Subsequent Events - Additional Information (Detail) - Jul. 01, 2015 - Subsequent Event [Member] - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	Total
Subsequent Event [Line Items]
Number of shares of common stock sold	7,590
Public offering price per share	$ 24.00
Net proceeds to NN from the offering	$ 173,052
Repayment of term loan and ABL revolver	$ 148,739