TRENTON, N.J. - An insurer failed to timely file defenses in an arbitration proceeding with another insurer regarding coverage of underlying property damage claims against a shared insured, a New Jersey appeals panel affirmed Sept. 3, confirming an arbitration award (Excelsior Insurance Co. v One Beacon Insurance Co., No. A-1439-12T1, N.J. Super., App. Div.; 2013 N.J. Super. Unpub. LEXIS 2180).