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Bank segment - Reconciliation of Income (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Condensed Income Statements, Captions [Line Items] |  |  |  |
Total revenues | $ 768,048 | $ 673,185 | $ 2,099,199 | $ 1,897,028
Less: Retirement defined benefits expense—other than service costs | (1,276) | (1,928) | (4,673) | (5,710)
Total expenses | 669,984 | 561,712 | 1,850,447 | 1,638,015
Operating income | 98,064 | 111,473 | 248,752 | 259,013
Income before income taxes | 77,233 | 95,139 | 190,091 | 206,347
American Savings Bank (ASB) |  |  |  |
Condensed Income Statements, Captions [Line Items] |  |  |  |
Interest and dividend income | 65,185 | 59,060 | 190,448 | 175,862
Total noninterest income | 15,311 | 15,229 | 42,571 | 46,612
Total revenues | 80,496 | 74,289 | 233,019 | 222,474
Total interest expense | 4,039 | 2,914 | 11,169 | 8,968
Provision for loan losses | 6,033 | 490 | 12,337 | 7,231
Noninterest expense | 43,593 | 44,121 | 131,668 | 130,555
Less: Retirement defined benefits expense—other than service costs | 433 | 212 | 1,223 | 608
Total expenses | 53,232 | 47,313 | 153,951 | 146,146
Operating income | 27,264 | 26,976 | 79,068 | 76,328
Income before income taxes | $ 26,831 | $ 26,764 | $ 77,845 | $ 75,720

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- Definition Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 20 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=68072869&loc=d3e41242-110953 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(10)) -URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(8)) -URI http://asc.fasb.org/extlink&oid=114873790&loc=SL114874131-224263 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=109234566&loc=d3e22694-107794 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(15)) -URI http://asc.fasb.org/extlink&oid=114873765&loc=SL114874048-224260 + Details
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- Definition Represents the total of interest and dividend income, including any amortization and accretion (as applicable) of discounts and premiums, earned from (1) loans and leases whether held-for-sale or held-in-portfolio; (2) investment securities; (3) federal funds sold; (4) securities purchased under agreements to resell; (5) investments in banker's acceptances, commercial paper, or certificates of deposit; (6) dividend income; or (7) other investments not otherwise specified herein. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.1-5) -URI http://asc.fasb.org/extlink&oid=114873765&loc=SL114874048-224260 + Details
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