0 | 0 | 0
Deductions | 2 | 2,500 | 0
Ending Balance | 32 | 0 | 2,500
Valuation allowance on state and local DTAs |  |  |
Consolidated Valuation and Qualifying Accounts |  |  |
Beginning Balance | 437,779 | 192,397 | 174,004
Charged to Income | 142,623 | 245,382 | 18,393
Charged to Other Accounts | 0 | 0 | 0
Deductions | 0 | 0 | 0
Ending Balance | 580,402 | 437,779 | 192,397
Valuation allowance on state and local DTAs | FES |  |  |
Consolidated Valuation and Qualifying Accounts |  |  |
Beginning Balance | 197,490 | 45,808 | 32,126
Charged to Income | 70,777 | 151,682 | 13,682
Charged to Other Accounts | 0 | 0 | 0
Deductions | 0 | 0 | 0
Ending Balance | $ 268,267 | $ 197,490 | $ 45,808

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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 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 accounts other than 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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