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STOCKHOLDERS' EQUITY (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares available for future awards (in shares) 3,772,007   3,772,007  
Weighted average grant date fair value [Abstract]        
Unrecognized compensation cost related to non-vested shares $ 12,146 $ 7,158 $ 12,146 $ 7,158
Weighted-average period of recognition for unrecognized compensation cost     2 years  
Estimated share-based compensation expense for current fiscal year $ 5,700   $ 5,700  
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 (in shares)     2,105,601  
Number of shares acquired under stock repurchase plan and subsequently reissued (in shares)     370  
Treasury stock acquired, average cost (in dollars per share)     $ 56.85  
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Impact of compensation cost on net earnings $ (982) $ (847) $ (1,743) $ (1,499)
Stock Options [Member]        
Weighted Average Assumptions [Abstract]        
Dividend yield (in hundredths)     0.60% 0.50%
Expected volatility (in hundredths)     33.00% 34.00%
Risk-free interest rate (in hundredths)     1.70% 1.80%
Expected term     5 years 6 months 5 years 7 months 6 days
Vesting period 3 years      
Stock Option Activity [Abstract]        
Outstanding at beginning of period (in shares)     1,470,000 1,893,000
Granted (in shares)     207,000 268,000
Exercised (in shares)     (519,000) (249,000)
Forfeited (in shares)     (12,000) (126,000)
Outstanding at end of period (in shares) 1,146,000 1,786,000 1,146,000 1,786,000
Exercisable at end of period (in shares) 718,000 1,425,000 718,000 1,425,000
Weighted Average Exercise Price [Abstract]        
Outstanding at beginning of period (in dollars per share)     $ 27.35 $ 20.94
Granted (in dollars per share)     58.34 53.80
Exercised (in dollars per share)     19.12 11.56
Forfeited (in dollars per share)     50.46 56.03
Outstanding at end of period (in dollars per share) $ 36.45 $ 24.71 36.45 24.71
Exercisable, end of period (in dollars per share) $ 26.77 $ 20.40 $ 26.77 $ 20.40
Aggregate Intrinsic Value, Outstanding, beginning of period     $ 57,742 $ 71,465
Aggregate Intrinsic Value, Outstanding, end of period $ 22,660 $ 51,517 22,660 51,517
Aggregate Intrinsic Value, Exercisable, end of period $ 20,785 $ 47,250 $ 20,785 $ 47,250
Weighted Average Remaining Contractual Term, Outstanding     6 years 7 months 6 days 5 years 3 months 18 days
Weighted Average Remaining Contractual Term, Exercisable     5 years 2 months 12 days 4 years 4 months 24 days
Weighted-average fair value of options granted (in dollars per share) $ 17.07 $ 19.68 $ 18.35 $ 17.53
Total intrinsic value of stock options exercised $ 12,244 $ 5,526 $ 20,284 $ 10,944
Restricted Stock [Member]        
Non-vested restricted stock [Roll Forward]        
Non-vested balance as of beginning of period (in shares)     134,000 172,000
Granted (in shares)     76,000 25,000
Vested (in shares)     (11,000) (24,000)
Forfeited (in shares)     0 (6,000)
Non-vested balance as of end of period (in shares) 199,000 167,000 199,000 167,000
Weighted average grant date fair value [Abstract]        
Non-vested balance as of beginning of period (in dollars per share)     $ 38.13 $ 33.69
Granted (in dollars per share)     55.77 51.03
Vested (in dollars per share)     16.69 37.61
Forfeited (in dollars per share)     0 45.32
Non-vested balance as of end of period (in dollars per share) $ 46.11 $ 35.27 $ 46.11 $ 35.27
Restricted Stock [Member] | Employee [Member]        
Weighted Average Assumptions [Abstract]        
Vesting period 4 years      
Restricted Stock [Member] | Non-employee Director [Member]        
Weighted Average Assumptions [Abstract]        
Vesting period 4 years      
Performance Shares [Member]        
Non-vested restricted stock [Roll Forward]        
Non-vested balance as of beginning of period (in shares)     0 0
Granted (in shares)     29,000 0
Vested (in shares)     0 0
Forfeited (in shares)     9,000 0
Non-vested balance as of end of period (in shares) 20,000 0 20,000 0
Weighted average grant date fair value [Abstract]        
Non-vested balance as of beginning of period (in dollars per share)     $ 0 $ 0
Granted (in dollars per share)     58.77 0
Vested (in dollars per share)     0 0
Forfeited (in dollars per share)     58.77 0
Non-vested balance as of end of period (in dollars per share) $ 58.77 $ 0 $ 58.77 $ 0
Performance Shares [Member] | Employee [Member]        
Weighted Average Assumptions [Abstract]        
Dividend yield (in hundredths)     0.50%  
Expected volatility (in hundredths)     34.00%  
Risk-free interest rate (in hundredths)     1.00%  
Vesting period 3 years      
Weighted average grant date fair value [Abstract]        
Initial TSR (in hundredths)     (6.90%)  
Cliff vest (in hundredths)     100.00%  
ISO Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Expiration period of options granted 10 years      
Non-Qualified Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Expiration period of options granted 10 years      
Cost of Sales [Member]        
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Impact of compensation cost on earnings component $ 214 $ 163 $ 426 $ 311
Operating Expenses [Member]        
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Impact of compensation cost on earnings component $ 1,298 $ 1,196 $ 2,260 $ 2,036