Investments in Unconsolidated Real Estate Ventures - Schedule of Investments in Unconsolidated Real Estate Ventures (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Apr. 08, 2016	Dec. 31, 2015
Schedule of Equity Method Investments [Line Items]
Investment balance	$ 79,570		$ 103,007
VRS [Member]
Schedule of Equity Method Investments [Line Items]
Equity method ownership percentage	45.00%
Excess profit participation percentage	54.00%
Investment balance	$ 20,433		39,091
PREXR {Member]
Schedule of Equity Method Investments [Line Items]
Equity method ownership percentage	25.00%	25.00%
Excess profit participation percentage	40.00%
Investment balance	$ 12,430		0
SPI [Member]
Schedule of Equity Method Investments [Line Items]
Equity method ownership percentage	25.00%
Investment balance	$ 11,782		11,813
SPI [Member] | Minimum [Member]
Schedule of Equity Method Investments [Line Items]
Excess profit participation percentage	25.00%
SPI [Member] | Maximum [Member]
Schedule of Equity Method Investments [Line Items]
Excess profit participation percentage	40.00%
PRISA [Member]
Schedule of Equity Method Investments [Line Items]
Equity method ownership percentage	4.00%
Excess profit participation percentage	4.00%
Investment balance	$ 10,152		10,309
ESW II [Member]
Schedule of Equity Method Investments [Line Items]
Equity method ownership percentage	5.00%
Excess profit participation percentage	40.00%
Investment balance	$ 4,048		4,122
PRISA II [Member]
Schedule of Equity Method Investments [Line Items]
Equity method ownership percentage	0.00%
Excess profit participation percentage	0.00%
Investment balance	$ 0		8,323
WCOT [Member]
Schedule of Equity Method Investments [Line Items]
Equity method ownership percentage	5.00%
Excess profit participation percentage	20.00%
Investment balance	$ 160		3,783
Clarendon [Member]
Schedule of Equity Method Investments [Line Items]
Equity method ownership percentage	50.00%
Excess profit participation percentage	50.00%
Investment balance	$ 3,111		3,131
ESSM [Member]
Schedule of Equity Method Investments [Line Items]
Equity method ownership percentage	48.00%
Excess profit participation percentage	48.00%
Investment balance	$ 1,202		1,200
ESW [Member]
Schedule of Equity Method Investments [Line Items]
Equity method ownership percentage	5.00%
Excess profit participation percentage	40.00%
Investment balance	$ (546)		(405)
ESNPS [Member]
Schedule of Equity Method Investments [Line Items]
Equity method ownership percentage	10.00%
Excess profit participation percentage	35.00%
Investment balance	$ (905)		(470)
Other Minority Owned Properties [Member]
Schedule of Equity Method Investments [Line Items]
Investment balance	$ 17,703		6,148
Other Minority Owned Properties [Member] | Minimum [Member]
Schedule of Equity Method Investments [Line Items]
Equity method ownership percentage	10.00%
Excess profit participation percentage	19.00%
Other Minority Owned Properties [Member] | Maximum [Member]
Schedule of Equity Method Investments [Line Items]
Equity method ownership percentage	50.00%
Excess profit participation percentage	50.00%
Total Investment [Member]
Schedule of Equity Method Investments [Line Items]
Investment balance	$ 79,570		87,045
Strategic Storage Growth Trust Inc [Member]
Schedule of Equity Method Investments [Line Items]
Investment balance	$ 0		$ 15,962