Using the following amounts (in thousands) reported in Zebra Technologies consolidated balance sheets and statements of income at December 31, 2013 and 2012, and the valuation schedule, analyze the accounts receivable and allowance accounts for all years.

2013 2012 Net Sales $1,038,159 $996,168 176,917 $168,732 Schedule II-Valuation and Qualifying Accounts Years Ended December 31, 2013 Accounts receivable, net of allowances for doubtful accounts of $453 in 2013 and $669 in 2012 and 2012 Balance at Beginning of Period Charged to Costs and Expenses Balance of Period $ 453 $ 669 $1,560 at End 2013 Allowance for 2012 Allowance for 2011 Allowance for $ 669 $1,560 $1,459 Deductions $589 $891 $242 373 doubtful accounts doubtful accounts doubtful accounts 343