Loans and Leases - Amortized Cost Basis by Risk Rating (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Financing Receivable
Loans and leases	$ 53,671,959		$ 53,671,959		$ 52,505,168
Current period gross write-offs
Total	41,238	$ 34,774	97,856	$ 74,565
Commercial portfolio
Financing Receivable
Total financing receivable, Current fiscal year	3,059,938		3,059,938		5,840,676
Total financing receivable, Fiscal year before current fiscal year	5,669,924		5,669,924		6,270,657
Total financing receivable, Two years before current fiscal year	5,745,784		5,745,784		8,293,790
Total financing receivable, Three years before current fiscal year	7,489,096		7,489,096		3,916,614
Total financing receivable, Four years before current fiscal year	3,617,460		3,617,460		2,136,587
Total financing receivable, More than five years before current fiscal year	8,603,091		8,603,091		7,445,782
Revolving Loans Amortized Cost Basis	8,466,585		8,466,585		8,163,895
Loans and leases	42,651,878		42,651,878		42,068,001
Current period gross write-offs
Current fiscal year			2,885		0
Fiscal year before current fiscal year			1,242		17,894
Two years before current fiscal year			21,726		48,257
Three years before current fiscal year			6,035		17,254
Four years before current fiscal year			1,781		25,583
More than five years before current fiscal year			27,423		41,212
Revolving Loans Amortized Cost Basis			34,266		21,260
Total	39,792	$ 33,356	95,358	$ 71,817	171,460
Commercial portfolio | Commercial non-mortgage
Financing Receivable
Total financing receivable, Current fiscal year	1,471,342		1,471,342		3,004,942
Total financing receivable, Fiscal year before current fiscal year	2,730,463		2,730,463		2,109,410
Total financing receivable, Two years before current fiscal year	1,869,270		1,869,270		3,212,637
Total financing receivable, Three years before current fiscal year	2,798,369		2,798,369		1,243,765
Total financing receivable, Four years before current fiscal year	1,251,864		1,251,864		609,387
Total financing receivable, More than five years before current fiscal year	1,674,103		1,674,103		1,279,538
Revolving Loans Amortized Cost Basis	6,929,410		6,929,410		6,578,263
Loans and leases	18,724,821		18,724,821		18,037,942
Current period gross write-offs
Current fiscal year			1,317		0
Fiscal year before current fiscal year			1,242		11,894
Two years before current fiscal year			7,673		45,308
Three years before current fiscal year			5,780		10,668
Four years before current fiscal year			489		3,842
More than five years before current fiscal year			8,960		3,385
Revolving Loans Amortized Cost Basis			18,291		15,169
Total			43,752		90,266
Commercial portfolio | Asset-based
Financing Receivable
Total financing receivable, Current fiscal year	4,412		4,412		1,250
Total financing receivable, Fiscal year before current fiscal year	225		225		14,246
Total financing receivable, Two years before current fiscal year	12,819		12,819		0
Total financing receivable, Three years before current fiscal year	0		0		0
Total financing receivable, Four years before current fiscal year	0		0		0
Total financing receivable, More than five years before current fiscal year	23,070		23,070		26,720
Revolving Loans Amortized Cost Basis	1,309,480		1,309,480		1,361,791
Loans and leases	1,350,006		1,350,006		1,404,007
Current period gross write-offs
Current fiscal year			0		0
Fiscal year before current fiscal year			0		0
Two years before current fiscal year			0		0
Three years before current fiscal year			0		0
Four years before current fiscal year			0		0
More than five years before current fiscal year			0		0
Revolving Loans Amortized Cost Basis			15,975		6,091
Total			15,975		6,091
Commercial portfolio | Commercial real estate
Financing Receivable
Total financing receivable, Current fiscal year	1,260,773		1,260,773		1,867,468
Total financing receivable, Fiscal year before current fiscal year	1,994,560		1,994,560		2,478,882
Total financing receivable, Two years before current fiscal year	2,281,549		2,281,549		3,431,179
Total financing receivable, Three years before current fiscal year	3,015,356		3,015,356		1,621,260
Total financing receivable, Four years before current fiscal year	1,360,029		1,360,029		1,094,418
Total financing receivable, More than five years before current fiscal year	4,416,741		4,416,741		3,792,379
Revolving Loans Amortized Cost Basis	210,698		210,698		206,850
Loans and leases	14,539,706		14,539,706		14,492,436
Current period gross write-offs
Current fiscal year			0		0
Fiscal year before current fiscal year			0		854
Two years before current fiscal year			13,986		1,244
Three years before current fiscal year			255		1,579
Four years before current fiscal year			1,283		15,477
More than five years before current fiscal year			18,216		22,674
Revolving Loans Amortized Cost Basis			0		0
Total			33,740		41,828
Commercial portfolio | Multi-family
Financing Receivable
Total financing receivable, Current fiscal year	112,213		112,213		582,363
Total financing receivable, Fiscal year before current fiscal year	594,573		594,573		1,409,220
Total financing receivable, Two years before current fiscal year	1,363,942		1,363,942		1,424,552
Total financing receivable, Three years before current fiscal year	1,486,004		1,486,004		908,165
Total financing receivable, Four years before current fiscal year	905,560		905,560		343,430
Total financing receivable, More than five years before current fiscal year	2,339,780		2,339,780		2,213,879
Revolving Loans Amortized Cost Basis	16,997		16,997		16,991
Loans and leases	6,819,069		6,819,069		6,898,600
Current period gross write-offs
Current fiscal year			0		0
Fiscal year before current fiscal year			0		0
Two years before current fiscal year			0		0
Three years before current fiscal year			0		4,955
Four years before current fiscal year			0		6,264
More than five years before current fiscal year			247		11,678
Revolving Loans Amortized Cost Basis			0		0
Total			247		22,897
Commercial portfolio | Equipment financing
Financing Receivable
Total financing receivable, Current fiscal year	211,198		211,198		384,653
Total financing receivable, Fiscal year before current fiscal year	350,103		350,103		258,899
Total financing receivable, Two years before current fiscal year	218,204		218,204		225,422
Total financing receivable, Three years before current fiscal year	189,367		189,367		143,424
Total financing receivable, Four years before current fiscal year	100,007		100,007		89,352
Total financing receivable, More than five years before current fiscal year	149,397		149,397		133,266
Revolving Loans Amortized Cost Basis	0		0		0
Loans and leases	1,218,276		1,218,276		1,235,016
Current period gross write-offs
Current fiscal year			1,568		0
Fiscal year before current fiscal year			0		5,146
Two years before current fiscal year			67		1,705
Three years before current fiscal year			0		52
Four years before current fiscal year			9		0
More than five years before current fiscal year			0		3,475
Revolving Loans Amortized Cost Basis			0		0
Total			1,644		10,378
Pass | Commercial portfolio | Commercial non-mortgage
Financing Receivable
Total financing receivable, Current fiscal year	1,426,513		1,426,513		2,917,048
Total financing receivable, Fiscal year before current fiscal year	2,647,354		2,647,354		1,916,905
Total financing receivable, Two years before current fiscal year	1,654,046		1,654,046		2,818,720
Total financing receivable, Three years before current fiscal year	2,464,246		2,464,246		1,100,575
Total financing receivable, Four years before current fiscal year	1,161,443		1,161,443		562,252
Total financing receivable, More than five years before current fiscal year	1,581,608		1,581,608		1,211,312
Revolving Loans Amortized Cost Basis	6,721,873		6,721,873		6,325,637
Loans and leases	17,657,083		17,657,083		16,852,449
Pass | Commercial portfolio | Asset-based
Financing Receivable
Total financing receivable, Current fiscal year	2,850		2,850		1,250
Total financing receivable, Fiscal year before current fiscal year	225		225		11,684
Total financing receivable, Two years before current fiscal year	10,311		10,311		0
Total financing receivable, Three years before current fiscal year	0		0		0
Total financing receivable, Four years before current fiscal year	0		0		0
Total financing receivable, More than five years before current fiscal year	18,246		18,246		20,255
Revolving Loans Amortized Cost Basis	1,078,602		1,078,602		1,132,901
Loans and leases	1,110,234		1,110,234		1,166,090
Pass | Commercial portfolio | Commercial real estate
Financing Receivable
Total financing receivable, Current fiscal year	1,260,773		1,260,773		1,867,468
Total financing receivable, Fiscal year before current fiscal year	1,991,259		1,991,259		2,334,965
Total financing receivable, Two years before current fiscal year	2,114,596		2,114,596		3,186,098
Total financing receivable, Three years before current fiscal year	2,801,954		2,801,954		1,462,814
Total financing receivable, Four years before current fiscal year	1,277,393		1,277,393		944,367
Total financing receivable, More than five years before current fiscal year	3,970,260		3,970,260		3,465,817
Revolving Loans Amortized Cost Basis	209,486		209,486		197,998
Loans and leases	13,625,721		13,625,721		13,459,527
Pass | Commercial portfolio | Multi-family
Financing Receivable
Total financing receivable, Current fiscal year	112,060		112,060		582,363
Total financing receivable, Fiscal year before current fiscal year	594,573		594,573		1,394,855
Total financing receivable, Two years before current fiscal year	1,349,648		1,349,648		1,314,395
Total financing receivable, Three years before current fiscal year	1,354,503		1,354,503		862,273
Total financing receivable, Four years before current fiscal year	855,885		855,885		245,802
Total financing receivable, More than five years before current fiscal year	2,164,313		2,164,313		2,179,207
Revolving Loans Amortized Cost Basis	16,997		16,997		16,991
Loans and leases	6,447,979		6,447,979		6,595,886
Pass | Commercial portfolio | Equipment financing
Financing Receivable
Total financing receivable, Current fiscal year	207,586		207,586		382,783
Total financing receivable, Fiscal year before current fiscal year	349,272		349,272		242,440
Total financing receivable, Two years before current fiscal year	202,534		202,534		207,081
Total financing receivable, Three years before current fiscal year	160,138		160,138		126,399
Total financing receivable, Four years before current fiscal year	88,827		88,827		83,838
Total financing receivable, More than five years before current fiscal year	140,480		140,480		124,910
Revolving Loans Amortized Cost Basis	0		0		0
Loans and leases	1,148,837		1,148,837		1,167,451
Special mention | Commercial portfolio | Commercial non-mortgage
Financing Receivable
Total financing receivable, Current fiscal year	0		0		31,587
Total financing receivable, Fiscal year before current fiscal year	36,433		36,433		66,770
Total financing receivable, Two years before current fiscal year	59,114		59,114		156,555
Total financing receivable, Three years before current fiscal year	126,804		126,804		51,055
Total financing receivable, Four years before current fiscal year	91		91		30,669
Total financing receivable, More than five years before current fiscal year	0		0		4,203
Revolving Loans Amortized Cost Basis	34,158		34,158		44,017
Loans and leases	256,600		256,600		384,856
Special mention | Commercial portfolio | Asset-based
Financing Receivable
Total financing receivable, Current fiscal year	1,562		1,562		0
Total financing receivable, Fiscal year before current fiscal year	0		0		0
Total financing receivable, Two years before current fiscal year	0		0		0
Total financing receivable, Three years before current fiscal year	0		0		0
Total financing receivable, Four years before current fiscal year	0		0		0
Total financing receivable, More than five years before current fiscal year	4,818		4,818		5,226
Revolving Loans Amortized Cost Basis	40,524		40,524		90,372
Loans and leases	46,904		46,904		95,598
Special mention | Commercial portfolio | Commercial real estate
Financing Receivable
Total financing receivable, Current fiscal year	0		0		0
Total financing receivable, Fiscal year before current fiscal year	0		0		12,809
Total financing receivable, Two years before current fiscal year	32,092		32,092		175,252
Total financing receivable, Three years before current fiscal year	148,656		148,656		37,307
Total financing receivable, Four years before current fiscal year	0		0		37,469
Total financing receivable, More than five years before current fiscal year	82,073		82,073		64,483
Revolving Loans Amortized Cost Basis	0		0		0
Loans and leases	262,821		262,821		327,320
Special mention | Commercial portfolio | Multi-family
Financing Receivable
Total financing receivable, Current fiscal year	153		153		0
Total financing receivable, Fiscal year before current fiscal year	0		0		14,365
Total financing receivable, Two years before current fiscal year	0		0		93,396
Total financing receivable, Three years before current fiscal year	114,867		114,867		18,790
Total financing receivable, Four years before current fiscal year	22,725		22,725		70,908
Total financing receivable, More than five years before current fiscal year	105,713		105,713		8,588
Revolving Loans Amortized Cost Basis	0		0		0
Loans and leases	243,458		243,458		206,047
Special mention | Commercial portfolio | Equipment financing
Financing Receivable
Total financing receivable, Current fiscal year	0		0		1,298
Total financing receivable, Fiscal year before current fiscal year	0		0		231
Total financing receivable, Two years before current fiscal year	4,711		4,711		0
Total financing receivable, Three years before current fiscal year	13,511		13,511		55
Total financing receivable, Four years before current fiscal year	464		464		0
Total financing receivable, More than five years before current fiscal year	1,350		1,350		0
Revolving Loans Amortized Cost Basis	0		0		0
Loans and leases	20,036		20,036		1,584
Substandard | Commercial portfolio | Commercial non-mortgage
Financing Receivable
Total financing receivable, Current fiscal year	44,829		44,829		56,307
Total financing receivable, Fiscal year before current fiscal year	46,676		46,676		125,735
Total financing receivable, Two years before current fiscal year	156,110		156,110		237,362
Total financing receivable, Three years before current fiscal year	207,319		207,319		92,134
Total financing receivable, Four years before current fiscal year	90,287		90,287		16,466
Total financing receivable, More than five years before current fiscal year	92,189		92,189		63,998
Revolving Loans Amortized Cost Basis	173,378		173,378		208,608
Loans and leases	810,788		810,788		800,610
Substandard | Commercial portfolio | Asset-based
Financing Receivable
Total financing receivable, Current fiscal year	0		0		0
Total financing receivable, Fiscal year before current fiscal year	0		0		2,562
Total financing receivable, Two years before current fiscal year	2,508		2,508		0
Total financing receivable, Three years before current fiscal year	0		0		0
Total financing receivable, Four years before current fiscal year	0		0		0
Total financing receivable, More than five years before current fiscal year	6		6		1,239
Revolving Loans Amortized Cost Basis	190,354		190,354		138,518
Loans and leases	192,868		192,868		142,319
Substandard | Commercial portfolio | Commercial real estate
Financing Receivable
Total financing receivable, Current fiscal year	0		0		0
Total financing receivable, Fiscal year before current fiscal year	3,301		3,301		131,108
Total financing receivable, Two years before current fiscal year	134,861		134,861		69,829
Total financing receivable, Three years before current fiscal year	64,746		64,746		121,139
Total financing receivable, Four years before current fiscal year	82,636		82,636		112,582
Total financing receivable, More than five years before current fiscal year	364,408		364,408		262,079
Revolving Loans Amortized Cost Basis	1,212		1,212		8,852
Loans and leases	651,164		651,164		705,589
Substandard | Commercial portfolio | Multi-family
Financing Receivable
Total financing receivable, Current fiscal year	0		0		0
Total financing receivable, Fiscal year before current fiscal year	0		0		0
Total financing receivable, Two years before current fiscal year	14,294		14,294		16,761
Total financing receivable, Three years before current fiscal year	16,634		16,634		27,102
Total financing receivable, Four years before current fiscal year	26,950		26,950		26,720
Total financing receivable, More than five years before current fiscal year	69,754		69,754		26,084
Revolving Loans Amortized Cost Basis	0		0		0
Loans and leases	127,632		127,632		96,667
Substandard | Commercial portfolio | Equipment financing
Financing Receivable
Total financing receivable, Current fiscal year	3,612		3,612		572
Total financing receivable, Fiscal year before current fiscal year	831		831		16,228
Total financing receivable, Two years before current fiscal year	10,959		10,959		18,341
Total financing receivable, Three years before current fiscal year	15,718		15,718		16,970
Total financing receivable, Four years before current fiscal year	10,716		10,716		5,514
Total financing receivable, More than five years before current fiscal year	7,567		7,567		8,356
Revolving Loans Amortized Cost Basis	0		0		0
Loans and leases	49,403		49,403		65,981
Doubtful | Commercial portfolio | Commercial non-mortgage
Financing Receivable
Total financing receivable, Current fiscal year	0		0		0
Total financing receivable, Fiscal year before current fiscal year	0		0		0
Total financing receivable, Two years before current fiscal year	0		0		0
Total financing receivable, Three years before current fiscal year	0		0		1
Total financing receivable, Four years before current fiscal year	43		43		0
Total financing receivable, More than five years before current fiscal year	306		306		25
Revolving Loans Amortized Cost Basis	1		1		1
Loans and leases	$ 350		$ 350		$ 27