during the second quarter of 2013 , the company adopted updated income tax guidance , and as a result , reclassified as of december 31 , 2012 $ 74360 of unrecognized tax benefit from other long-term liabilities to deferred income taxes to conform to the current presentation in the accompanying consolidated balance sheets . the total balance in the table above does not include interest and penalties of $ 242 and $ 260 as of december 31 , 2013 and 2012 , respectively , which is recorded as a component of income tax expense . the majority of the increased tax position is attributable to temporary differences . the increase in 2013 current period tax positions related primarily to the company 2019s change in tax accounting method filed in 2008 for repair and maintenance costs on its utility assets . the company does not anticipate material changes to its unrecognized tax benefits within the next year . if the company sustains all of its positions at december 31 , 2013 and 2012 , an unrecognized tax benefit of $ 7439 and $ 7532 , respectively , excluding interest and penalties , would impact the company 2019s effective tax rate. .
the company had capital loss carryforwards for federal income tax purposes of $ 3844 and $ 4357 at december 31 , 2013 and 2012 , respectively . the company has recognized a full valuation allowance for the capital loss carryforwards because the company does not believe these losses are more likely than not to be recovered . the company files income tax returns in the united states federal jurisdiction and various state and foreign jurisdictions . with few exceptions , the company is no longer subject to u.s . federal , state or local or non-u.s income tax examinations by tax authorities for years before 2007 . the company has state income tax examinations in progress and does not expect material adjustments to result . the patient protection and affordable care act ( the 201cppaca 201d ) became law on march 23 , 2010 , and the health care and education reconciliation act of 2010 became law on march 30 , 2010 , which makes various amendments to certain aspects of the ppaca ( together , the 201cacts 201d ) . the ppaca effectively changes the tax treatment of federal subsidies paid to sponsors of retiree health benefit plans that provide a benefit that is at least actuarially equivalent to the benefits under medicare part d . the acts effectively make the subsidy payments taxable in tax years beginning after december 31 , 2012 and as a result , the company followed its original accounting for the underfunded status of the other postretirement benefits for the medicare part d adjustment and recorded a reduction in deferred tax assets and an increase in its regulatory assets amounting to $ 6241 and $ 6432 at december 31 , 2013 and 2012 , respectively . the following table summarizes the changes in the company 2019s gross liability , excluding interest and penalties , for unrecognized tax benefits: .
what is awk's 2012 unrecognized tax benefit as a percentage of gross liabilities?
balance at january 1 2012 the balance at december 31 2012 of $ 158578 is $ 180993 ; if the company sustains all of its positions at december 31 , 2013 and 2012 , an unrecognized tax benefit of $ 7439 and $ 7532 , respectively , excluding interest and penalties , would impact the company 2019s effective tax rate. .
balance at january 1 2012 $ 158578
increases in current period tax positions 40620
decreases in prior period measurement of tax positions -18205 ( 18205 )
balance at december 31 2012 $ 180993
increases in current period tax positions 27229
decreases in prior period measurement of tax positions -30275 ( 30275 )
balance at december 31 2013 $ 177947