STOCK INCENTIVE AND STOCK OPTION PLANS (Details) (USD $)	12 Months Ended																								1 Months Ended									12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 Range 1 of Exercise Prices [Member]	Dec. 31, 2012 Range 2 of Exercise Prices [Member]	Dec. 31, 2012 Range 3 of Exercise Prices [Member]	Dec. 31, 2012 Range 4 of Exercise Prices [Member]	Dec. 31, 2012 Range 5 of Exercise Prices [Member]	Dec. 31, 2012 Long-Term Equity Incentive plan [Member]	Dec. 31, 2011 Long-Term Equity Incentive plan [Member]	Dec. 31, 2010 Long-Term Equity Incentive plan [Member]	Dec. 31, 2012 1998 Plan [Member]	Dec. 31, 2012 Stock Options [Member]	Dec. 31, 2011 Stock Options [Member]	Dec. 31, 2010 Stock Options [Member]	Dec. 31, 2008 Stock Options [Member]	Dec. 31, 2012 Stock Options [Member] Minimum [Member]	Dec. 31, 2010 Stock Options [Member] Minimum [Member]	Dec. 31, 2008 Stock Options [Member] Minimum [Member]	Dec. 31, 2012 Stock Options [Member] Maximum [Member]	Dec. 31, 2010 Stock Options [Member] Maximum [Member]	Dec. 31, 2008 Stock Options [Member] Maximum [Member]	Dec. 31, 2012 Stock Options [Member] Long-Term Equity Incentive plan [Member]	Dec. 31, 2012 Nonvested Options [Member]	Jan. 31, 2012 Performance Shares [Member] Long-Term Equity Incentive plan [Member]	Mar. 31, 2011 Performance Shares [Member] Long-Term Equity Incentive plan [Member]	Jan. 31, 2010 Performance Shares [Member] Long-Term Equity Incentive plan [Member]	Jan. 31, 2009 Performance Shares [Member] Long-Term Equity Incentive plan [Member]	Jun. 30, 2012 Restricted Stock Units [Member] Long-Term Equity Incentive plan [Member]	May 31, 2012 Restricted Stock Units [Member] Long-Term Equity Incentive plan [Member]	May 31, 2011 Restricted Stock Units [Member] Long-Term Equity Incentive plan [Member]	May 31, 2010 Restricted Stock Units [Member] Long-Term Equity Incentive plan [Member]	May 31, 2009 Restricted Stock Units [Member] Long-Term Equity Incentive plan [Member]	Dec. 31, 2009 2009 grant of performance shares [Member] Long-Term Equity Incentive plan [Member]	Dec. 31, 2012 2011 grant of performance shares [Member] Long-Term Equity Incentive plan [Member]	Dec. 31, 2011 2011 grant of performance shares [Member] Long-Term Equity Incentive plan [Member]	Dec. 31, 2010 2010 grant of performance shares [Member] Long-Term Equity Incentive plan [Member]	Dec. 31, 2012 2012 grant of performance shares [Member] Long-Term Equity Incentive plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercisable period of options, minimum (in years)	1 year
Exercisable period of options, maximum (in years)	10 years
Minimum percentage of each director's compensation paid in form of the Company's common stock (in hundredths)												50.00%
Compensation expense recognized (reversed)	$ 1,900,000	$ 2,100,000	$ 2,100,000						$ 67,000	$ 37,000	$ 112,000		$ 1,900,000	$ 2,100,000	$ 2,100,000														$ 199,000					$ 461,000	$ 659,000	$ 147,000	$ (461,000)	$ 731,000
Total unrecognized compensation cost related to nonvested stock options													1,400,000
Weighted-average period for recognition of unrecognized expenses (in years)													3 years
Stock option activity [Roll Forward]
Outstanding at beginning of period (in shares)													2,714,023	2,946,307
Nonvested, outstanding at beginning of period (in shares)																								383,789
Granted (in shares)													338,681										338,681	338,681
Exercised (in shares)													(6,333)	(2,225)
Vested (in shares)																								(253,085)
Cancelled or forfeited (in shares)													(174,183)	(76,659)										(11,391)
Expired (in shares)													(107,334)	(153,400)
Outstanding at end of period (in shares)													2,764,854	2,714,023	2,946,307
Nonvested, outstanding at end of period (in shares)																								457,994
Exercisable at end of period (in shares)													2,306,860	2,330,234
Stock options, additional disclosures [Abstract]
Outstanding at beginning of period, Weighted-average exercise price (in dollars per share)													$ 21.72	$ 21.41										$ 16.20
Granted, Weighted-average exercise price (in dollars per share)													$ 11.93											$ 11.93
Vested, Weighted-average exercise price (in dollars per share)																								$ 17.60
Exercised, Weighted-average exercise price (in dollars per share)													$ 12.94	$ 9.40
Cancelled or forfeited, Weighted-average exercise price (in dollars per share)													$ 22.04	$ 22.86										$ 14.99
Expired, Weighted-average exercise price (in dollars per share)													$ 20.03	$ 15.39
Outstanding at end of period, Weighted-average exercise price (in dollars per share)													$ 20.58	$ 21.72	$ 21.41									$ 12.30
Exercisable at end of period, Weighted-average exercise price (in dollars per share)													$ 22.23	$ 22.63
Outstanding at end of period, Weighted-average remaining contractual term (in years)													3 years 1 month 6 days	3 years 7 months 6 days									7 years
Exercisable at end of period, Weighted-average remaining contractual term (in years)													2 years 7 months 6 days	3 years 3 months 18 days
Outstanding at end of period, Weighted-average intrinsic value													1,374,000	2,000
Exercisable at end of period, Weighted-average intrinsic value													1,332,000	2,000
Non-vested options, Weighted-Average grant date fair value [Roll Forward]
Outstanding at beginning of period, Weighted-average grant date fair value (in dollars per share)																								$ 4.87
Granted, Weighted-average grant date fair value (in dollars per share)																								$ 4.16
Vested, Weighted-average grant date fair value (in dollars per share)																								$ 5.29
Forfeited or cancelled, Weighted-average grant date fair value (in dollars per share)																								$ 4.72
Outstanding at end of period, Weighted-average grant date fair value (in dollars per share)																								$ 4.11
Additional general disclosures [Abstract]
Vesting period, description													one, two or three-year service period
Vesting period (in years)																									3 years	3 years	3 years	3 years
Assumptions used for stock options [Abstract]
Expected volatility (in hundredths)													49.90%		45.20%	33.60%
Weighted-average volatility (in hundredths)													49.90%		45.20%	33.60%
Expected dividends (in hundredths)													2.50%		3.75%	3.00%
Expected term (in years)																	4 years 9 months 18 days	4 years 9 months 18 days	5 years 1 month 6 days	4 years 10 months 24 days	6 years	5 years 8 months 12 days
Risk-free rate (in hundredths)													0.81%		1.64%	2.80%
Intrinsic value of stock options exercised													$ 9,000	$ 6,000	$ 143,000
Equity instruments other than options [Abstract]
Number of awards granted (in shares)																									103,055	125,410	125,395	101,225	60,000	7,500	0	5,000	5,000
Terms of award																									two-year performance period from January 1, 2012 through December 31, 2013	two-year performance period from January 1, 2011 through December 31, 2012	two-year performance period from January 1, 2010 through December 31, 2011	two-year performance period from January 1, 2009 through December 31, 2010
Shares of stock covered by award (in shares)																													60,000	7,500	0	5,000	5,000
Stock options outstanding [Abstract]
Range of Exercise Prices, lower limit (in dollars per share)				$ 9.97	$ 17.10	$ 23.19	$ 24.27	$ 9.97
Range of Exercise Prices, upper limit (in dollars per share)				$ 13.25	$ 22.97	$ 24.03	$ 25.31	$ 25.31
Number Outstanding (in shares)				719,287	725,517	726,200	593,850	2,764,854
Options Outstanding, Weighted Average Remaining Life (in years)				5 years 4 months 24 days	2 years 8 months 12 days	1 year 10 months 24 days	2 years 2 months 12 days	3 years 1 month 6 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share)				$ 12.63	$ 22.31	$ 23.52	$ 24.52	$ 20.58
Number Exercisable (in shares)				261,293	725,517	726,200	593,850	2,306,860
Options Exercisable, Weighted Average Exercise Price (in dollars per share)				$ 13.21	$ 22.31	$ 23.52	$ 24.52	$ 22.23