QUARTERLY FINANCIAL INFORMATION (UNAUDITED) - Summary of the unaudited quarterly financial information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract]
Net Sales	$ 136,436	$ 126,205	$ 151,537	$ 126,788	$ 147,778	$ 118,398	$ 122,432	$ 104,168	$ 540,966	$ 492,776	$ 404,170
Operating Income	6,445	5,271	9,894	4,512	9,434	5,736	5,547	3,772	26,122	24,489
Net Income Attributable to Miller Industries, Inc.	$ 3,878	$ 3,168	$ 5,866	$ 3,064	$ 5,657	$ 3,494	$ 3,387	$ 2,366	$ 15,976	$ 14,904	$ 9,230
Basic Income Per Share (in dollars per share)	$ 0.34	$ 0.28	$ 0.52	$ 0.27	$ 0.5	$ 0.31	$ 0.3	$ 0.21	$ 1.41	$ 1.32	$ 0.82
Diluted Income Per Share (in dollars per share)	0.34	0.28	0.52	0.27	0.5	0.31	0.3	0.2	1.41	1.31	0.82
Cash Dividends Declared Per Share (in dollars per share)	$ 0.16	$ 0.16	$ 0.16	$ 0.16	$ 0.15	$ 0.15	$ 0.15	$ 0.15	$ 0.64	$ 0.60	$ 0.56