STOCK-BASED COMPENSATION Stock Options Activity (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Weighted Average Exercise Price per Share:
Aggregate Intrinsic Value, outstanding	$ 0
Aggregate Intrinsic Value, exercisable	0
Number of Shares Authorized	7,500,000
Proceeds from stock options exercised	33,000	242,000	591,000
Stock Options [Member]
Shares:
Outstanding at beginning of year	2,901,687	2,539,062	2,000,750
Granted	0	555,000	720,000
Exercised	(16,000)	(23,625)	(32,313)
Forfeited	(636,062)	(168,750)	(149,375)
Expired	(30,000)	0	0
Outstanding at end of year	2,219,625	2,901,687	2,539,062
Vested or expected to vest	2,145,544
Exercisable at end of period	1,631,500
Weighted Average Exercise Price per Share:
Outstanding at beginning of period	$ 32.86	$ 35.44	$ 39.59
Granted	$ 0.00	$ 22.33	$ 25.59
Exercised	$ 2.06	$ 10.23	$ 18.31
Forfeited	$ 35.61	$ 40.17	$ 47.28
Expired	$ 90.54	$ 0.00	$ 0.00
Oustanding at end of period	$ 31.51	$ 32.86	$ 35.44
Vested or expected to vest	$ 31.80
Exercisable at end of period	$ 34.26
Weighted Average Remaining Contractual Term (years), outstanding	4 years 0 months 22 days	4 years 5 months 27 days
Weighted Average Remaining Contractual Term (years), Vested or expected to vest	3 years 11 months 27 days
Weighted Average Remaining Contractual Term (years), exercisable	3 years 5 months 5 days
Aggregate Intrinsic Value, outstanding	0	71,000
Aggregate Intrinsic Value, Vested or expected to vest	0
Aggregate Intrinsic Value, exercisable	0
Maximum life of issued options	10 years
Proceeds from stock options exercised	0	200,000	600,000
Exercises in period, total intrinsic value	100,000	300,000	200,000
Unrecognized compensation expense	4,900,000
Options exchanged for restricted stock unit	1,710,500
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Risk -free interest rate		1.67%	2.02%
Expected term (years)		4 years 9 months 26 days	4 years 10 months 24 days
Expected volatility		57.90%	57.26%
Dividend yield		0.00%	0.00%
Weighted-average fair value		$ 10.98	$ 12.64
Restricted Stock Units (RSUs) [Member]
Weighted Average Exercise Price per Share:
Unrecognized compensation expense	$ 2,300,000
Options exchanged for restricted stock unit	845,680
Minimum [Member] | Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	1 year
Minimum [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	1 year
Maximum [Member] | Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	4 years
Maximum [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	4 years