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Significant group concentrations of credit risk
 12 Months Ended
Dec. 31, 2015
Risks and Uncertainties [Abstract]  
Significant group concentrations of credit risk
15 · Significant group concentrations of credit risk
Most of the Company’s business activity is with customers located in the State of Hawaii.
The Utilities are regulated operating electric public utilities engaged in the generation, purchase, transmission, distribution and sale of electricity on the islands of Oahu, Hawaii, Maui, Lanai and Molokai in the State of Hawaii. The Utilities provide the only electric public utility service on the islands they serve. The Utilities grant credit to customers, all of whom reside or conduct business in the State of Hawaii.
Most of ASB’s financial instruments are based in the State of Hawaii, except for the investment securities it owns. Substantially all real estate loans receivable are collateralized by real estate in Hawaii. ASB’s policy is to require mortgage insurance on all real estate loans with a loan to appraisal ratio in excess of 80% at origination.