QUARTERLY FINANCIAL INFORMATION (UNAUDITED) - Summary of the unaudited quarterly financial information (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended												12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Quarterly Financial Information Disclosure [Abstract]
Net Sales	$ 108,278	$ 105,108	$ 105,834	$ 84,950	$ 82,403	$ 77,957	$ 87,346	$ 94,957					$ 404,170	$ 342,663	$ 412,659
Operating Income	3,589	4,079	4,510	1,935	2,773	2,534	3,361	3,882					14,113	12,550
Net Income Attributable to Miller Industries, Inc.	$ 2,379	$ 2,622	$ 2,901	$ 1,328	$ 1,676	$ 2,890	$ 2,546	$ 2,010					$ 9,230	$ 9,122	$ 23,008
Basic Income Per Share (in dollars per share)	$ 0.21	$ 0.23	$ 0.26	$ 0.12	$ 0.15	$ 0.26	$ 0.23	$ 0.18					$ 0.82	$ 0.82	$ 1.98
Diluted Income Per Share (in dollars per share)	$ 0.21	$ 0.23	$ 0.26	$ 0.12	$ 0.15	$ 0.26	$ 0.23	$ 0.18					$ 0.82	$ 0.82	$ 1.92
Cash Dividends Declared Per Share (in dollars per share)	$ 0.14	$ 0.14	$ 0.14	$ 0.15	$ 0.13	$ 0.13	$ 0.13	$ 0.13	$ 0.12	$ 0.12	$ 0.12	$ 0.12	$ 0.56	$ 0.52	$ 0.48