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Bank segment (HEI only) Available For Sale Investment Securities (Details) $ in Thousands | Dec. 31, 2014 USD ($) issue | Dec. 31, 2013 USD ($) issue
--- | --- | ---
Available-for-sale securities |  |
Total available-for-sale securities, amortized cost | $ 549,627 | $ 535,090
Gross unrealized gains | 6,745 | 6,911
Gross unrealized losses | (5,978) | (12,994)
Available-for-sale investment securities | $ 550,394 | $ 529,007
Available-for-sale Securities, Continuous Unrealized Loss Position |  |
Number of issues, less than 12 months | issue | 12 | 49
Fair value, less than 12 months | $ 88,999 | $ 313,820
Gross unrealized losses, less than 12 months | $ (525) | $ (11,353)
Number of issues, more than 12 months | issue | 34 | 4
Fair value, 12 months or longer | $ 201,791 | $ 19,655
Gross unrealized losses, 12 months or longer | (5,453) | (1,641)
U.S. Treasury and federal agency obligations |  |
Available-for-sale securities |  |
Total available-for-sale securities, amortized cost | 119,507 |
Gross unrealized gains | 1,092 |
Gross unrealized losses | (1,039) |
Available-for-sale investment securities | $ 119,560 |
Available-for-sale Securities, Continuous Unrealized Loss Position |  |
Number of issues, less than 12 months | issue | 6 |
Fair value, less than 12 months | $ 41,970 |
Gross unrealized losses, less than 12 months | $ (361) |
Number of issues, more than 12 months | issue | 5 |
Fair value, 12 months or longer | $ 29,168 |
Gross unrealized losses, 12 months or longer | (678) |
Mortgage-related securities-FNMA, FHLMC and GNMA |  |
Available-for-sale securities |  |
Total available-for-sale securities, amortized cost | 430,120 | 374,993
Gross unrealized gains | 5,653 | 4,911
Gross unrealized losses | (4,939) | (10,460)
Available-for-sale investment securities | $ 430,834 | $ 369,444
Available-for-sale Securities, Continuous Unrealized Loss Position |  |
Number of issues, less than 12 months | issue | 6 | 36
Fair value, less than 12 months | $ 47,029 | $ 228,543
Gross unrealized losses, less than 12 months | $ (164) | $ (8,819)
Number of issues, more than 12 months | issue | 29 | 4
Fair value, 12 months or longer | $ 172,623 | $ 19,655
Gross unrealized losses, 12 months or longer | $ (4,775) | (1,641)
U.S. Treasury and federal agency obligations |  |
Available-for-sale securities |  |
Total available-for-sale securities, amortized cost |  | 83,193
Gross unrealized gains |  | 174
Gross unrealized losses |  | (2,394)
Available-for-sale investment securities |  | $ 80,973
Available-for-sale Securities, Continuous Unrealized Loss Position |  |
Number of issues, less than 12 months | issue |  | 10
Fair value, less than 12 months |  | $ 70,799
Gross unrealized losses, less than 12 months |  | $ (2,394)
Number of issues, more than 12 months | issue |  | 0
Fair value, 12 months or longer |  | $ 0
Gross unrealized losses, 12 months or longer |  | 0
Municipal bonds |  |
Available-for-sale securities |  |
Total available-for-sale securities, amortized cost |  | 76,904
Gross unrealized gains |  | 1,826
Gross unrealized losses |  | (140)
Available-for-sale investment securities |  | $ 78,590
Available-for-sale Securities, Continuous Unrealized Loss Position |  |
Number of issues, less than 12 months | issue |  | 3
Fair value, less than 12 months |  | $ 14,478
Gross unrealized losses, less than 12 months |  | $ (140)
Number of issues, more than 12 months | issue |  | 0
Fair value, 12 months or longer |  | $ 0
Gross unrealized losses, 12 months or longer |  | $ 0

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