382.290.  Revocation of insurer's license, when. — Whenever it appears to the director that any person has committed a violation of sections 382.010 to 382.300 which makes the continued operation of an insurer contrary to the interests of policyholders or the public, the director may, after giving notice and an opportunity to be heard, determine to suspend, revoke or refuse to renew such insurer's license or authority to do business in this state for such period as he finds is required for the protection of policyholders or the public.  Any such determination shall be accompanied by specific findings of fact and conclusions of law.