XML 47 R37.htm IDEA: XBRL DOCUMENT v3.10.0.1
Equity - Schedule of Common Stock Dividend (Details) - $ / shares
3 Months Ended 6 Months Ended
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Class Of Stock [Line Items]            
Quarterly Dividend $ 0.21     $ 0.21 $ 0.42 $ 0.42
Common Stock            
Class Of Stock [Line Items]            
Quarterly Dividend $ 0.21 $ 0.21 $ 0.21      
Date of Declaration Aug. 01, 2018 May 08, 2018 Feb. 07, 2018      
Date of Record Aug. 15, 2018 May 22, 2018 Feb. 19, 2018      
Date Paid/Payable Aug. 29, 2018 Jun. 05, 2018 Mar. 05, 2018