What is the Church's traditional understanding of usury and has it changed?

From scripture, it would seem that the taking of interest on any loan is unjust (Leviticus 25:36–37). Most people are also familiar with the fact that usury used to be condemned by Christians. But, it would not seem right that the Church would condemn something as intrinsically evil and then later reverse that stance and say it is not intrinsically evil. And, today, no one frets about taking interest on loans as a moral issue. Therefore, has the Church's understanding of usury changed, or have we merely been ignoring the grave sin of usury? Is usury more nuanced than what we are typically taught (the taking of interest and/or the taking of an unjustly large interest on a loan)?