Loans Receivable and Allowance for Credit Losses - Credit Risk Ratings , Vintage Years and/or Gross Write-offs for Loans Held-for-Investment by Portfolio Segment (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Financing Receivable, Vintage Year/Credit Quality Indicator [Line Items]
Current Fiscal Year	$ 7,090,395,000		$ 7,090,395,000		$ 12,464,897,000
One Year before Current Fiscal Year	11,425,642,000		11,425,642,000		8,204,714,000
Two Years before Current Fiscal Year	7,265,279,000		7,265,279,000		4,810,435,000
Three Years before Current Fiscal Year	4,206,435,000		4,206,435,000		3,871,740,000
Four Years before Current Fiscal Year	3,487,616,000		3,487,616,000		2,936,646,000
Prior	6,094,731,000		6,094,731,000		4,261,980,000
Revolving Loans	11,129,338,000		11,129,338,000		11,460,495,000
Revolving Loans Converted to Term Loans	207,748,000		207,748,000		191,523,000
Total	50,907,184,000		50,907,184,000		48,202,430,000
YTD gross write-offs Total	3,600,000	$ 8,700,000	4,200,000	$ 8,900,000
Pass
Financing Receivable, Vintage Year/Credit Quality Indicator [Line Items]
Current Fiscal Year	6,959,365,000		6,959,365,000		12,365,799,000
One Year before Current Fiscal Year	11,283,760,000		11,283,760,000		8,084,723,000
Two Years before Current Fiscal Year	7,094,524,000		7,094,524,000		4,590,045,000
Three Years before Current Fiscal Year	4,046,247,000		4,046,247,000		3,791,578,000
Four Years before Current Fiscal Year	3,425,935,000		3,425,935,000		2,786,218,000
Prior	5,852,417,000		5,852,417,000		4,158,181,000
Revolving Loans	11,020,577,000		11,020,577,000		11,359,948,000
Revolving Loans Converted to Term Loans	202,674,000		202,674,000		169,958,000
Total	49,885,499,000		49,885,499,000		47,306,450,000
Pass | Federal Housing Administration Loan
Financing Receivable, Vintage Year/Credit Quality Indicator [Line Items]
Financing Receivable, 90 Days or More Past Due, Still Accruing	638,000		638,000		818,000
Criticized (accrual)
Financing Receivable, Vintage Year/Credit Quality Indicator [Line Items]
Current Fiscal Year	127,030,000		127,030,000		80,235,000
One Year before Current Fiscal Year	128,019,000		128,019,000		96,150,000
Two Years before Current Fiscal Year	166,040,000		166,040,000		208,970,000
Three Years before Current Fiscal Year	147,439,000		147,439,000		76,486,000
Four Years before Current Fiscal Year	52,160,000		52,160,000		142,072,000
Prior	190,131,000		190,131,000		76,117,000
Revolving Loans	106,841,000		106,841,000		99,447,000
Revolving Loans Converted to Term Loans	963,000		963,000		17,795,000
Total	918,623,000		918,623,000		797,272,000
Criticized (nonaccrual)
Financing Receivable, Vintage Year/Credit Quality Indicator [Line Items]
Current Fiscal Year	4,000,000		4,000,000		18,863,000
One Year before Current Fiscal Year	13,863,000		13,863,000		23,841,000
Two Years before Current Fiscal Year	4,715,000		4,715,000		11,420,000
Three Years before Current Fiscal Year	12,749,000		12,749,000		3,676,000
Four Years before Current Fiscal Year	9,521,000		9,521,000		8,356,000
Prior	52,183,000		52,183,000		27,682,000
Revolving Loans	1,920,000		1,920,000		1,100,000
Revolving Loans Converted to Term Loans	4,111,000		4,111,000		3,770,000
Total	103,062,000		103,062,000		98,708,000
YTD gross write-offs
Financing Receivable, Vintage Year/Credit Quality Indicator [Line Items]
YTD gross write-offs Current Fiscal Year			350,000
YTD gross write-offs One Year before Current Fiscal Year			28,000
YTD gross write-offs Two Years before Current Fiscal Year			161,000
YTD gross write-offs Three Years before Current Fiscal Year			15,000
YTD gross write-offs Four Years before Current Fiscal Year			6,606,000
YTD gross write-offs Prior			12,257,000
YTD gross write-offs Revolving Loans			0
YTD gross write-offs Revolving Loans Converted to Term Loans			6,000
YTD gross write-offs Total			19,423,000
Consumer Loan
Financing Receivable, Vintage Year/Credit Quality Indicator [Line Items]
Converted to term loan	20,600,000	375,000	27,700,000	375,000
Commercial lending
Financing Receivable, Vintage Year/Credit Quality Indicator [Line Items]
Current Fiscal Year	4,682,705,000		4,682,705,000		8,898,251,000
One Year before Current Fiscal Year	8,009,201,000		8,009,201,000		5,745,996,000
Two Years before Current Fiscal Year	4,932,591,000		4,932,591,000		3,020,575,000
Three Years before Current Fiscal Year	2,563,247,000		2,563,247,000		2,761,676,000
Four Years before Current Fiscal Year	2,470,541,000		2,470,541,000		2,111,867,000
Prior	4,002,714,000		4,002,714,000		2,719,920,000
Revolving Loans	9,484,122,000		9,484,122,000		9,462,895,000
Revolving Loans Converted to Term Loans	84,586,000		84,586,000		59,273,000
Total	36,229,707,000		36,229,707,000		34,780,453,000
Converted to term loan	11,200,000	$ 0	24,600,000	$ 26,400,000
Commercial lending | YTD gross write-offs
Financing Receivable, Vintage Year/Credit Quality Indicator [Line Items]
YTD gross write-offs Current Fiscal Year			350,000
YTD gross write-offs One Year before Current Fiscal Year			28,000
YTD gross write-offs Two Years before Current Fiscal Year			161,000
YTD gross write-offs Three Years before Current Fiscal Year			15,000
YTD gross write-offs Four Years before Current Fiscal Year			6,606,000
YTD gross write-offs Prior			12,216,000
YTD gross write-offs Revolving Loans			0
YTD gross write-offs Revolving Loans Converted to Term Loans			0
YTD gross write-offs Total			19,376,000
Commercial lending | Commercial and industrial (“C&I”)
Financing Receivable, Vintage Year/Credit Quality Indicator [Line Items]
Current Fiscal Year	1,949,375,000		1,949,375,000		2,922,766,000
One Year before Current Fiscal Year	2,063,639,000		2,063,639,000		2,092,308,000
Two Years before Current Fiscal Year	1,562,103,000		1,562,103,000		682,520,000
Three Years before Current Fiscal Year	408,413,000		408,413,000		426,477,000
Four Years before Current Fiscal Year	291,079,000		291,079,000		170,234,000
Prior	209,498,000		209,498,000		120,853,000
Revolving Loans	9,359,687,000		9,359,687,000		9,275,389,000
Revolving Loans Converted to Term Loans	20,248,000		20,248,000		20,548,000
Total	15,864,042,000		15,864,042,000		15,711,095,000
Commercial lending | Commercial and industrial (“C&I”) | Pass
Financing Receivable, Vintage Year/Credit Quality Indicator [Line Items]
Current Fiscal Year	1,858,749,000		1,858,749,000		2,831,834,000
One Year before Current Fiscal Year	1,942,241,000		1,942,241,000		2,053,215,000
Two Years before Current Fiscal Year	1,470,818,000		1,470,818,000		623,026,000
Three Years before Current Fiscal Year	354,650,000		354,650,000		392,013,000
Four Years before Current Fiscal Year	259,342,000		259,342,000		143,970,000
Prior	164,149,000		164,149,000		97,605,000
Revolving Loans	9,254,852,000		9,254,852,000		9,177,401,000
Revolving Loans Converted to Term Loans	20,248,000		20,248,000		20,548,000
Total	15,325,049,000		15,325,049,000		15,339,612,000
Commercial lending | Commercial and industrial (“C&I”) | Criticized (accrual)
Financing Receivable, Vintage Year/Credit Quality Indicator [Line Items]
Current Fiscal Year	88,542,000		88,542,000		72,210,000
One Year before Current Fiscal Year	110,918,000		110,918,000		34,296,000
Two Years before Current Fiscal Year	91,272,000		91,272,000		48,761,000
Three Years before Current Fiscal Year	45,069,000		45,069,000		34,221,000
Four Years before Current Fiscal Year	25,603,000		25,603,000		20,646,000
Prior	23,640,000		23,640,000		12,933,000
Revolving Loans	104,802,000		104,802,000		97,988,000
Revolving Loans Converted to Term Loans	0		0		0
Total	489,846,000		489,846,000		321,055,000
Commercial lending | Commercial and industrial (“C&I”) | Criticized (nonaccrual)
Financing Receivable, Vintage Year/Credit Quality Indicator [Line Items]
Current Fiscal Year	2,084,000		2,084,000		18,722,000
One Year before Current Fiscal Year	10,480,000		10,480,000		4,797,000
Two Years before Current Fiscal Year	13,000		13,000		10,733,000
Three Years before Current Fiscal Year	8,694,000		8,694,000		243,000
Four Years before Current Fiscal Year	6,134,000		6,134,000		5,618,000
Prior	21,709,000		21,709,000		10,315,000
Revolving Loans	33,000		33,000		0
Revolving Loans Converted to Term Loans	0		0		0
Total	49,147,000		49,147,000		50,428,000
Commercial lending | Commercial and industrial (“C&I”) | YTD gross write-offs
Financing Receivable, Vintage Year/Credit Quality Indicator [Line Items]
YTD gross write-offs Current Fiscal Year			350,000
YTD gross write-offs One Year before Current Fiscal Year			28,000
YTD gross write-offs Two Years before Current Fiscal Year			161,000
YTD gross write-offs Three Years before Current Fiscal Year			15,000
YTD gross write-offs Four Years before Current Fiscal Year			6,606,000
YTD gross write-offs Prior			1,684,000
YTD gross write-offs Revolving Loans			0
YTD gross write-offs Revolving Loans Converted to Term Loans			0
YTD gross write-offs Total			8,844,000
Commercial lending | CRE
Financing Receivable, Vintage Year/Credit Quality Indicator [Line Items]
Current Fiscal Year	2,103,260,000		2,103,260,000		4,182,298,000
One Year before Current Fiscal Year	4,095,527,000		4,095,527,000		2,484,251,000
Two Years before Current Fiscal Year	2,280,068,000		2,280,068,000		1,664,574,000
Three Years before Current Fiscal Year	1,496,985,000		1,496,985,000		1,811,774,000
Four Years before Current Fiscal Year	1,674,163,000		1,674,163,000		1,562,842,000
Prior	2,852,514,000		2,852,514,000		1,946,298,000
Revolving Loans	101,811,000		101,811,000		167,108,000
Revolving Loans Converted to Term Loans	63,050,000		63,050,000		38,725,000
Total	14,667,378,000		14,667,378,000		13,857,870,000
Commercial lending | CRE | Pass
Financing Receivable, Vintage Year/Credit Quality Indicator [Line Items]
Current Fiscal Year	2,066,361,000		2,066,361,000		4,178,780,000
One Year before Current Fiscal Year	4,080,810,000		4,080,810,000		2,404,634,000
Two Years before Current Fiscal Year	2,259,761,000		2,259,761,000		1,505,150,000
Three Years before Current Fiscal Year	1,396,114,000		1,396,114,000		1,771,679,000
Four Years before Current Fiscal Year	1,649,168,000		1,649,168,000		1,471,710,000
Prior	2,722,697,000		2,722,697,000		1,909,925,000
Revolving Loans	101,811,000		101,811,000		165,653,000
Revolving Loans Converted to Term Loans	63,050,000		63,050,000		22,009,000
Total	14,339,772,000		14,339,772,000		13,429,540,000
Commercial lending | CRE | Criticized (accrual)
Financing Receivable, Vintage Year/Credit Quality Indicator [Line Items]
Current Fiscal Year	36,899,000		36,899,000		3,518,000
One Year before Current Fiscal Year	14,717,000		14,717,000		60,573,000
Two Years before Current Fiscal Year	20,307,000		20,307,000		159,424,000
Three Years before Current Fiscal Year	100,871,000		100,871,000		40,095,000
Four Years before Current Fiscal Year	24,544,000		24,544,000		91,132,000
Prior	129,658,000		129,658,000		32,173,000
Revolving Loans	0		0		1,455,000
Revolving Loans Converted to Term Loans	0		0		16,716,000
Total	326,996,000		326,996,000		405,086,000
Commercial lending | CRE | Criticized (nonaccrual)
Financing Receivable, Vintage Year/Credit Quality Indicator [Line Items]
Current Fiscal Year	0		0		0
One Year before Current Fiscal Year	0		0		19,044,000
Two Years before Current Fiscal Year	0		0		0
Three Years before Current Fiscal Year	0		0		0
Four Years before Current Fiscal Year	451,000		451,000		0
Prior	159,000		159,000		4,200,000
Revolving Loans	0		0		0
Revolving Loans Converted to Term Loans	0		0		0
Total	610,000		610,000		23,244,000
Commercial lending | CRE | YTD gross write-offs
Financing Receivable, Vintage Year/Credit Quality Indicator [Line Items]
YTD gross write-offs Current Fiscal Year			0
YTD gross write-offs One Year before Current Fiscal Year			0
YTD gross write-offs Two Years before Current Fiscal Year			0
YTD gross write-offs Three Years before Current Fiscal Year			0
YTD gross write-offs Four Years before Current Fiscal Year			0
YTD gross write-offs Prior			119,000
YTD gross write-offs Revolving Loans			0
YTD gross write-offs Revolving Loans Converted to Term Loans			0
YTD gross write-offs Total			119,000
Commercial lending | Real estate loan | Multifamily residential
Financing Receivable, Vintage Year/Credit Quality Indicator [Line Items]
Current Fiscal Year	478,895,000		478,895,000		1,500,289,000
One Year before Current Fiscal Year	1,495,620,000		1,495,620,000		892,598,000
Two Years before Current Fiscal Year	867,946,000		867,946,000		641,677,000
Three Years before Current Fiscal Year	620,117,000		620,117,000		520,321,000
Four Years before Current Fiscal Year	504,487,000		504,487,000		354,320,000
Prior	924,086,000		924,086,000		652,538,000
Revolving Loans	7,658,000		7,658,000		11,325,000
Revolving Loans Converted to Term Loans	1,288,000		1,288,000		0
Total	4,900,097,000		4,900,097,000		4,573,068,000
Commercial lending | Real estate loan | Pass | Multifamily residential
Financing Receivable, Vintage Year/Credit Quality Indicator [Line Items]
Current Fiscal Year	478,895,000		478,895,000		1,500,289,000
One Year before Current Fiscal Year	1,495,620,000		1,495,620,000		892,598,000
Two Years before Current Fiscal Year	814,391,000		814,391,000		641,677,000
Three Years before Current Fiscal Year	620,117,000		620,117,000		519,614,000
Four Years before Current Fiscal Year	503,791,000		503,791,000		350,044,000
Prior	893,282,000		893,282,000		625,293,000
Revolving Loans	7,658,000		7,658,000		11,325,000
Revolving Loans Converted to Term Loans	1,288,000		1,288,000		0
Total	4,815,042,000		4,815,042,000		4,540,840,000
Commercial lending | Real estate loan | Criticized (accrual) | Multifamily residential
Financing Receivable, Vintage Year/Credit Quality Indicator [Line Items]
Current Fiscal Year	0		0		0
One Year before Current Fiscal Year	0		0		0
Two Years before Current Fiscal Year	53,555,000		53,555,000		0
Three Years before Current Fiscal Year	0		0		707,000
Four Years before Current Fiscal Year	696,000		696,000		4,276,000
Prior	26,124,000		26,124,000		27,076,000
Revolving Loans	0		0		0
Revolving Loans Converted to Term Loans	0		0		0
Total	80,375,000		80,375,000		32,059,000
Commercial lending | Real estate loan | Criticized (nonaccrual) | Multifamily residential
Financing Receivable, Vintage Year/Credit Quality Indicator [Line Items]
Current Fiscal Year	0		0		0
One Year before Current Fiscal Year	0		0		0
Two Years before Current Fiscal Year	0		0		0
Three Years before Current Fiscal Year	0		0		0
Four Years before Current Fiscal Year	0		0		0
Prior	4,680,000		4,680,000		169,000
Revolving Loans	0		0		0
Revolving Loans Converted to Term Loans	0		0		0
Total	4,680,000		4,680,000		169,000
Commercial lending | Construction and land
Financing Receivable, Vintage Year/Credit Quality Indicator [Line Items]
Current Fiscal Year	151,175,000		151,175,000		292,898,000
One Year before Current Fiscal Year	354,415,000		354,415,000		276,839,000
Two Years before Current Fiscal Year	222,474,000		222,474,000		31,804,000
Three Years before Current Fiscal Year	37,732,000		37,732,000		3,104,000
Four Years before Current Fiscal Year	812,000		812,000		24,471,000
Prior	16,616,000		16,616,000		231,000
Revolving Loans	14,966,000		14,966,000		9,073,000
Revolving Loans Converted to Term Loans	0		0		0
Total	798,190,000		798,190,000		638,420,000
Commercial lending | Construction and land | Pass
Financing Receivable, Vintage Year/Credit Quality Indicator [Line Items]
Current Fiscal Year	151,175,000		151,175,000		288,394,000
One Year before Current Fiscal Year	354,415,000		354,415,000		276,839,000
Two Years before Current Fiscal Year	222,474,000		222,474,000		31,804,000
Three Years before Current Fiscal Year	37,732,000		37,732,000		3,104,000
Four Years before Current Fiscal Year	812,000		812,000		2,805,000
Prior	5,475,000		5,475,000		231,000
Revolving Loans	14,966,000		14,966,000		9,073,000
Revolving Loans Converted to Term Loans	0		0		0
Total	787,049,000		787,049,000		612,250,000
Commercial lending | Construction and land | Criticized (accrual)
Financing Receivable, Vintage Year/Credit Quality Indicator [Line Items]
Current Fiscal Year					4,504,000
One Year before Current Fiscal Year					0
Two Years before Current Fiscal Year					0
Three Years before Current Fiscal Year					0
Four Years before Current Fiscal Year					21,666,000
Prior					0
Revolving Loans					0
Revolving Loans Converted to Term Loans					0
Total					26,170,000
Commercial lending | Construction and land | Criticized (nonaccrual)
Financing Receivable, Vintage Year/Credit Quality Indicator [Line Items]
Current Fiscal Year	0		0
One 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
Prior	11,141,000		11,141,000
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total	11,141,000		11,141,000
Commercial lending | Construction and land | YTD gross write-offs
Financing Receivable, Vintage Year/Credit Quality Indicator [Line Items]
YTD gross write-offs Current Fiscal Year			0
YTD gross write-offs One Year before Current Fiscal Year			0
YTD gross write-offs Two Years before Current Fiscal Year			0
YTD gross write-offs Three Years before Current Fiscal Year			0
YTD gross write-offs Four Years before Current Fiscal Year			0
YTD gross write-offs Prior			10,413,000
YTD gross write-offs Revolving Loans			0
YTD gross write-offs Revolving Loans Converted to Term Loans			0
YTD gross write-offs Total			10,413,000
Commercial lending | Total CRE
Financing Receivable, Vintage Year/Credit Quality Indicator [Line Items]
Current Fiscal Year	2,733,330,000		2,733,330,000		5,975,485,000
One Year before Current Fiscal Year	5,945,562,000		5,945,562,000		3,653,688,000
Two Years before Current Fiscal Year	3,370,488,000		3,370,488,000		2,338,055,000
Three Years before Current Fiscal Year	2,154,834,000		2,154,834,000		2,335,199,000
Four Years before Current Fiscal Year	2,179,462,000		2,179,462,000		1,941,633,000
Prior	3,793,216,000		3,793,216,000		2,599,067,000
Revolving Loans	124,435,000		124,435,000		187,506,000
Revolving Loans Converted to Term Loans	64,338,000		64,338,000		38,725,000
Total	20,365,665,000		20,365,665,000		19,069,358,000
Commercial lending | Total CRE | YTD gross write-offs
Financing Receivable, Vintage Year/Credit Quality Indicator [Line Items]
YTD gross write-offs Current Fiscal Year			0
YTD gross write-offs One Year before Current Fiscal Year			0
YTD gross write-offs Two Years before Current Fiscal Year			0
YTD gross write-offs Three Years before Current Fiscal Year			0
YTD gross write-offs Four Years before Current Fiscal Year			0
YTD gross write-offs Prior			10,532,000
YTD gross write-offs Revolving Loans			0
YTD gross write-offs Revolving Loans Converted to Term Loans			0
YTD gross write-offs Total			10,532,000
Consumer lending
Financing Receivable, Vintage Year/Credit Quality Indicator [Line Items]
Current Fiscal Year	2,407,690,000		2,407,690,000		3,566,646,000
One Year before Current Fiscal Year	3,416,441,000		3,416,441,000		2,458,718,000
Two Years before Current Fiscal Year	2,332,688,000		2,332,688,000		1,789,860,000
Three Years before Current Fiscal Year	1,643,188,000		1,643,188,000		1,110,064,000
Four Years before Current Fiscal Year	1,017,075,000		1,017,075,000		824,779,000
Prior	2,092,017,000		2,092,017,000		1,542,060,000
Revolving Loans	1,645,216,000		1,645,216,000		1,997,600,000
Revolving Loans Converted to Term Loans	123,162,000		123,162,000		132,250,000
Total	14,677,477,000		14,677,477,000		13,421,977,000
Consumer lending | YTD gross write-offs
Financing Receivable, Vintage Year/Credit Quality Indicator [Line Items]
YTD gross write-offs Current Fiscal Year			0
YTD gross write-offs One Year before Current Fiscal Year			0
YTD gross write-offs Two Years before Current Fiscal Year			0
YTD gross write-offs Three Years before Current Fiscal Year			0
YTD gross write-offs Four Years before Current Fiscal Year			0
YTD gross write-offs Prior			41,000
YTD gross write-offs Revolving Loans			0
YTD gross write-offs Revolving Loans Converted to Term Loans			6,000
YTD gross write-offs Total			47,000
Consumer lending | Real estate loan | Single-family residential
Financing Receivable, Vintage Year/Credit Quality Indicator [Line Items]
Current Fiscal Year	2,403,208,000		2,403,208,000		3,549,035,000
One Year before Current Fiscal Year	3,395,557,000		3,395,557,000		2,454,992,000
Two Years before Current Fiscal Year	2,326,755,000		2,326,755,000		1,776,685,000
Three Years before Current Fiscal Year	1,637,511,000		1,637,511,000		1,106,630,000
Four Years before Current Fiscal Year	1,014,691,000		1,014,691,000		823,237,000
Prior	2,058,836,000		2,058,836,000		1,512,448,000
Revolving Loans	0		0		0
Revolving Loans Converted to Term Loans	0		0		0
Total	12,836,558,000		12,836,558,000		11,223,027,000
Consumer lending | Real estate loan | Pass | Single-family residential
Financing Receivable, Vintage Year/Credit Quality Indicator [Line Items]
Current Fiscal Year	2,400,448,000		2,400,448,000		3,548,894,000
One Year before Current Fiscal Year	3,390,708,000		3,390,708,000		2,453,717,000
Two Years before Current Fiscal Year	2,321,209,000		2,321,209,000		1,775,696,000
Three Years before Current Fiscal Year	1,633,316,000		1,633,316,000		1,101,965,000
Four Years before Current Fiscal Year	1,010,859,000		1,010,859,000		817,164,000
Prior	2,040,678,000		2,040,678,000		1,500,359,000
Revolving Loans	0		0		0
Revolving Loans Converted to Term Loans	0		0		0
Total	12,797,218,000		12,797,218,000		11,197,795,000
Consumer lending | Real estate loan | Criticized (accrual) | Single-family residential
Financing Receivable, Vintage Year/Credit Quality Indicator [Line Items]
Current Fiscal Year	844,000		844,000		0
One Year before Current Fiscal Year	1,983,000		1,983,000		1,275,000
Two Years before Current Fiscal Year	844,000		844,000		785,000
Three Years before Current Fiscal Year	1,499,000		1,499,000		1,463,000
Four Years before Current Fiscal Year	964,000		964,000		4,352,000
Prior	9,060,000		9,060,000		3,935,000
Revolving Loans	0		0		0
Revolving Loans Converted to Term Loans	0		0		0
Total	15,194,000		15,194,000		11,810,000
Consumer lending | Real estate loan | Criticized (nonaccrual) | Single-family residential
Financing Receivable, Vintage Year/Credit Quality Indicator [Line Items]
Current Fiscal Year	1,916,000		1,916,000		141,000
One Year before Current Fiscal Year	2,866,000		2,866,000		0
Two Years before Current Fiscal Year	4,702,000		4,702,000		204,000
Three Years before Current Fiscal Year	2,696,000		2,696,000		3,202,000
Four Years before Current Fiscal Year	2,868,000		2,868,000		1,721,000
Prior	9,098,000		9,098,000		8,154,000
Revolving Loans	0		0		0
Revolving Loans Converted to Term Loans	0		0		0
Total	24,146,000		24,146,000		13,422,000
Consumer lending | HELOCs
Financing Receivable, Vintage Year/Credit Quality Indicator [Line Items]
Current Fiscal Year	923,000		923,000		520,000
One Year before Current Fiscal Year	2,746,000		2,746,000		3,589,000
Two Years before Current Fiscal Year	5,798,000		5,798,000		7,819,000
Three Years before Current Fiscal Year	5,677,000		5,677,000		3,434,000
Four Years before Current Fiscal Year	2,384,000		2,384,000		1,542,000
Prior	20,866,000		20,866,000		13,804,000
Revolving Loans	1,615,109,000		1,615,109,000		1,959,697,000
Revolving Loans Converted to Term Loans	123,162,000		123,162,000		132,250,000
Total	1,776,665,000		1,776,665,000		2,122,655,000
Consumer lending | HELOCs | Pass
Financing Receivable, Vintage Year/Credit Quality Indicator [Line Items]
Current Fiscal Year	182,000		182,000		520,000
One Year before Current Fiscal Year	1,828,000		1,828,000		3,583,000
Two Years before Current Fiscal Year	5,736,000		5,736,000		7,336,000
Three Years before Current Fiscal Year	4,318,000		4,318,000		3,203,000
Four Years before Current Fiscal Year	1,963,000		1,963,000		525,000
Prior	13,821,000		13,821,000		8,960,000
Revolving Loans	1,611,319,000		1,611,319,000		1,958,692,000
Revolving Loans Converted to Term Loans	118,088,000		118,088,000		127,401,000
Total	1,757,255,000		1,757,255,000		2,110,220,000
Consumer lending | HELOCs | Criticized (accrual)
Financing Receivable, Vintage Year/Credit Quality Indicator [Line Items]
Current Fiscal Year	741,000		741,000		0
One Year before Current Fiscal Year	401,000		401,000		6,000
Two Years before Current Fiscal Year	62,000		62,000		0
Three Years before Current Fiscal Year	0		0		0
Four Years before Current Fiscal Year	353,000		353,000		0
Prior	1,649,000		1,649,000		0
Revolving Loans	2,039,000		2,039,000		4,000
Revolving Loans Converted to Term Loans	963,000		963,000		1,079,000
Total	6,208,000		6,208,000		1,089,000
Consumer lending | HELOCs | Criticized (nonaccrual)
Financing Receivable, Vintage Year/Credit Quality Indicator [Line Items]
Current Fiscal Year	0		0		0
One Year before Current Fiscal Year	517,000		517,000		0
Two Years before Current Fiscal Year	0		0		483,000
Three Years before Current Fiscal Year	1,359,000		1,359,000		231,000
Four Years before Current Fiscal Year	68,000		68,000		1,017,000
Prior	5,396,000		5,396,000		4,844,000
Revolving Loans	1,751,000		1,751,000		1,001,000
Revolving Loans Converted to Term Loans	4,111,000		4,111,000		3,770,000
Total	13,202,000		13,202,000		11,346,000
Consumer lending | HELOCs | YTD gross write-offs
Financing Receivable, Vintage Year/Credit Quality Indicator [Line Items]
YTD gross write-offs Current Fiscal Year			0
YTD gross write-offs One Year before Current Fiscal Year			0
YTD gross write-offs Two Years before Current Fiscal Year			0
YTD gross write-offs Three Years before Current Fiscal Year			0
YTD gross write-offs Four Years before Current Fiscal Year			0
YTD gross write-offs Prior			41,000
YTD gross write-offs Revolving Loans			0
YTD gross write-offs Revolving Loans Converted to Term Loans			6,000
YTD gross write-offs Total			47,000
Consumer lending | Total residential mortgage
Financing Receivable, Vintage Year/Credit Quality Indicator [Line Items]
Current Fiscal Year	2,404,131,000		2,404,131,000		3,549,555,000
One Year before Current Fiscal Year	3,398,303,000		3,398,303,000		2,458,581,000
Two Years before Current Fiscal Year	2,332,553,000		2,332,553,000		1,784,504,000
Three Years before Current Fiscal Year	1,643,188,000		1,643,188,000		1,110,064,000
Four Years before Current Fiscal Year	1,017,075,000		1,017,075,000		824,779,000
Prior	2,079,702,000		2,079,702,000		1,526,252,000
Revolving Loans	1,615,109,000		1,615,109,000		1,959,697,000
Revolving Loans Converted to Term Loans	123,162,000		123,162,000		132,250,000
Total	14,613,223,000		14,613,223,000		13,345,682,000
Consumer lending | Total residential mortgage | YTD gross write-offs
Financing Receivable, Vintage Year/Credit Quality Indicator [Line Items]
YTD gross write-offs Current Fiscal Year			0
YTD gross write-offs One Year before Current Fiscal Year			0
YTD gross write-offs Two Years before Current Fiscal Year			0
YTD gross write-offs Three Years before Current Fiscal Year			0
YTD gross write-offs Four Years before Current Fiscal Year			0
YTD gross write-offs Prior			41,000
YTD gross write-offs Revolving Loans			0
YTD gross write-offs Revolving Loans Converted to Term Loans			6,000
YTD gross write-offs Total			47,000
Consumer lending | Other consumer
Financing Receivable, Vintage Year/Credit Quality Indicator [Line Items]
Current Fiscal Year	3,559,000		3,559,000		17,091,000
One Year before Current Fiscal Year	18,138,000		18,138,000		137,000
Two Years before Current Fiscal Year	135,000		135,000		5,356,000
Three Years before Current Fiscal Year	0		0		0
Four Years before Current Fiscal Year	0		0		0
Prior	12,315,000		12,315,000		15,808,000
Revolving Loans	30,107,000		30,107,000		37,903,000
Revolving Loans Converted to Term Loans	0		0		0
Total	64,254,000		64,254,000		76,295,000
Consumer lending | Other consumer | Pass
Financing Receivable, Vintage Year/Credit Quality Indicator [Line Items]
Current Fiscal Year	3,555,000		3,555,000		17,088,000
One Year before Current Fiscal Year	18,138,000		18,138,000		137,000
Two Years before Current Fiscal Year	135,000		135,000		5,356,000
Three Years before Current Fiscal Year	0		0		0
Four Years before Current Fiscal Year	0		0		0
Prior	12,315,000		12,315,000		15,808,000
Revolving Loans	29,971,000		29,971,000		37,804,000
Revolving Loans Converted to Term Loans	0		0		0
Total	64,114,000		64,114,000		76,193,000
Consumer lending | Other consumer | Criticized (accrual)
Financing Receivable, Vintage Year/Credit Quality Indicator [Line Items]
Current Fiscal Year	4,000		4,000		3,000
One Year before Current Fiscal Year	0		0		0
Two Years before Current Fiscal Year	0		0		0
Three Years before Current Fiscal Year	0		0		0
Four Years before Current Fiscal Year	0		0		0
Prior	0		0		0
Revolving Loans	0		0		0
Revolving Loans Converted to Term Loans	0		0		0
Total	4,000		4,000		3,000
Consumer lending | Other consumer | Criticized (nonaccrual)
Financing Receivable, Vintage Year/Credit Quality Indicator [Line Items]
Current Fiscal Year	0		0		0
One Year before Current Fiscal Year	0		0		0
Two Years before Current Fiscal Year	0		0		0
Three Years before Current Fiscal Year	0		0		0
Four Years before Current Fiscal Year	0		0		0
Prior	0		0		0
Revolving Loans	136,000		136,000		99,000
Revolving Loans Converted to Term Loans	0		0		0
Total	$ 136,000		$ 136,000		$ 99,000