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Schedule II - Valuation Accounts | 12 Months Ended
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Dec. 31, 2017
Valuation and Qualifying Accounts [Abstract] |
Schedule II - Valuation Accounts | Schedule II Valuation Accounts Allowance for Doubtful Accounts (in thousands)
| Fiscal Year Ended December 31,
2017 |  | 2016 |  | 2015
Balance at beginning of period | $ | 1,069 |  |  | $ | 988 |  |  | $ | 2,153 |
Additions—charged to expense | 290 |  |  | 1,107 |  |  | 1,344 |
Deductions—bad debts written off, net of recoveries | (550 | ) |  | (1,026 | ) |  | (2,509 | )
Balance at end of period | $ | 809 |  |  | $ | 1,069 |  |  | $ | 988 |

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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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