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STOCKHOLDERS' EQUITY (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares available for future awards (in shares) 4,295,152   4,295,152  
Weighted average grant date fair value [Abstract]        
Unrecognized compensation cost related to non-vested shares $ 7,047 $ 6,883 $ 7,047 $ 6,883
Weighted-average period of recognition for unrecognized compensation cost     1 year 7 months 6 days  
Estimated share-based compensation expense for current fiscal year 3,800   3,800  
Stock splits and repurchase of common stock        
Number of shares authorized to be repurchased (in shares) 3,763,038   3,763,038  
Number of shares acquired under the stock repurchase plan and subsequently reissued (in shares)     2,055,434  
Number of shares acquired under stock repurchase plan (in shares) 1,266   1,266  
Treasury stock acquired, average cost (in dollars per share)     $ 44.13  
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Impact of compensation cost on net earnings (573) (620) (1,243) (1,231)
Cost of Sales [Member]
       
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Impact of compensation cost on earnings component 152 145 304 289
Operating Expenses [Member]
       
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Impact of compensation cost on earnings component 753 827 1,677 1,657
Stock Options [Member]
       
Weighted Average Assumptions [Abstract]        
Dividend yield (in hundredths)     0.50% 0.50%
Expected volatility (in hundredths)     39.00% 41.00%
Risk-free interest rate (in hundredths)     1.00% 0.80%
Expected term     5 years 4 years 7 months 6 days
Vesting period     3 years  
Stock Option Activity [Abstract]        
Outstanding at beginning of period (in shares)     2,543,000 2,514,000
Granted (in shares)     172,000 225,000
Exercised (in shares)     (402,000) (92,000)
Forfeited (in shares)     (31,000) (5,000)
Outstanding at end of period (in shares) 2,282,000 2,642,000 2,282,000 2,642,000
Exercisable at end of period (in shares) 1,802,000 2,068,000 1,802,000 2,068,000
Weighted Average Exercise Price [Abstract]        
Outstanding at beginning of period (in dollars per share)     $ 16.87 $ 14.68
Granted (in dollars per share)     $ 38.35 $ 29.11
Exercised (in dollars per share)     $ 12.65 $ 9.52
Forfeited (in dollars per share)     $ 33.88 $ 28.87
Outstanding at end of period (in dollars per share) $ 19.01 $ 16.06 $ 19.01 $ 16.06
Exercisable, end of period (in dollars per share) $ 15.11 $ 12.51 $ 15.11 $ 12.51
Aggregate intrinsic value, outstanding, beginning of period     49,845 65,043
Aggregate intrinsic value, outstanding, end of period 58,749 43,855 58,749 43,855
Aggregate intrinsic value, exercisable, end of period 53,425 41,588 53,425 41,588
Weighted average remaining contractual term, outstanding     5 years 2 months 12 days 5 years 4 months 24 days
Weighted average remaining contractual term, exercisable     4 years 2 months 12 days 4 years 6 months
Weighted-average fair value of options granted (in dollars per share) $ 15.58 $ 10.37 $ 12.94 $ 9.75
Total intrinsic value of stock options exercised $ 6,887 $ 411 $ 11,984 $ 2,590
Non-vested restricted stock [Roll Forward]        
Non-vested balance as of beginning of year (in shares)     258,000 354,000
Granted (in shares)     21,000 44,000
Vested (in shares)     (3,000) (80,000)
Forfeited (in shares)     (24,000)  
Non-vested balance as of end of year (in shares) 252,000 318,000 252,000 318,000
Weighted average grant date fair value [Abstract]        
Non-vested balance as of beginning of year (in dollars per share)     $ 26.88 $ 18.77
Granted (in dollars per share)     $ 38.10 $ 29.06
Vested (in dollars per share)     $ 35.79 $ 13.72
Forfeited (in dollars per share)     $ 31.97  
Non-vested balance as of end of year (in dollars per share) $ 27.18 $ 21.48 $ 27.18 $ 21.48
Minimum [Member] | Restricted Stock [Member] | Employee [Member]
       
Weighted Average Assumptions [Abstract]        
Vesting period     90 days  
Minimum [Member] | Restricted Stock [Member] | Non-employee Director [Member]
       
Weighted Average Assumptions [Abstract]        
Vesting period     4 years  
Maximum [Member] | Restricted Stock [Member] | Employee [Member]
       
Weighted Average Assumptions [Abstract]        
Vesting period     4 years  
Maximum [Member] | Restricted Stock [Member] | Non-employee Director [Member]
       
Weighted Average Assumptions [Abstract]        
Vesting period     7 years  
ISO Plan [Member] | Stock Options [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Expiration period of options granted     10 years