the principal components of eog's rollforward of valuation allowances for deferred income tax assets were as follows ( in thousands ) : .

Table:
 | 2017 | 2016 | 2015
beginning balance | $ 383221 | $ 506127 | $ 463018
increase ( 1 ) | 67333 | 37221 | 146602
decrease ( 2 ) | -13687 ( 13687 ) | -12667 ( 12667 ) | -4315 ( 4315 )
other ( 3 ) | 29554 | -147460 ( 147460 ) | -99178 ( 99178 )
ending balance | $ 466421 | $ 383221 | $ 506127
( 1 ) increase in valuation allowance related to the generation of tax nols and other deferred tax assets .
( 2 ) decrease in valuation allowance associated with adjustments to certain deferred tax assets and their related allowance .
( 3 ) represents dispositions/revisions/foreign exchange rate variances and the effect of statutory income tax rate changes .
as of december 31 , 2017 , eog had state income tax nols being carried forward of approximately $ 1.7 billion , which , if unused , expire between 2018 and 2036 .
during 2017 , eog's united kingdom subsidiary incurred a tax nol of approximately $ 72 million which , along with prior years' nols of $ 857 million , will be carried forward indefinitely .
eog also has united states federal and canadian nols of $ 335 million and $ 158 million , respectively , with varying carryforward periods .
eog's remaining amt credits total $ 798 million , resulting from amt paid with respect to prior years and an increase of $ 41 million in 2017 .
as described above , these nols and credits , as well as other less significant future income tax benefits , have been evaluated for the likelihood of utilization , and valuation allowances have been established for the portion of these deferred income tax assets that t do not meet the "more likely than not" threshold .
as further described above , significant changes were made by the tcja to the corporate amt that are favorable to eog , including the refunding of amt credit carryovers .
due to these legislative changes , eog intends to settle certain uncertain tax positions related to amt credits for taxable years 2011 through 2015 , resulting in a decrease of uncertain tax positions of $ 40 million .
the amount of unrecognized tax benefits at december 31 , 2017 , was $ 39 million , resulting from the tax treatment of its research and experimental expenditures related to certain innovations in its horizontal drilling and completion projects , which ish not expected to have an earnings impact .
eog records interest and penalties related to unrecognized tax benefits to its income tax provision .
eog does not anticipate that the amount of the unrecognized tax benefits will increase during the next twelve months .
eog and its subsidiaries file income tax returns and are subject to tax audits in the united states and various state , local and foreign jurisdictions .
eog's earliest open tax years in its principal jurisdictions are as follows : united states federal ( 2011 ) , canada ( 2014 ) , united kingdom ( 2016 ) , trinidad ( 2011 ) and china ( 2008 ) .
eog's foreign subsidiaries' undistributed earnings are no longer considered to be permanently reinvested outside the u.s .
and , accordingly , eog has cumulatively recorded $ 20 million of foreign and state deferred income taxes as of december 31 , 2017 .
7 .
employee benefit plans stock-based compensation during 2017 , eog maintained various stock-based compensation plans as discussed below .
eog recognizes compensation expense on grants of stock options , sars , restricted stock and restricted stock units , performance units and grants made under the eog resources , inc .
employee stock purchase plan ( espp ) .
stock-based compensation expense is calculated based upon the grant date estimated fair value of the awards , net of forfeitures , based upon eog's historical employee turnover rate .
compensation expense is amortized over the shorter of the vesting period or the period from date of grant until the date the employee becomes eligible to retire without company approval. .

Question: considering the eog's roll forward of valuation allowances for deferred income tax assets during 2015-2017 , what was the highest value registered in the beginning balance?
Answer: 506127
Calculation: table_max(beginning balance, none)