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SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2013
Allowance for uncollectible accounts- electric utility
Hawaiian Electric Company, Inc. and Subsidiaries
Dec. 31, 2012
Allowance for uncollectible accounts- electric utility
Hawaiian Electric Company, Inc. and Subsidiaries
Dec. 31, 2011
Allowance for uncollectible accounts- electric utility
Hawaiian Electric Company, Inc. and Subsidiaries
Dec. 31, 2013
Allowance for uncollectible interest- bank
Bank
Dec. 31, 2012
Allowance for uncollectible interest- bank
Bank
Dec. 31, 2010
Allowance for uncollectible interest- bank
Bank
Dec. 31, 2013
Allowance for Loan and Lease Losses [Member]
Bank
Dec. 31, 2012
Allowance for Loan and Lease Losses [Member]
Bank
Dec. 31, 2011
Allowance for Loan and Lease Losses [Member]
Bank
Dec. 31, 2013
Allowance for losses for loans receivable
Bank
Dec. 31, 2012
Allowance for losses for loans receivable
Bank
Dec. 31, 2011
Allowance for losses for loans receivable
Bank
Dec. 31, 2013
Valuation Allowance of Deferred Tax Assets [Member]
Dec. 31, 2012
Valuation Allowance of Deferred Tax Assets [Member]
Dec. 31, 2011
Valuation Allowance of Deferred Tax Assets [Member]
Valuation and qualifying accounts                                    
Balance at beginning of period       $ 2,148 $ 2,221 $ 1,278 $ 3,166 $ 4,825 $ 4,397 $ 41,985 $ 37,906 $ 40,646 $ 498 $ 175 $ 128 $ 278 $ 278 $ 0
Charged to costs and expenses       3,812 3,230 4,419 0     1,507 12,883 15,009 0 504 121 0 0 278
Charged to other accounts 0 0 428 1,943 1,180 1,857       4,826 4,026 1,741 (60) 0 0 0 0 0
Deductions       5,574 4,483 5,333 1,505 1,659   8,202 12,830 19,490 187 181 74 0 0 0
Balance at end of period       $ 2,329 $ 2,148 $ 2,221 $ 1,661 $ 3,166 $ 4,397 $ 40,116 $ 41,985 $ 37,906 $ 251 $ 498 $ 175 $ 278 $ 278 $ 278