SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Total revenues	$ 133,781	$ 133,685	$ 142,930	$ 138,952	$ 132,509	$ 142,340	$ 152,222	$ 140,199	$ 549,348	$ 567,270	$ 515,377
Net income	8,753	11,626	49,069	12,900	5,757	38,001	37,677	9,691	82,348	91,126	99,521
Net income attributable to Summit Hotel Properties, Inc.	$ 9,242	$ 11,534	$ 48,957	$ 12,877	$ 5,756	$ 37,901	$ 37,576	$ 9,688	$ 82,610	$ 90,921	$ 99,214
Earnings per share:
Basic and diluted (in dollars per share)	$ 0.05	$ 0.07	$ 0.43	$ 0.09					$ 0.65	$ 0.68	$ 0.79
Basic (in dollars per share)					$ 0.02	$ 0.33	$ 0.33	$ 0.01
Diluted (in dollars per share)					$ 0.02	$ 0.33	$ 0.32	$ 0.01