STOCKHOLDERS' EQUITY (Details) (USD $) | 3 Months Ended |
In Thousands, except Share data, unless otherwise specified | 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 | |