Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events Interim Common Dividend Declared (Details)

v3.10.0.1
Subsequent Events Interim Common Dividend Declared (Details) - $ / shares
1 Months Ended 2 Months Ended 3 Months Ended 6 Months Ended
Jul. 31, 2018
Sep. 30, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Jun. 30, 2018
Jun. 30, 2017
Subsequent Event [Line Items]                      
Dividends declared per common share (in usd per share)       $ 0.47       $ 0.52   $ 0.94 $ 1.02
Common Stock [Member]                      
Subsequent Event [Line Items]                      
Dividends declared per common share (in usd per share)       $ 0.47 $ 0.47 $ 0.47 $ 0.52 $ 0.52 $ 0.50    
Common Stock [Member] | Subsequent Event [Member]                      
Subsequent Event [Line Items]                      
Dividends declared per common share (in usd per share) $ 0.158370                    
Dividends expected to be declared per common share (in usd per share)   $ 0.311630 $ 0.47