An insurer may deposit and have on deposit assets or securities in an amount exceeding its deposit required or otherwise permitted under this title by no more than 20 percent of the required or permitted deposit or $50,000, whichever is the larger amount, for the purpose of absorbing fluctuations in the value of assets and securities deposited and to facilitate the exchange and substitution of the assets and securities. During the solvency of the insurer an excess shall be released to the insurer upon its request. During the insolvency of the insurer the excess deposit shall be released only in accordance with Alaska Stat. § 21.24.130(d).