The three preceding positions are usually voluntary and considered an honor. Since the Enlightenment large synagogues have often adopted the practice of hiring rabbis and hazzans to act as "shatz" and "baal kriyah", and this is still typically the case in many Conservative and Reform congregations. However, in most Orthodox synagogues these positions are filled by laypeople on a rotating or ad-hoc basis. Although most congregations hire one or more Rabbis, the use of a professional hazzan is generally declining in American congregations, and the use of professionals for other offices is rarer still.