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Schedule II - Valuation and Qualifying Accounts (Notes) | 12 Months Ended
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Dec. 31, 2014
Valuation and Qualifying Accounts [Abstract] |
Schedule of Valuation and Qualifying Accounts Disclosure | SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS
| Balance at Beginning of Period | Charged To Cost and Expense | Charged to other accounts | Deductions | Balance at End of Period
| (Dollars in thousands)
Year ended December 31, 2012 |  |  |  |  |
Allowance for doubtful trade accounts receivable | $ | 734 |  | $ | — |  | $ | — |  | $ | — |  | $ | 734 |
Deferred tax asset - valuation allowance | $ | 773,714 |  | $ | — |  | $ | (117,362 | ) | $ | — |  | $ | 656,352 |
Year ended December 31, 2013 |  |  |  |  |  |  |  |  |
Allowance for doubtful trade accounts receivable | $ | 734 |  | $ | — |  | $ | — |  | $ | — |  | $ | 734 |
Deferred tax asset - valuation allowance | $ | 656,352 |  | $ | — |  | $ | 108,671 |  | $ | — |  | $ | 765,023 |
Year ended December 31, 2014 |  |  |  |  |
Allowance for doubtful trade accounts receivable | $ | 734 |  | $ | — |  | $ | 266 |  | $ | — |  | $ | 1,000 |
Deferred tax asset - valuation allowance | $ | 765,023 |  | $ | — |  | $ | (16,740 | ) | $ | — |  | $ | 748,283 |

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- Definition The entire disclosure for any allowance and reserve accounts (their beginning and ending balances, as well as a reconciliation by type of activity during the period). Alternatively, disclosure of the required information may be within the footnotes to the financial statements or a supplemental schedule to the financial statements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 09 -Article 12 + Details
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