Equity and Earnings per Common Share, Equity Incentive Plan (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended						9 Months Ended
	Jun. 04, 2018	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Equity Incentive Plan Information [Abstract]
Shares of Common Stock Issued, number of securities issued or to be issued upon exercise (in shares)	(338,857)
Number of Securities Remaining Available for Future Issuance under Equity Compensation Plans, Beginning Balance (in shares)		1,156,049	1,168,838	1,235,213	1,235,213	1,288,869	1,288,869	1,235,213	1,288,869
Number of Securities Remaining Available for Future Issuance under Equity Compensation Plans During the Period (in shares)		0	(12,789)		0	(53,656)	0
Number of Securities Remaining Available for Future Issuance under Equity Compensation Plans, Ending Balance (in shares)		1,156,049	1,156,049	1,168,838	1,235,213	1,235,213	1,288,869	1,156,049	1,235,213
Issuance Price (in dollars per share)	$ 0.01		$ 16.42			$ 18.17
January 2, 2019 [Member]
Equity Incentive Plan Information [Abstract]
Number of Securities Remaining Available for Future Issuance under Equity Compensation Plans During the Period (in shares)				(66,375)
Issuance Price (in dollars per share)				$ 17.64
March 26, 2019 [Member]
Equity Incentive Plan Information [Abstract]
Number of Securities Remaining Available for Future Issuance under Equity Compensation Plans During the Period (in shares)				0
Issuance Price (in dollars per share)				$ 17.23
LTIP-OP Units [Member]
Equity Incentive Plan Information [Abstract]
LTIP-OP Units, Beginning Balance (in shares)		(290,275)	(290,275)	(223,900)	(223,900)	(178,500)	(178,500)	(223,900)	(178,500)
LTIP-OP Units, number of securities issued or to be issued upon exercise (in shares)		0	0		0	(45,400)	0
LTIP-OP Units, Ending Balance (in shares)		(290,275)	(290,275)	(290,275)	(223,900)	(223,900)	(178,500)	(290,275)	(223,900)
LTIP-OP Units Forfeited, Beginning Balance (in shares)		916	916	916	916	916	916	916	916
LTIP-OP Units Forfeited, number of securities issued or to be issued upon exercise (in shares)		0	0		0	0	0
LTIP-OP Units Forfeited, Ending Balance (in shares)		916	916	916	916	916	916	916	916
LTIP-OP Units Converted, Beginning Balance (in shares)		18,917	18,917	12,917	12,917	12,917	12,917	12,917	12,917
LTIP-OP Units Converted, number of securities issued or to be issued upon exercise (in shares)		0	0		0	0	0
LTIP-OP Units Converted, Ending Balance (in shares)		18,917	18,917	18,917	12,917	12,917	12,917	18,917	12,917
LTIP-OP unit vesting period								3 years
Share-based compensation expense recognized		$ 225			$ 194			$ 741	$ 494
Unrecognized share-based compensation expense		$ 1,500						$ 1,500		$ 1,200
LTIP-OP Units [Member] | January 2, 2019 [Member]
Equity Incentive Plan Information [Abstract]
LTIP-OP Units, number of securities issued or to be issued upon exercise (in shares)				(66,375)
LTIP-OP Units Forfeited, number of securities issued or to be issued upon exercise (in shares)				0
LTIP-OP Units [Member] | March 26, 2019 [Member]
Equity Incentive Plan Information [Abstract]
LTIP-OP Units Forfeited, number of securities issued or to be issued upon exercise (in shares)				0
LTIP-OP Units Converted, number of securities issued or to be issued upon exercise (in shares)				6,000
LTIP-OP Units [Member] | Maximum [Member]
Equity Incentive Plan Information [Abstract]
Period of recognition of unrecognized share-based compensation expense								3 years
Common Stock [Member]
Equity Incentive Plan Information [Abstract]
Shares of Common Stock Issued, Beginning Balance (in shares)		(76,664)	(63,875)	(57,875)	(57,875)	(49,619)	(49,619)	(57,875)	(49,619)
Shares of Common Stock Issued, number of securities issued or to be issued upon exercise (in shares)		0	(12,789)		0	(8,256)	0
Shares of Common Stock Issued, Ending Balance (in shares)		(76,664)	(76,664)	(63,875)	(57,875)	(57,875)	(49,619)	(76,664)	(57,875)
Shares of Common Stock Forfeited, Beginning Balance (in shares)		3,155	3,155	3,155	3,155	3,155	3,155	3,155	3,155
Shares of Common Stock Forfeited, number of securities issued or to be issued upon exercise (in shares)		0	0		0	0	0
Shares of Common Stock Forfeited, Ending Balance (in shares)		3,155	3,155	3,155	3,155	3,155	3,155	3,155	3,155
Common Stock [Member] | January 2, 2019 [Member]
Equity Incentive Plan Information [Abstract]
Shares of Common Stock Issued, number of securities issued or to be issued upon exercise (in shares)				0
Shares of Common Stock Forfeited, number of securities issued or to be issued upon exercise (in shares)				0
Common Stock [Member] | March 26, 2019 [Member]
Equity Incentive Plan Information [Abstract]
Shares of Common Stock Issued, number of securities issued or to be issued upon exercise (in shares)				(6,000)
Shares of Common Stock Forfeited, number of securities issued or to be issued upon exercise (in shares)				0
2013 Plan [Member] | LTIP-OP Units [Member]
Equity Incentive Plan Information [Abstract]
Number of share equivalent to unit awarded (in shares)								1