EARNINGS PER SHARE - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
	Dec. 31, 2014	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Numerator:
Net income attributable to Neff Corporation		$ 7,419	$ 0	$ 8,348	$ 0
Add dilutive effect of the following (in shares)
Neff Holdings options (redeemable for cash or Class A common stock)	1,265
Neff Corporation stock options				289
Common Class A
Denominator for diluted net income per share of Class A common stock:
Weighted average shares of Class A common stock outstanding		10,482		10,479
Add dilutive effect of the following (in shares)
Weighted average shares of Class A common stock outstanding, diluted		12,036		12,033
Net income attributable to Neff Corporation per share of Class A common stock, basic (in dollars per share)		$ 0.71		$ 0.80
Net income attributable to Neff Corporation per share of Class A common stock, diluted (in dollars per share)		$ 0.62		$ 0.69