STOCKHOLDERS' EQUITY (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Impact of compensation cost on net earnings	$ (620)	$ (564)	$ (1,231)	$ (1,212)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for future awards (in shares)	4,521,024		4,521,024
Weighted average grant date fair value [Roll Forward]
Unrecognized compensation cost related to non-vested share-based compensation arrangements	6,883	6,545	6,883	6,545
Weighted-average period for unrecognized compensation			1 year 3 months 18 days
Estimated share-based compensation expense for current fiscal year	3,900		3,900
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)	2,033,700		2,033,700
Number of shares acquired under stock repurchase plan (in shares)			23,212
Treasury stock acquired, average cost (in dollars per share)			$ 41.53
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			3 years
Option activity, shares [Roll Forward]
Outstanding at beginning of period (in shares)			2,514,000	2,955,000
Granted (in shares)			225,000	14,000
Exercised (in shares)			(92,000)	(195,000)
Forfeited (in shares)			(5,000)	(50,000)
Outstanding at end of period (in shares)	2,642,000	2,724,000	2,642,000	2,724,000
Exercisable at end of period (in shares)	2,068,000	2,037,000	2,068,000	2,037,000
Option activity, weighted average exercise price [Roll Forward]
Outstanding at end of period (in dollars per share)			$ 14.68	$ 14.21
Granted (in dollars per share)			$ 29.11	$ 40.10
Exercised (in dollars per share)			$ 9.52	$ 11.85
Forfeited (in dollars per share)			$ 28.87	$ 24.47
Outstanding at end of period (in dollars per share)	$ 16.06	$ 14.32	$ 16.06	$ 14.32
Exercisable, end of period (in dollars per share)	$ 12.51	$ 10.67	$ 12.51	$ 10.67
Options, additional disclosures [Abstract]
Aggregate intrinsic value, outstanding, beginning of period			65,043	57,930
Aggregate intrinsic value, outstanding, end of period	43,855	80,246	43,855	80,246
Aggregate intrinsic value, exercisable, end of period	41,588	67,422	41,588	67,422
Weighted average remaining contractual term, outstanding			5 years 4 months 24 days	5 years 10 months 24 days
Weighted average remaining contractual term, exercisable			4 years 6 months	5 years
Weighted-average fair value of options granted (in dollars per share)	$ 10.37	$ 12.43	$ 9.75	$ 12.25
Total intrinsic value of stock options exercised	411	3,187	2,590	5,129
Weighted Average Assumptions [Abstract]
Dividend yields (in hundredths)			0.50%	0.50%
Expected volatilities (in hundredths)			41.00%	36.00%
Risk-free interest rates (in hundredths)			0.80%	1.40%
Expected lives			4 years 7 months 6 days	4 years 6 months
Restricted Stock [Member]
Non-vested restricted stock activity [Roll Forward]
Non-vested balance as of beginning of period (in shares)			354,000	363,000
Granted (in shares)			44,000	1,000
Vested (in shares)			(80,000)	(7,000)
Forfeited (in shares)				(17,000)
Non-vested balance as of end of period (in shares)	318,000	340,000	318,000	340,000
Weighted average grant date fair value [Roll Forward]
Non-vested balance as of beginning of period (in dollars per share)			$ 18.77	$ 17.66
Granted (in dollars per share)			$ 29.06	$ 40.88
Vested (in dollars per share)			$ 13.72	$ 12.41
Forfeited (in dollars per share)				$ 19.12
Non-vested balance as of end of period (in dollars per share)	$ 21.48	$ 17.77	$ 21.48	$ 17.77
Restricted Stock [Member] \| Employee [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			4 years
Restricted Stock [Member] \| Non-employee Director [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			4 years
Restricted Stock [Member] \| Non-employee Director [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
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
Cost of Sales [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Impact of compensation cost on earnings component	145	146	289	291
Operating Expenses [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Impact of compensation cost on earnings component	$ 827	$ 759	$ 1,657	$ 1,643

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The amount of expense, net of income tax, recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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As of the balance sheet date, the aggregate unrecognized cost of equity-based awards made to employees under equity-based compensation awards that have yet to vest.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The total accumulated difference between fair values of underlying shares on dates of exercise and exercise price on options which were exercised (or share units converted) into shares during the reporting period under the plan.

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For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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Weighted average price of options that were either forfeited or expired.

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Net number of share options (or share units) granted during the period.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Weighted average price at which option holders acquired shares when converting their stock options into shares.

+ References

No definition available.

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- Definition

Weighted average price at which grantees can acquire the shares reserved for issuance on stock options awarded.

+ References

No definition available.

+ Details

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- Definition

Number of share options (or share units) exercised during the current period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.28,29)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iv)(2)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29, 30

-Article 5

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

-URI http://asc.fasb.org/extlink&oid=6959260&loc=d3e187085-122770

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- Definition

The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

+ References

No definition available.

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- Definition

Total cost of shares repurchased divided by the total number of shares repurchased.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 30

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 43

-Section B

-Paragraph 7

-Subparagraph b

-Chapter 1

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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