XML 81 R53.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Income taxes - Schedule of Valuation Allowances (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Deferred Tax Assets, Valuation Allowance [Roll Forward] |  |  |
Beginning at beginning of period | $ 125,894 | $ 136,418 | $ 209,939
Additions to valuation allowance | 9,545 | 3,908 | 40,180
Reductions to valuation allowance | (89,778) | (14,432) | (113,701)
Balance at the end of the period | $ 45,661 | $ 125,894 | $ 136,418

X
- Definition Deferred Tax Asset, Valuation Allowance, Additions + References No definition available. + Details
Name: | tgna_DeferredTaxAssetValuationAllowanceAdditions
Namespace Prefix: | tgna_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Deferred Tax Asset, Valuation Allowance, Reductions + References No definition available. + Details
Name: | tgna_DeferredTaxAssetsValuationAllowanceReductions
Namespace Prefix: | tgna_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Deferred Tax Assets, Valuation Allowance [Roll Forward] + References No definition available. + Details
Name: | tgna_DeferredTaxAssetsValuationAllowanceRollForward
Namespace Prefix: | tgna_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
Name: | us-gaap_DeferredTaxAssetsValuationAllowance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant