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Income Taxes - Schedule of Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] |  |  |
Unrecognized Tax Benefits, Beginning Balance | $ 2,195 | $ 943 | $ 1,919
Additions for tax positions taken in prior years | 43 | 1,295 | 43
Reductions for tax positions taken in prior years |  |  | (666)
Reductions for lapse of applicable statutes | (813) | (43) | (353)
Unrecognized Tax Benefits, Ending Balance | 1,425 | 2,195 | 943
Continuing Operations |  |  |
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] |  |  |
Unrecognized Tax Benefits, Beginning Balance | 1,559 | 307 | 1,283
Additions for tax positions taken in prior years | 43 | 1,295 | 43
Reductions for tax positions taken in prior years |  |  | (666)
Reductions for lapse of applicable statutes | (177) | (43) | (353)
Unrecognized Tax Benefits, Ending Balance | 1,425 | 1,559 | 307
Discontinued Operations |  |  |
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] |  |  |
Unrecognized Tax Benefits, Beginning Balance | 636 | 636 | 636
Additions for tax positions taken in prior years | 0 | 0 | 0
Reductions for tax positions taken in prior years |  |  | 0
Reductions for lapse of applicable statutes | (636) | 0 | 0
Unrecognized Tax Benefits, Ending Balance | $ 0 | $ 636 | $ 636

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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Amount of unrecognized tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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- Definition Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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- Definition Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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- Definition Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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