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Benefit Plans and Capital Transactions (Details) - $ / shares
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Total Dividend Amount   $ 0.08
November 26, 2019[Member]    
Date Declared Oct. 30, 2019  
Stockholder Record Date Nov. 14, 2019  
Regular Dividend Amount $ 0.175  
Special Dividend Amount 0.475  
Total Dividend Amount $ 0.650  
August 29, 2019 [Member]    
Date Declared Aug. 01, 2019  
Stockholder Record Date Aug. 15, 2019  
Regular Dividend Amount $ 0.175  
Special Dividend Amount 0.325  
Total Dividend Amount $ 0.500  
May 29, 2019 [Member]    
Date Declared May 01, 2019  
Stockholder Record Date May 15, 2019  
Regular Dividend Amount $ 0.08  
Special Dividend Amount 0.18  
Total Dividend Amount $ 0.26  
March 26, 2019 [Member]    
Date Declared Mar. 05, 2019  
Stockholder Record Date Mar. 19, 2019  
Regular Dividend Amount $ 0.08  
Special Dividend Amount 0.00  
Total Dividend Amount $ 0.08  
November 27, 2018 [Member]    
Date Declared Nov. 05, 2018  
Stockholder Record Date Nov. 16, 2018  
Regular Dividend Amount $ 0.08  
Special Dividend Amount 0.08  
Total Dividend Amount $ 0.16  
August 29, 2018 [Member]    
Date Declared Aug. 02, 2018  
Stockholder Record Date Aug. 16, 2018  
Regular Dividend Amount $ 0.08  
Special Dividend Amount 0.22  
Total Dividend Amount $ 0.30  
June 5, 2018 [Member]    
Date Declared May 07, 2018  
Stockholder Record Date May 21, 2018  
Regular Dividend Amount $ 0.08  
Special Dividend Amount 0.04  
Total Dividend Amount $ 0.12  
April 3, 2018 [Member]    
Date Declared Mar. 07, 2018  
Stockholder Record Date Mar. 20, 2018  
Regular Dividend Amount $ 0.08  
Special Dividend Amount 0.08  
Total Dividend Amount $ 0.16