Nature of Business (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Jul. 15, 2021	Dec. 31, 2020	Nov. 26, 2018
Numerator for (loss) income per common share calculation:
Net (loss) income attributable to Hemisphere Media Group, Inc.	$ (14,801)		$ 5,297	$ 12,271	$ (10,813)
Denominator for (loss) income per common share calculation:
Weighted-average common shares, basic	39,713		39,489	39,578	39,415
Effect of dilutive securities
Stock options and restricted stock			36	382
Weighted-average common shares, diluted	39,713		39,525	39,960	39,415
(Loss) income per share attributable to Hemisphere Media Group, Inc.
Basic	$ (0.37)		$ 0.13	$ 0.31	$ (0.27)
Diluted	$ (0.37)		$ 0.13	$ 0.31	$ (0.27)
Common Class A
(Loss) income per share attributable to Hemisphere Media Group, Inc.
Shares excluded from the computation of diluted income (loss) per common share	1,700,000		3,900,000	2,000,000.0	3,100,000
Outstanding common stock awards excluded from computation of diluted loss per share	400,000				200,000
Common stock, par value (in dollars per share)	$ 0.0001		$ 0.0001	$ 0.0001	$ 0.0001		$ 0.0001
Snap Global. LLC
Nature of business
Percentage of minority interest relinquished						25.00%
Equity interest acquired (as a percent)								75.00%
PANTAYA
Nature of business
Equity interest owned prior to transaction (in percent)		25.00%
Purchase price		$ 123,605
Equity interest acquired (as a percent)		75.00%