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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 | Valuation and Qualifying Accounts
(Dollars in thousands) |  | Balance at Beginning of Period |  | Charged to (Reduction of) Costs and Expenses |  | Taken Against Allowance |  | Other (Deductions) Recoveries |  | Balance at End of Period
Allowance for Doubtful Accounts |  |  |  |  |  |  |  |  |  |
December 31, 2017 |  | $ | 1,952 |  |  | $ | (275 | ) |  | $ | (152 | ) |  | $ | — |  |  | $ | 1,525 |
December 31, 2016 |  | $ | 695 |  |  | $ | 1,321 |  |  | $ | (64 | ) |  | $ | — |  |  | $ | 1,952 |
December 31, 2015 |  | $ | 476 |  |  | $ | 1,085 |  |  | $ | (866 | ) |  | $ | — |  |  | $ | 695 |
(Dollars in thousands) |  | Balance at Beginning of Period |  | Charged to (Reduction of) Costs and Expenses |  | Taken Against Allowance |  | Other (Deductions) Recoveries |  | Balance at End of Period
Valuation on Allowance for Deferred Tax Assets |  |  |  |  |  |  |  |  |  |
December 31, 2017 |  | $ | 6,388 |  |  | $ | 2,366 |  |  | $ | — |  |  | $ | — |  |  | $ | 8,754 |
December 31, 2016 |  | $ | 6,202 |  |  | $ | 186 |  |  | $ | — |  |  | $ | — |  |  | $ | 6,388 |
December 31, 2015 |  | $ | 7,691 |  |  | $ | (1,484 | ) |  | $ | — |  |  | $ | (5 | ) |  | $ | 6,202 |

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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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