Common Stock Capitalization (Summary of Common Stock Outstanding) (Details) - shares			3 Months Ended			9 Months Ended		16 Months Ended
	Jul. 26, 2019	Jul. 23, 2019	Sep. 30, 2019		Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019
Stockholders' Equity Note [Abstract]
Stock Issued During Period, Shares, New Issues	525,000	3,500,000	4,025,000	[1]		4,025,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)			29,745,776		30,149,880	29,796,601	31,335,938
Shares repurchased			0		0	(50,825)	(1,186,058)	(411,915)
Director OP LTIP Units exercised			3,610		3,334	3,610	3,334
Ending balance (in shares)			33,774,386		30,155,055	33,774,386	30,155,055	33,774,386
Stock Issued During Period, Shares, Issued for Services					1,841		1,841

[1] Net of underwriters' discount and offering costs.