Is a federal court's order denying intervention reviewed for abuse of discretion?

A district court's order denying intervention is reviewed for abuse of discretion. Floyd v. City of New York, 770 F.3d 1051, 1057 (2d Cir. 2014) (per curiam). "Factors to consider in determining timeliness include: (a) the length of time the applicant knew or should have known of its interest before making the motion; (b) prejudice to existing parties resulting from the applicant's delay; (c) prejudice to the applicant if the motion is denied; and (d) the presence of unusual circumstances militating for or against a finding of timeliness." Id. at 1058 (quotation marks omitted).