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Schedule II - Valuation and Qualifying Accounts | 12 Months Ended
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Dec. 31, 2017
Valuation And Qualifying Accounts [Abstract] |
Schedule II - Valuation and Qualifying Accounts | Schedule II: Valuation and Qualifying Accounts (in thousands)
|  |  |  |  |  | Charged |  |  | Charged |  |  |  |  |  |  |  |  |
|  | Balance at |  |  | (Credited) |  |  | to Other |  |  |  |  |  |  |  |  |
|  | Beginning of |  |  | to Statement |  |  | Accounts - |  |  | Deductions, |  |  | Balance at |
|  | Year |  |  | of Operation |  |  | Equity |  |  | Net |  |  | End of Year |
Valuation allowances for deferred tax assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Year ended December 31, 2017 |  | $ | 128,995 |  |  | $ | 11,039 |  |  | $ | 19,506 |  |  | $ | — |  |  | $ | 159,540 |
Year ended December 31, 2016 |  | $ | 116,718 |  |  | $ | 12,277 |  |  | $ | — |  |  | $ | — |  |  | $ | 128,995 |
Year ended December 31, 2015 |  | $ | 94,731 |  |  | $ | 21,987 |  |  | $ | — |  |  | $ | — |  |  | $ | 116,718 |

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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 -URI http://asc.fasb.org/topic&trid=2122369 + Details
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- References No definition available. + Details
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