The title insurance surplus fund shall be maintained as a further security to holders and beneficiaries of the title policies issued by the insurer. If all or any part of the fund shall at any time be in excess of the amount required by Section 12370, such excess may be transferred by the insurer to its general assets. If at any time the fund is impaired by reason of a loss, the amount by which it is impaired shall be restored in the manner provided for its accumulation. The reporting of a loss is an impairment of such fund for the purposes of this section.