STOCKHOLDERS' EQUITY (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for future awards (in shares)	3,770,007		3,770,007
Weighted average grant date fair value [Abstract]
Unrecognized compensation cost related to non-vested shares	$ 9,239	$ 6,537	$ 9,239	$ 6,537
Weighted-average period of recognition for unrecognized compensation cost			2 years
Estimated share-based compensation expense for current fiscal year	$ 7,000		$ 7,000
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)			2,124,834
Number of shares acquired under stock repurchase plan and subsequently reissued (in shares)			19,603
Treasury stock acquired, average cost (in dollars per share)			$ 57.69
Treasury stock remaining (in shares)			3,595
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Impact of compensation cost on net earnings	$ (1,904)	$ (690)	$ (3,647)	$ (2,189)
Stock Options [Member]
Weighted Average Assumptions [Abstract]
Dividend yield			0.60%	0.50%
Expected volatility			33.00%	34.00%
Risk-free interest rate			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)			209,000	313,000
Exercised (in shares)			(603,000)	(456,000)
Forfeited (in shares)			(12,000)	(126,000)
Outstanding at end of period (in shares)	1,064,000	1,624,000	1,064,000	1,624,000
Exercisable at end of period (in shares)	690,000	1,220,000	690,000	1,220,000
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	53.38
Exercised (in dollars per share)			19.73	14.49
Forfeited (in dollars per share)			50.46	56.03
Outstanding at end of period (in dollars per share)	$ 37.52	$ 26.29	37.52	26.29
Exercisable, end of period (in dollars per share)	$ 29.23	$ 20.83	$ 29.23	$ 20.83
Aggregate intrinsic value, outstanding, beginning of period			$ 57,742	$ 71,465
Aggregate intrinsic value, outstanding, end of period	$ 24,747	$ 49,192	24,747	49,192
Aggregate intrinsic value, exercisable, end of period	$ 21,773	$ 43,583	$ 21,773	$ 43,583
Weighted average remaining contractual term, outstanding			6 years 1 month 6 days	5 years 7 months 6 days
Weighted average remaining contractual term, exercisable			4 years 7 months 6 days	4 years 7 months 6 days
Weighted-average fair value of options granted (in dollars per share)	$ 18.13	$ 16.38	$ 18.35	$ 17.36
Total intrinsic value of stock options exercised	$ 2,944	$ 7,241	$ 23,229	$ 18,185
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)			(48,000)	(24,000)
Forfeited (in shares)			0	(6,000)
Non-vested balance as of end of period (in shares)	162,000	167,000	162,000	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)			36.34	37.61
Forfeited (in dollars per share)			0	45.32
Non-vested balance as of end of period (in dollars per share)	$ 47.01	$ 35.27	$ 47.01	$ 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			0.50%
Expected volatility			34.00%
Risk-free interest rate			1.00%
Vesting period			3 years
Weighted average grant date fair value [Abstract]
Initial TSR			(6.90%)
Cliff vest			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	$ 141	$ 640	$ 452
Operating Expenses [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Impact of compensation cost on earnings component	$ 2,756	$ 961	$ 5,016	$ 2,997