Earnings per Share and Earnings per Unit - Narrative (Details) - shares	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Common Units
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Potentially dilutive securities excluded from the computation of EPS (shares)	0	0
Antidilutive securities excluded from the computation of EPS (shares)	0	0
Common Stock
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Potentially dilutive securities excluded from the computation of EPS (shares)	0	0
Antidilutive securities excluded from the computation of EPS (shares)	0	0