Acquisitions and Dispositions - Unaudited Pro Forma Financial Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Business Acquisition [Line Items]
Revenue	$ 79,922	$ 49,155
Net income	7,426	5,994
Net income available to common shareholders	$ 6,903	$ 4,937
Earnings per share - basic (in dollars per share)	$ 0.05	$ 0.04
Earnings per share - diluted (in dollars per share)	$ 0.05	$ 0.04
Weighted average number of share outstanding - basic (in shares)	138,986,629	138,986,629
Weighted average number of shares outstanding - diluted (in shares)	142,605,930	142,605,930
Operating Partnership
Business Acquisition [Line Items]
Revenue	$ 79,922	$ 49,155
Net income	7,426	5,994
Net income available to common shareholders	$ 7,048	$ 5,129
Earnings per unit - basic (in dollars per unit)	$ 0.05	$ 0.04
Earnings per unit - diluted (in dollars per unit)	$ 0.05	$ 0.04
Weighted average limited partnership units outstanding, basic (in shares)	142,172,746	142,172,746
Denominator for earnings per unit - diluted (in shares)	142,605,930	142,605,930