Bank segment (HEI only) (Details 7) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Derivative instrument
Percentage of benchmark loan to appraisal ratio in excess of which mortgage insurance is required	80.00%
Real estate loans for investors	$ 1,400,000,000	$ 1,400,000,000	$ 1,300,000,000
Loans pledged as collateral to secure advances from the FHLB of Seattle	1,900,000,000	1,700,000,000
Loans to directors, executive directors, affiliates and any related interest of such individuals	49,600,000	45,800,000
Lines of credit closed and repaid, net of new loans and lines of credit to executive directors	3,800,000
New loans and lines of credit to executive directors	6,400,000
Lines of credit closed and repaid	2,600,000
Loan balances, related interests of individuals who are directors	$ 46,200,000	$ 40,500,000