Consolidated Statement of Equity (Unaudited) - 9 months ended Sep. 30, 2017 - USD ($)
Total
Redeemable Common Stock [Member]
Common Stock
Class A Common stock
Common Stock
Class T Common stock
Additional Paid-in Capital [Member]
Distributions [Member]
Accumulated Deficit [Member]
Accumulated Other Comprehensive Income [Member]
Total Strategic Storage Trust II, Inc. Equity [Member]
Noncontrolling Interests in our Operating Partnership [Member]
Beginning Balance at Dec. 31, 2016 $ 410,632,923 $ 10,711,682 $ 47,174 $ 6,586 $ 480,692,731 $ (27,665,337) $ (43,777,711) $ 1,377,950 $ 410,681,393 $ (48,470)
Beginning Balance (in shares) at Dec. 31, 2016     47,174,543 6,585,799            
Gross proceeds from issuance of common stock 17,311,370 0 $ 1,028 $ 565 17,309,777 0 0 0 17,311,370 0
Gross proceeds from issuance of common stock (in shares)     1,027,612 564,591            
Offering costs (1,733,335) 0 $ 0 $ 0 (1,733,335) 0 0 0 (1,733,335) 0
Issuance of limited partnership units in our Operating Partnership 4,875,454 0 $ 0 $ 0 0 0 0 0 0 4,875,454
Issuance of limited partnership units in our Operating Partnership (in shares)     0 0            
Changes to redeemable common stock (11,986,832) 11,986,832 $ 0 $ 0 (11,986,832) 0 0 0 (11,986,832) 0
Redemptions of common stock (116) (1,487,154) $ (112) $ (4) 0 0 0 0 (116) 0
Redemptions of common stock (in shares)     (111,574) (4,061)            
Distributions (24,524,724) 0 $ 0 $ 0 0 (24,524,724) 0 0 (24,524,724) 0
Distributions for noncontrolling interests (201,197) 0 0 0 0 0 0 0 0 (201,197)
Issuance of shares for distribution reinvestment plan 11,988,009 0 $ 1,023 $ 154 11,986,832 0 0 0 11,988,009 0
Issuance of shares for distribution reinvestment plan (in shares)     1,022,581 154,527            
Stock compensation expense 21,347 0 $ 0 $ 0 21,347 0 0 0 21,347 0
Net loss attributable to Strategic Storage Trust II, Inc. (12,534,550) 0 0 0 0 0 (12,534,550) 0 (12,534,550) 0
Net loss attributable to the noncontrolling interests in our Operating Partnership (100,585) 0 0 0 0 0 0 0 0 (100,585)
Foreign currency translation adjustment 4,446,136 0 0 0 0 0 0 4,446,136 4,446,136 0
Foreign currency forward contract loss (4,546,081) 0 0 0 0 0 0 (4,546,081) (4,546,081) 0
Interest rate swap and cap contract gains 74,362 0 0 0 0 0 0 74,362 74,362 0
Ending Balance at Sep. 30, 2017 $ 393,722,181 $ 21,211,360 $ 49,113 $ 7,301 $ 496,290,520 $ (52,190,061) $ (56,312,261) $ 1,352,367 $ 389,196,979 $ 4,525,202
Ending Balance (in shares) at Sep. 30, 2017     49,113,162 7,300,856