STOCKHOLDERS' EQUITY: Changes in Equity (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 6 Months Ended
May 31, 2014
May 31, 2013
May 31, 2014
May 31, 2013
Schedule of Capitalization, Equity [Line Items]        
Stockholders' equity, Beginning balance     $ 1,411,641 $ 1,319,355
Issuance of common stock on exercise of options     3,809 3,088
Issuance of common stock for employee stock purchase plan     789 710
Tax benefit from employee stock plans     2,806 1,555
Taxes paid for the settlement of equity awards     (1,710) (153)
Shares and employee stock awards issued for acquisition of IBM customer care business     71,106 0
Share based compensation     5,632 4,698
Repurchase of Treasury Stock     0 (1,882)
Conversion premium of convertible debt, net of tax     0 (21,745)
Net Income 39,579 30,792 78,037 64,183
Change in unrealized gains on available-for-sale securities 230 (51) 262 188
Change in unrealized gain in defined benefit plans, net of tax 114 0 114 0
Net change in unrealized loss on cash flow hedges     (157) 0
Foreign currency translation adjustments 11,199 (2,999) 9,097 (13,961)
Other comprehensive income (loss) 11,393 (3,050) 9,316 (13,773)
Comprehensive income: 50,972 27,742 87,353 50,410
Stockholders' equity, ending balance 1,581,426 1,356,036 1,581,426 1,356,036
Parent [Member]
        
Schedule of Capitalization, Equity [Line Items]        
Stockholders' equity, Beginning balance     1,411,222 1,319,023
Issuance of common stock on exercise of options     3,809 3,088
Issuance of common stock for employee stock purchase plan     789 710
Tax benefit from employee stock plans     2,806 1,555
Taxes paid for the settlement of equity awards     (1,710) (153)
Shares and employee stock awards issued for acquisition of IBM customer care business     71,106 0
Share based compensation     5,632 4,698
Repurchase of Treasury Stock     0 (1,882)
Conversion premium of convertible debt, net of tax     0 (21,745)
Net Income     77,968 64,138
Change in unrealized gains on available-for-sale securities     261 188
Change in unrealized gain in defined benefit plans, net of tax     114 0
Net change in unrealized loss on cash flow hedges     (157) 0
Foreign currency translation adjustments     9,096 (13,949)
Other comprehensive income (loss)     9,314 (13,761)
Comprehensive income:     87,282 50,377
Stockholders' equity, ending balance 1,580,936 1,355,671 1,580,936 1,355,671
Noncontrolling Interest [Member]
        
Schedule of Capitalization, Equity [Line Items]        
Stockholders' equity, Beginning balance     419 332
Issuance of common stock on exercise of options     0 0
Issuance of common stock for employee stock purchase plan     0 0
Tax benefit from employee stock plans     0 0
Taxes paid for the settlement of equity awards     0 0
Shares and employee stock awards issued for acquisition of IBM customer care business     0 0
Share based compensation     0 0
Repurchase of Treasury Stock     0 0
Conversion premium of convertible debt, net of tax     0 0
Net Income     69 45
Change in unrealized gains on available-for-sale securities     1 0
Change in unrealized gain in defined benefit plans, net of tax     0 0
Net change in unrealized loss on cash flow hedges     0 0
Foreign currency translation adjustments     1 (12)
Other comprehensive income (loss)     2 (12)
Comprehensive income:     71 33
Stockholders' equity, ending balance $ 490 $ 365 $ 490 $ 365