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Consolidated Statements of Shareholders' Equity - USD ($)
$ in Thousands
Total
Common Stock [Member]
Additional Paid-in Capital [Member]
AOCI Attributable to Parent [Member]
Retained Earnings [Member]
Balance at Jan. 31, 2015   $ 247,839 $ 450,623 $ (25,212) $ (282,865)
Stock options and share units exercised   4,632      
Acquisitions (Note 3)        
Balance at Jan. 31, 2016 $ 402,035 252,471 446,747 (34,880) (262,303)
Stock-based compensation expense (Note 16)     1,577    
Stock options and share units exercised     (68)    
Settlement of stock options (Note 16)     (7,000)    
Stock option income tax benefits     1,615    
Other comprehensive income (loss), net of income taxes       (9,668)  
Net income 20,562       20,562
Cumulative adjustment upon modified retrospective accounting policy adoption (Note 2)      
Stock options and share units exercised   771      
Acquisitions (Note 3)        
Balance at Jan. 31, 2017 430,595 253,242 448,597 (32,779) (238,465)
Stock-based compensation expense (Note 16)     2,022    
Stock options and share units exercised     (205)    
Settlement of stock options (Note 16)        
Stock option income tax benefits     33    
Other comprehensive income (loss), net of income taxes       2,101  
Net income 23,838       23,838
Cumulative adjustment upon modified retrospective accounting policy adoption (Note 2)      
Stock options and share units exercised   1,294      
Acquisitions (Note 3)   20,000      
Balance at Jan. 31, 2018 498,812 $ 274,536 451,151 (15,252) (211,623)
Stock-based compensation expense (Note 16)     2,807    
Stock options and share units exercised     (290)    
Settlement of stock options (Note 16)        
Stock option income tax benefits        
Other comprehensive income (loss), net of income taxes       $ 17,527  
Net income $ 26,879       26,879
Cumulative adjustment upon modified retrospective accounting policy adoption (Note 2)     $ 37   $ (37)