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Bank segment - Reconciliation of Income (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Condensed Income Statements, Captions [Line Items] |  |  |  |
Total revenues | $ 685,277 | $ 632,281 | $ 1,331,151 | $ 1,223,843
Less: Retirement defined benefits expense—other than service costs | (1,564) | (1,906) | (3,397) | (3,782)
Total expenses | 606,478 | 554,479 | 1,180,463 | 1,076,303
Operating income | 78,799 | 77,802 | 150,688 | 147,540
Income before income taxes | 59,582 | 59,626 | 112,858 | 111,208
American Savings Bank (ASB) |  |  |  |
Condensed Income Statements, Captions [Line Items] |  |  |  |
Interest and dividend income | 63,261 | 59,080 | 125,263 | 116,802
Total noninterest income | 13,843 | 16,249 | 27,260 | 31,383
Total revenues | 77,104 | 75,329 | 152,523 | 148,185
Total interest expense | 3,677 | 3,135 | 7,130 | 6,054
Provision for loan losses | 2,763 | 2,834 | 6,304 | 6,741
Noninterest expense | 44,150 | 44,564 | 88,075 | 86,434
Less: Retirement defined benefits expense—other than service costs | 403 | 201 | 790 | 396
Total expenses | 50,187 | 50,332 | 100,719 | 98,833
Operating income | 26,917 | 24,997 | 51,804 | 49,352
Income before income taxes | $ 26,514 | $ 24,796 | $ 51,014 | $ 48,956

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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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