pre_text: advance auto parts , inc . schedule ii - valuation and qualifying accounts ( in thousands ) allowance for doubtful accounts receivable : balance at beginning of period charges to expenses deductions balance at end of period january 3 , 2015 $ 13295 $ 17182 $ ( 14325 ) ( 1 ) $ 16152 january 2 , 2016 16152 22067 ( 12461 ) ( 1 ) 25758 december 31 , 2016 25758 24597 ( 21191 ) ( 1 ) 29164 ( 1 ) accounts written off during the period . these amounts did not impact the company 2019s statement of operations for any year presented . note : other valuation and qualifying accounts have not been reported in this schedule because they are either not applicable or because the information has been included elsewhere in this report. .
post_text: advance auto parts , inc . schedule ii - valuation and qualifying accounts ( in thousands ) allowance for doubtful accounts receivable : balance at beginning of period charges to expenses deductions balance at end of period january 3 , 2015 $ 13295 $ 17182 $ ( 14325 ) ( 1 ) $ 16152 january 2 , 2016 16152 22067 ( 12461 ) ( 1 ) 25758 december 31 , 2016 25758 24597 ( 21191 ) ( 1 ) 29164 ( 1 ) accounts written off during the period . these amounts did not impact the company 2019s statement of operations for any year presented . note : other valuation and qualifying accounts have not been reported in this schedule because they are either not applicable or because the information has been included elsewhere in this report. .
table: Allowance for doubtful accounts receivable: Balance atBeginningof Period Charges toExpenses Deductions Balance atEnd ofPeriod
table: January 3, 2015 $13,295 $17,182 $(14,325) <sup>(1)</sup> $16,152
table: January 2, 2016 16,152 22,067 (12,461) <sup>(1)</sup> 25,758
table: December 31, 2016 25,758 24,597 (21,191) <sup>(1)</sup> 29,164
question: Analyse this data from a financial earnings document. what is the net increase in the balance of allowance for doubtful accounts receivable during 2015?