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Stockholders' Equity - Schedule of Declared Cash Dividends Per Share (Details) - $ / shares
3 Months Ended 9 Months Ended
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Sep. 30, 2019
Sep. 30, 2018
Common stock                
Dividends, Common Stock [Abstract]                
Dividends declared per Common Share $ 0.040 $ 0.040 $ 0.040 $ 0.035 $ 0.035   $ 0.120 $ 0.105
Common Stock - Class A                
Dividends, Common Stock [Abstract]                
Dividends declared per Common Share           $ 0.035