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CAPITAL STOCK - Share Repurchase Progam (Narrative) (Details) - USD ($)
3 Months Ended 6 Months Ended 47 Months Ended
Mar. 31, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2019
Feb. 08, 2018
Jul. 29, 2015
Share Repurchase Program [Line Items]            
Stock Repurchased and Retired During Period, Value $ (3,024,000) $ (7,681,000)        
Share Repurchase Program [Member] | Common Stock [Member]            
Share Repurchase Program [Line Items]            
Stock Repurchase Program Authorization Date       Jul. 29, 2015    
Stock Repurchased and Retired During Period, Shares       5,665,620    
Stock Repurchased and Retired During Period, Value       $ 40,300,000    
Weighted Average Share Repurchase Price       $ 7.11    
Share Repurchase Program [Member] | Maximum [Member]            
Share Repurchase Program [Line Items]            
Stock Repurchased and Retired During Period, Shares     469,975      
Stock Repurchased and Retired During Period, Value     $ 3,000,000      
Weighted Average Share Repurchase Price     $ 6.43      
Share Repurchase Program [Member] | Maximum [Member] | Common Stock [Member]            
Share Repurchase Program [Line Items]            
Share Repurchase           2,000,000
Stock Repurchase Program Remaining Number Of Shares Authorized To Be Repurchased     857,202 857,202    
Program Increase [Member] | Maximum [Member] | Common Stock [Member]            
Share Repurchase Program [Line Items]            
Share Repurchase         4,522,822