Bank segment (HEI only) Mortgage Servicing Rights (Details) (American Savings Bank (ASB), Mortgage Servicing Rights (MSR), USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
American Savings Bank (ASB) \| Mortgage Servicing Rights (MSR)
Loans receivable
Gross carrying amount	$ 27,185	$ 25,644
Accumulated amortization	(15,436)	(13,706)
Valuation allowance	(209)	(251)	(498)	(175)
Net carrying amount	$ 11,540	$ 11,687	$ 10,818

Reflects the estimated amount of impairment as of the balance sheet date of recognized servicing assets that are being amortized in proportion to and over the period of estimated net servicing income or loss.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 50

-Section 50

-Paragraph 4

-Subparagraph (e)(1)

-URI http://asc.fasb.org/extlink&oid=7882072&loc=d3e122739-111746

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant