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STOCKHOLDERS' EQUITY: Share Repurchase Program (Details) - USD ($)
shares in Thousands, $ in Thousands
1 Months Ended
Jun. 30, 2014
Jun. 30, 2011
Nov. 30, 2015
Nov. 30, 2014
Equity, Class of Treasury Stock [Line Items]        
Treasury stock, shares     1,161 923
Treasury stock, value     $ 51,287 $ 32,723
2011 Repurchase Program [Member]        
Equity, Class of Treasury Stock [Line Items]        
Share repurchase program, period in force (in years)   3 years    
Share repurchase program, authorized amount   $ 65,000    
Treasury stock, shares       361
Treasury stock, value       $ 11,340
2014 Repurchase Program [Member]        
Equity, Class of Treasury Stock [Line Items]        
Share repurchase program, period in force (in years) 3 years      
Share repurchase program, authorized amount $ 100,000      
Treasury stock, shares     120  
Treasury stock, value     $ 8,736