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Subsequent Events (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Feb. 05, 2021
Jul. 22, 2020
Jun. 30, 2020
Mar. 31, 2020
Jun. 30, 2019
Mar. 31, 2019
Jun. 30, 2020
Jun. 30, 2019
Subsequent Event [Line Items]                
Dividends declared per share     $ 0.12 $ 0.12 $ 0.12 $ 0.12 $ 0.24 $ 0.24
MHC [Member]                
Subsequent Event [Line Items]                
Cumulative cash dividends waived             $ 13,200  
Subsequent Event [Member]                
Subsequent Event [Line Items]                
Dividends declared per share   $ 0.12            
Dividends payable, date to be paid   Aug. 20, 2020            
Dividends payable, date of record   Aug. 06, 2020            
Subsequent Event [Member] | MHC [Member]                
Subsequent Event [Line Items]                
Equity securities common stock shares owned   3,636,875            
Equity method investment, ownership percentage   62.10%            
Dividend Declared [Member] | Forecast [Member] | MHC [Member]                
Subsequent Event [Line Items]                
Aggregate annual dividend to be waived per share $ 0.50              
Dividends Waived [Member] | MHC [Member]                
Subsequent Event [Line Items]                
Cash dividends waived     $ 436       $ 873