In a 53-page decision that at times reads like a partnership primer, the Appellate Division has tackled the tricky issue of the monetary value of a lawyer’s practice and in the process upended many aspects of a New Jersey Big Law attorney’s divorce judgment.

The court on Tuesday reversed the trial judge’s accepted valuation of the lawyer’s stake in his firm—including “the value of goodwill defendant had as an equity partner in the firm”—in Slutsky v. Slutsky, a published decision.