Bank segment (HEI only) Credit Risk Profile by Internally Assigned Grade for Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Credit risk profile by internally assigned grade for loans
Total financing receivables	$ 4,622,068	$ 4,440,989
Loans, Excluding Consumer Loans
Credit risk profile by internally assigned grade for loans
Total financing receivables	1,550,016	1,420,112
Loans, Excluding Consumer Loans | Pass
Credit risk profile by internally assigned grade for loans
Total financing receivables	1,432,609	1,315,751
Loans, Excluding Consumer Loans | Special mention
Credit risk profile by internally assigned grade for loans
Total financing receivables	28,544	21,304
Loans, Excluding Consumer Loans | Substandard
Credit risk profile by internally assigned grade for loans
Total financing receivables	88,416	82,394
Loans, Excluding Consumer Loans | Doubtful
Credit risk profile by internally assigned grade for loans
Total financing receivables	447	663
Loans, Excluding Consumer Loans | Loss
Credit risk profile by internally assigned grade for loans
Total financing receivables	0	0
Commercial real estate
Credit risk profile by internally assigned grade for loans
Total financing receivables	690,561	531,917
Commercial real estate | Pass
Credit risk profile by internally assigned grade for loans
Total financing receivables	642,410	493,105
Commercial real estate | Special mention
Credit risk profile by internally assigned grade for loans
Total financing receivables	7,710	5,209
Commercial real estate | Substandard
Credit risk profile by internally assigned grade for loans
Total financing receivables	40,441	33,603
Commercial real estate | Doubtful
Credit risk profile by internally assigned grade for loans
Total financing receivables	0	0
Commercial real estate | Loss
Credit risk profile by internally assigned grade for loans
Total financing receivables	0	0
Commercial construction
Credit risk profile by internally assigned grade for loans
Total financing receivables	100,796	96,438
Commercial construction | Pass
Credit risk profile by internally assigned grade for loans
Total financing receivables	86,991	79,312
Commercial construction | Special mention
Credit risk profile by internally assigned grade for loans
Total financing receivables	13,805	0
Commercial construction | Substandard
Credit risk profile by internally assigned grade for loans
Total financing receivables	0	17,126
Commercial construction | Doubtful
Credit risk profile by internally assigned grade for loans
Total financing receivables	0	0
Commercial construction | Loss
Credit risk profile by internally assigned grade for loans
Total financing receivables	0	0
Commercial loans
Credit risk profile by internally assigned grade for loans
Total financing receivables	758,659	791,757
Commercial loans | Pass
Credit risk profile by internally assigned grade for loans
Total financing receivables	703,208	743,334
Commercial loans | Special mention
Credit risk profile by internally assigned grade for loans
Total financing receivables	7,029	16,095
Commercial loans | Substandard
Credit risk profile by internally assigned grade for loans
Total financing receivables	47,975	31,665
Commercial loans | Doubtful
Credit risk profile by internally assigned grade for loans
Total financing receivables	447	663
Commercial loans | Loss
Credit risk profile by internally assigned grade for loans
Total financing receivables	$ 0	$ 0