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Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Consolidated Statements of Comprehensive Income
Net income	$ 21,564	$ 24,249	$ 24,481
Other comprehensive gain
Net unrealized gain on derivative instruments	2,170	1,565	2,879
Reclassification of net realized gain on derivative instrument included in net income	(398)
Reclassification of gain on available-for-sale securities included in net income			(27)
Reclassification of One Liberty Properties, Inc.'s share of joint venture net realized gain on derivative instrument included in net income	(110)
One Liberty Properties, Inc.'s share of joint ventures' net unrealized gain on derivative instruments	76	76	64
Other comprehensive gain	1,738	1,641	2,916
Comprehensive income	23,302	25,890	27,397
Net income attributable to non-controlling interests	(899)	(102)	(59)
Adjustment for derivative instruments attributable to non-controlling interests	(3)	(7)	(5)
Comprehensive income attributable to One Liberty Properties, Inc.	$ 22,400	$ 25,781	$ 27,333

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