STOCKHOLDERS' EQUITY (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for future awards (in shares)	3,825,592
Weighted average grant date fair value [Abstract]
Unrecognized compensation cost related to non-vested shares	$ 10,622	$ 8,259
Weighted-average period of recognition for unrecognized compensation cost	1 year 9 months 18 days
Estimated share-based compensation expense for current fiscal year	4,700
Stock splits and repurchase of common stock
Number of shares authorized to be repurchased (in shares)	3,763,038
Number of shares acquired under the stock repurchase plan and subsequently reissued (in shares)	2,105,231
Number of shares acquired under stock repurchase plan (in shares)	0
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Impact of compensation cost on net earnings	(760)	(653)
Cost of Sales [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Impact of compensation cost on earnings component	212	148
Operating Expenses [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Impact of compensation cost on earnings component	962	840
Stock Options [Member]
Weighted Average Assumptions [Abstract]
Dividend yield (in hundredths)	0.60%	0.60%
Expected volatility (in hundredths)	33.00%	33.00%
Risk-free interest rate (in hundredths)	1.80%	1.70%
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)	197,000	158,000
Exercised (in shares)	(192,000)	(125,000)
Forfeited (in shares)	(1,000)	(13,000)
Outstanding at end of period (in shares)	1,474,000	1,913,000
Exercisable at end of period (in shares)	1,040,000	1,504,000
Weighted Average Exercise Price [Abstract]
Outstanding at beginning of period (in dollars per share)	$ 27.35	$ 20.94
Granted (in dollars per share)	$ 58.52	$ 50.57
Exercised (in dollars per share)	$ 16.52	$ 10.60
Forfeited (in dollars per share)	$ 45.08	$ 43.10
Outstanding at end of period (in dollars per share)	$ 32.93	$ 23.92
Exercisable, end of period (in dollars per share)	$ 24.75	$ 19.28
Aggregate Intrinsic Value, Outstanding, beginning of period	57,742	71,465
Aggregate Intrinsic Value, Outstanding, end of period	33,736	53,946
Aggregate Intrinsic Value, Exercisable, end of period	31,849	49,392
Weighted Average Remaining Contractual Term, Outstanding	6 years 2 months 12 days	5 years 7 months 6 days
Weighted Average Remaining Contractual Term, Exercisable	4 years 10 months 24 days	4 years 8 months 12 days
Weighted-average fair value of options granted (in dollars per share)	$ 18.42	$ 15.98
Total intrinsic value of stock options exercised	$ 8,039	$ 5,418
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)	19,000	20,000
Vested (in shares)	(10,000)	(2,000)
Forfeited (in shares)	0	(2,000)
Non-vested balance as of end of period (in shares)	143,000	188,000
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)	$ 58.52	$ 50.49
Vested (in dollars per share)	$ 14.37	$ 35.79
Forfeited (in dollars per share)	$ 0	$ 32.70
Non-vested balance as of end of period (in dollars per share)	$ 42.53	$ 35.42
Restricted Stock [Member] | Employee [Member]
Weighted Average Assumptions [Abstract]
Vesting period	4 years
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
Non-vested restricted stock [Roll Forward]
Granted (in shares)	24,010
Weighted average grant date fair value [Abstract]
Granted (in dollars per share)	$ 58.78
Initial TSR (in hundredths)	(6.90%)
Cliff vest (in hundredths)	100.00%
Minimum [Member] | Restricted Stock [Member] | Non-employee Director [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]
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