Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	Jan. 31, 2016	Jan. 31, 2015
Allowance for doubtful accounts receivable, current	$ 3,826	$ 4,217
Common stock, no par value	$ 0	$ 0
Common stock, shares authorized	300,000	300,000
Common stock, shares issued	114,934	115,790
Common stock, shares outstanding	114,934	115,790