The total of net (gain) loss, prior service cost (credit), and transition assets (obligations), as well as minimum pension liability if still remaining, included in accumulated other comprehensive income associated with a defined benefit pension or other postretirement plan(s) because they have yet to be recognized as components of net periodic benefit cost. This amount is adjusted for regulatory rate making impacts.

No definition available.

Bank segment - Balance sheet data (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020
Assets
Cash and cash equivalents	$ 175,280			$ 305,551	$ 227,923
Investment securities
Available-for-sale investment securities, at fair value	2,232,336			2,574,618
Held-to-maturity, at amortized cost (fair value of $411,191 and $510,474, respectively)	510,879			522,270
Held-to-maturity investment securities	411,191
Stock in Federal Home Loan Bank, at cost	15,000			10,000
Allowance for credit losses	(70,406)	$ (69,456)		(71,130)	(75,944)	$ (78,252)		$ (101,201)
Total loans, net	5,616,984			5,139,984
Loans held for sale, at lower of cost or fair value	3,101			10,404
Other assets	886,999			747,469
Goodwill	82,190			82,190
Total assets	16,264,868			15,822,637
Liabilities and shareholder’s equity
Other	740,447			669,215
Total liabilities	14,067,653			13,397,460
Retained earnings	826,794			757,921
Accumulated other comprehensive loss, net of tax benefits
Accumulated other comprehensive loss, net of tax benefits	(353,544)			(52,533)
Total shareholders’ equity	2,162,922	$ 2,233,504	$ 2,303,642	2,390,884	$ 2,383,543	$ 2,367,329	$ 2,321,293	$ 2,337,502
Total liabilities and shareholders’ equity	16,264,868			15,822,637
Other assets
Premises and equipment, net	5,599,937			5,392,068
Other assets	886,999			747,469
Other liabilities
Other liabilities	740,447			669,215
American Savings Bank (ASB)
Assets
Cash and due from banks	143,618			100,051
Interest-bearing deposits	6,179			151,189
Cash and cash equivalents	149,797			251,240
Investment securities
Available-for-sale investment securities, at fair value	2,232,336			2,574,618
Held-to-maturity, at amortized cost (fair value of $411,191 and $510,474, respectively)	510,879			522,270
Held-to-maturity investment securities	411,191			510,474
Stock in Federal Home Loan Bank, at cost	15,000			10,000
Loans held for investment	5,687,390			5,211,114
Allowance for credit losses	(70,406)			(71,130)
Total loans, net	5,616,984			5,139,984
Loans held for sale, at lower of cost or fair value	3,101			10,404
Other assets	705,324			590,897
Goodwill	82,190			82,190
Total assets	9,315,611			9,181,603
Liabilities and shareholder’s equity
Deposit liabilities—noninterest-bearing	2,921,857			2,976,632
Deposit liabilities—interest-bearing	5,337,028			5,195,580
Other borrowings	409,040			88,305
Other	198,596			193,268
Total liabilities	8,866,521			8,453,785
Common stock	1			1
Additional paid-in capital	355,293			353,895
Retained earnings	441,796			411,704
Accumulated other comprehensive loss, net of tax benefits
Net unrealized losses on securities	(340,266)			(32,037)
Retirement benefit plans	(7,734)			(5,745)
Accumulated other comprehensive loss, net of tax benefits	(348,000)			(37,782)
Total shareholders’ equity	449,090			727,818
Total liabilities and shareholders’ equity	9,315,611			9,181,603
Other assets
Bank-owned life insurance	181,107			177,566
Premises and equipment, net	196,035			202,299
Accrued interest receivable	23,140			20,854
Mortgage-servicing rights	9,351			9,950
Low-income housing investments	110,700			110,989
Real estate acquired in settlement of loans, net	271			0
Real estate held for sale	3,030			0
Deferred tax asset	120,442			7,699
Other	61,248			61,540
Other assets	705,324			590,897
Other liabilities
Accrued expenses	94,782			87,905
Cashier’s checks	36,393			33,675
Advance payments by borrowers	4,488			9,994
Other	62,933			61,694
Other liabilities	$ 198,596			$ 193,268