SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract]
Total revenues	$ 106,862	$ 110,686	$ 86,524	$ 57,854	$ 48,230	$ 52,412	$ 25,436	$ 108,385	$ 361,926	$ 234,463	$ 549,348
Net loss	(10,905)	(4,239)	(20,569)	(32,871)	(44,708)	(35,775)	(52,548)	(16,214)	(68,584)	(149,245)	82,348
Net loss attributable to Summit Hotel Properties, Inc.	$ (11,012)	$ (4,504)	$ (18,692)	$ (31,365)	$ (43,054)	$ (34,546)	$ (50,417)	$ (15,322)	$ (65,573)	$ (143,339)	$ 82,610
Loss per share:
Basic (in shares)	$ (0.15)	$ (0.10)	$ (0.21)	$ (0.34)	$ (0.45)	$ (0.37)	$ (0.52)	$ (0.18)	$ (0.80)	$ (1.52)	$ 0.65
Diluted (in shares)	$ (0.15)	$ (0.10)	$ (0.21)	$ (0.34)	$ (0.45)	$ (0.37)	$ (0.52)	$ (0.18)	$ (0.80)	$ (1.52)	$ 0.65