Share-Based Compensation - Additional Information (Details) - USD ($)		1 Months Ended						12 Months Ended
	Feb. 04, 2015	Oct. 31, 2016	Jul. 31, 2016	Apr. 30, 2016	Jan. 31, 2016	Feb. 28, 2015	May 31, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Initial Public Offering
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Initial public offering, net of offering costs, shares	23,000,000
LTIP Units
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Operating partnership units issued								29,722	28,000	11,264
Stock Based Compensation And Other
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Compensation expenses										$ 100,000
Aggregate intrinsic value of IPO issued										$ 100,000
Stock Based Compensation And Other | Initial Public Offering
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Initial public offering, net of offering costs, shares							11,264
2015 Equity Incentive Plan
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Equity based compensation								375,000
Common stock reserved for future Issuance								296,986
Unamortized stock compensation expense								$ 0
2015 Equity Incentive Plan | General And Administrative Expense
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Compensation expenses								$ 1,000,000	$ 700,000
2015 Equity Incentive Plan | Director
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Grant date fair value per share		$ 17.84	$ 17.58	$ 16.81	$ 18.58
Grant date fair value		$ 100,000	$ 100,000	$ 100,000	$ 100,000
Aggregate common stock shares issued to directors		4,812	5,248	5,497	4,735
2015 Equity Incentive Plan | Director | LTIP Units
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
LTIP Units issued to directors					29,722
Grant date fair value per share					$ 18.58	$ 26.41
Grant date fair value					$ 600,000	$ 700,000
Vesting period of LTIP Units					Jan. 01, 2017
Operating partnership units issued						28,000
Non-Qualified 2015 Employee Stock Purchase Plan
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Equity based compensation								250,000
Common stock reserved for future Issuance								250,000
Shares purchased under ESPP								0