Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Earnings Per Share Reconciliation [Abstract]
Net income attributable to Karat Packaging Inc.	$ 29,331	$ 10,934	$ 36,072	$ 17,343
Weighted average number of common shares outstanding (in shares)	19,948,690	20,058,247	19,955,917	20,047,436
Basic earnings per share (in dollars per share)	$ 1.47	$ 0.55	$ 1.81	$ 0.87
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Net income attributable to Karat Packaging Inc.	$ 29,331	$ 10,934	$ 36,072	$ 17,343
Weighted average number of common shares outstanding (in shares)	19,948,690	20,058,247	19,955,917	20,047,436
Dilutive shares
Stock options and restricted stock units (in shares)	158,000	133,000	134,000	148,000
Adjusted weighted average number of common shares (in shares)	20,107,051	20,191,111	20,090,225	20,194,942
Diluted earnings per share (in dollars per share)	$ 1.46	$ 0.54	$ 1.80	$ 0.86
Potentially dilutive shares excluded from diluted earnings per share calculation (in shares)	0	0	9,333	0