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EQUITY INSTRUMENTS (Narrative) (Details) - USD ($)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Compensation expense of restricted stock and restricted stock units $ 4,312,000 $ 4,740,000 $ 4,800,000
Recognized decrease/(increase) in taxes payable from the exercise of certain stock options and restricted stock 2,750,000 $ (68,000) $ (203,000)
Total unrecognized compensation expense related to unvested share-based compensation arrangements $ 5,714,000    
Period over which unvested share-based compensation is expected to be recognized, weighted average (in Duration) 1 year 1 month 6 days    
Board of Directors Compensation [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Common stock issued for services (in Shares) 22,000 27,000 50,000
Common stock issued for services, costs recognized $ 509,000 $ 455,000 $ 455,000
Non-Employee Services [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Common stock issued for services (in Shares) 0 2,000 0
Common stock issued for services, costs recognized $ 0 $ 30,000 $ 195,000
Maximum [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Award expiration period (in Duration) 10 years    
Award vesting period (in Duration) 4 years    
Minimum [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Award vesting period (in Duration) 2 years    
Stock Option [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Compensation expense for stock option awards $ 647,000 $ 426,000 $ 382,000
Weighted-average grant date fair value of stock options granted during the period (in Dollars per Share) $ 5.18 $ 3.88 $ 1.61
Stock options exercised during the period, total intrinsic value $ 5,520,000 $ 219,000 $ 7,000
Stock Option [Member] | Maximum [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Award expiration period (in Duration) 10 years    
Stock Option [Member] | Minimum [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Award expiration period (in Duration) 7 years    
Restricted Stock [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Number of shares expected to vest (in Shares) 264,000    
Restricted Stock [Member] | Maximum [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Award vesting period (in Duration) 4 years    
Restricted Stock [Member] | Minimum [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Award vesting period (in Duration) 2 years    
Restricted Stock Units [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Minimum percentage that restricted stock performance based units may increase over original award caused by achievement of goals (in Percent) 0.00%    
Maximum percentage that restricted stock performance based units may increase over original award caused by achievement of goals (in Percent) 200.00%    
Number of shares expected to vest (in Shares) 308,000    
1999 Equity Incentive Plan [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Shares authorized under an equity incentive plan (in Shares) 1,000,000    
Awards exercisable after 10 years from date award is granted (in Shares) 0    
2000 Equity Incentive Plan [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Shares authorized under an equity incentive plan (in Shares) 5,600,000    
Awards exercisable after 10 years from date award is granted (in Shares) 0    
Amended and Restated 2008 Long Term Incentive Plan [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Shares authorized under an equity incentive plan (in Shares) 5,400,000    
Shares available for grant (in Shares) 1,476,000    
Awards exercisable after 10 years from date award is granted (in Shares) 0