Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Net income	$ 10,331	$ 7,184	$ 17,047	$ 12,608
Other Comprehensive Income [Abstract]
Change in fair value of interest rate swap agreements	(2,367)	0	(780)	0
Total other comprehensive income	(2,367)	0	(780)	0
Comprehensive income	7,964	7,184	16,267	12,608
Comprehensive income attributable to noncontrolling interests - Operating Partnership	(234)	(201)	(435)	(374)
Comprehensive income attributable to noncontrolling interests - partially owned properties	(159)	(60)	(326)	(377)
Comprehensive income attributable to common shareholders	7,571	6,923	15,506	11,857
Operating Partnership
Net income	10,331	7,184	17,047	12,608
Other Comprehensive Income [Abstract]
Change in fair value of interest rate swap agreements	(2,367)	0	(780)	0
Total other comprehensive income	(2,367)	0	(780)	0
Comprehensive income	7,964	7,184	16,267	12,608
Comprehensive income attributable to noncontrolling interests - partially owned properties	(159)	(60)	(326)	(377)
Comprehensive income attributable to common shareholders	$ 7,805	$ 7,124	$ 15,941	$ 12,231