STOCKHOLDERS EQUITY (Details) (USD $)	12 Months Ended														12 Months Ended			1 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Employee Stock Purchase Plan	Dec. 31, 2013 Restricted stock awards	Dec. 31, 2012 Restricted stock awards	Dec. 31, 2011 Restricted stock awards	Dec. 31, 2013 SARs	Dec. 31, 2012 SARs	Dec. 31, 2011 SARs	Dec. 31, 2013 Performance Shares	Dec. 31, 2012 Performance Shares	Jan. 06, 2012 Performance Shares Anniversary	Jan. 06, 2012 Performance Shares Maximum	Dec. 31, 2013 Stock options and SARs	Dec. 31, 2012 Stock options and SARs	Dec. 31, 2011 Stock options and SARs	Jan. 31, 2005 1999 Plan and 2003 Plan Stock options	Dec. 31, 2013 1999 Plan and 2003 Plan Restricted stock awards Director	Dec. 31, 2013 1999 Plan and 2003 Plan Restricted stock awards Minimum	Dec. 31, 2013 1999 Plan and 2003 Plan Restricted stock awards Maximum	Dec. 31, 2013 1999 Plan and 2003 Plan Stock options and SARs	Dec. 31, 2013 2003 Plan	Dec. 31, 2013 2003 Plan Stock options
Stock based compensation
Maximum employee contribution as percentage of base compensation for semi-annual purchase of shares				10.00%
Purchase price of common stock (as a percent)				95.00%
Number of shares reserved for issuance				450,000																			5,900,000
Number of shares available for future awards				27,393										600,000										1,309,426
Period over which awards become exercisable																				3 years	5 years	48 months
Expiration term																		10 years	5 years			7 years
Minimum stock price (in dollars per share)													$ 35
Percentage of performance shares to be vested on the thirtieth day following the Determination Date													50.00%
Percentage of performance shares to be vested on each of the next two anniversaries													25.00%
Number of anniversaries of the Determination Date													2
Stock based compensation expense before income taxes	$ 7,638,000	$ 8,616,000	$ 6,226,000								$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value											0
Weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology															$ 9.90	$ 12.71	$ 15.70
Weighted average fair value of restricted stock awards granted (in dollars per share)					$ 35.53	$ 26.30	$ 33.35				$ 17.07
Weighted average assumptions
Grant date price (in dollars per share)												$ 31.30
Expected term (in years)												3 years			4 years 7 months	4 years 5 months	4 years 3 months
Expected volatility (as a percent)												33.50%			32.00%	60.00%	58.00%
Risk-free interest rate (as a percent)												0.40%			0.70%	0.70%	1.70%
Forfeiture rate (as a percent)	6.40%
Expected dividends												0.00%			0.00%	0.00%	0.00%
Number of shares
Outstanding at the beginning of the period (in shares)															1,962,008
Granted (in shares)															343,558
Exercised/vested (in shares)															(357,034)
Canceled/Forfeited (in shares)															(374,168)
Outstanding at the end of the period (in shares)															1,574,364	1,962,008
Exercisable/Deferred at the end of the period (in shares)					72,473										1,154,415
Weighted-Average Exercise Price
Outstanding at the beginning of the period (in dollars per share)															$ 28.99
Granted (in dollars per share)															$ 35.78
Exercised/vested (in dollars per share)															$ 24.01
Canceled/Forfeited (in dollars per share)															$ 37.89
Outstanding at the end of the period (in dollars per share)															$ 29.48	$ 28.99
Exercisable/Deferred at the end of the period (in dollars per share)					$ 29.92										$ 28.18
Restricted Stock Awards Outstanding, Number of shares
Balance at the beginning of the period (in shares)					471,562
Granted (in shares)					201,973
Exercised/vested (in shares)					(110,987)
Canceled/Forfeited (in shares)					(64,120)
Balance at the end of the period (in shares)					498,428	471,562
Restricted Stock Awards Outstanding, Weighted-Average Grant Date Fair Value
Balance at the beginning of the period (in dollars per share)					$ 28.77
Granted (in dollars per share)					$ 35.53	$ 26.30	$ 33.35				$ 17.07
Exercised/vested (in dollars per share)					$ 28.93
Canceled/Forfeited (in dollars per share)					$ 30.82
Balance at the end of the period (in dollars per share)					$ 31.21	$ 28.77
Additional share-based compensation information
Unrecognized compensation expense					8,900,000										4,100,000
Unrecognized compensation expense, period of recognition (in years)					2 years 7 months 25 days										2 years 6 months 25 days
Total intrinsic value for exercised options								4,000,000	3,800,000	4,000,000
Weighted average remaining contractual term of outstanding awards	2 years 10 months
Represents the weighted average period between the balance sheet date and expiration for all vested portions of options and stock appreciation rights outstanding and currently exercisable (or convertible) under the plan, which may be expressed in a decimal value for number of years.	3 years 7 months
Aggregate intrinsic value of outstanding awards	17,200,000
Exercisable awards, The aggregate intrinsic value	14,200,000
Total fair value of shares vested															$ 3,200,000	$ 3,600,000	$ 1,800,000