What is the standard of review for a permanent custody order?

In reviewing permanent custody orders, we employ the abuse of discretion standard of review. (In re Marriage of LaMusga (2004) 32 Cal.4th 1072, 1087-1088.) Trial courts have broad powers to fashion custody and visitation plans in the best interest of the child, and the weight to be accorded to the applicable factors are left to the superior court's sound discretion. (Ibid.) "It is a deferential standard of review that requires us to uphold the trial court's determination, even if we disagree with it, so long as it is reasonable." (Stull v. Sparrow (2001) 92 Cal.App.4th 860, 864.)