Equity - Schedule of Common Stock Dividend (Details) - $ / shares							12 Months Ended
	Aug. 01, 2018	May 08, 2018	Feb. 07, 2018	Nov. 01, 2017	Aug. 02, 2017	May 03, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Class Of Stock [Line Items]
Quarterly Dividend							$ 0.63	$ 0.84	$ 0.63
Date of Record									Dec. 31, 2015
Date Paid									Jan. 14, 2016
1st Quarter 2017
Class Of Stock [Line Items]
Quarterly Dividend						$ 0.21
Date of Declaration						May 03, 2017
Date of Record						May 17, 2017
Date Paid						May 31, 2017
2nd Quarter 2017
Class Of Stock [Line Items]
Quarterly Dividend					$ 0.21
Date of Declaration					Aug. 02, 2017
Date of Record					Aug. 16, 2017
Date Paid					Aug. 30, 2017
3rd Quarter 2017
Class Of Stock [Line Items]
Quarterly Dividend				$ 0.21
Date of Declaration				Nov. 01, 2017
Date of Record				Nov. 15, 2017
Date Paid				Nov. 29, 2017
4th Quarter 2017
Class Of Stock [Line Items]
Quarterly Dividend			$ 0.21
Date of Declaration			Feb. 07, 2018
Date of Record			Feb. 19, 2018
Date Paid			Mar. 05, 2018
1st Quarter 2018
Class Of Stock [Line Items]
Quarterly Dividend		$ 0.21
Date of Declaration		May 08, 2018
Date of Record		May 22, 2018
Date Paid		Jun. 05, 2018
2nd Quarter 2018
Class Of Stock [Line Items]
Quarterly Dividend	$ 0.21
Date of Declaration	Aug. 01, 2018
Date of Record	Aug. 15, 2018
Date Paid	Aug. 29, 2018