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Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Allowance for doubtful accounts: |  |  |
Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance Beginning of Year | $ 4,246 | $ 4,338 | $ 1,885
Acquired Balances | 0 | 0 | 0
Charged to Expense | 1,265 | 1,710 | 3,785
Deductions | (1,750) | (1,802) | (1,332)
Balance End of Year | 3,761 | 4,246 | 4,338
Deferred income tax asset valuation allowance: |  |  |
Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance Beginning of Year | 1,274 | 1,213 | 1,334
Additions | (222) | 75 | 168
Charged to Expense | (313) | 158 |
Deductions | 0 | (14) | (289)
Balance End of Year | $ 1,052 | $ 1,274 | $ 1,213

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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 -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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