Loans Receivable, Net - Credit Quality Indicators for Commercial Loans (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Credit Quality Indicators By Origination
Gross Charge-Offs	$ 4,135	$ 3,790	$ 8,430	$ 7,083
Total	16,851,991		16,851,991		$ 16,198,082
Commercial real estate
Credit Quality Indicators By Origination
Gross Charge-Offs, originated current fiscal year			0		889
Gross Charge-Offs, originated fiscal year before current fiscal year			0		430
Gross Charge-Offs, originated two years before current fiscal year			72		145
Gross Charge-Offs, originated three years before current fiscal year			0		0
Gross Charge-Offs, originated four years before current fiscal year			5		0
Gross Charge-Offs, Prior			318		616
Gross Charge-Offs, Revolving loans			0		0
Gross Charge-Offs	395	69	395	416	2,080
Term loans originated current fiscal year	667,673		667,673		1,316,100
Term loans originated fiscal year before current fiscal year	1,336,519		1,336,519		2,547,939
Term loans originated two years before current fiscal year	2,522,314		2,522,314		2,200,677
Term loans originated three years before current fiscal year	2,153,164		2,153,164		1,130,117
Term loans originated four years before current fiscal year	1,096,214		1,096,214		691,810
Term loans originated five years before current fiscal year	2,645,736		2,645,736		2,129,808
Revolving loans	292,344		292,344		286,855
Total	10,713,964		10,713,964		10,303,306
Commercial real estate | Pass
Credit Quality Indicators By Origination
Term loans originated current fiscal year	639,113		639,113		1,313,446
Term loans originated fiscal year before current fiscal year	1,332,961		1,332,961		2,520,484
Term loans originated two years before current fiscal year	2,469,577		2,469,577		2,178,153
Term loans originated three years before current fiscal year	2,119,716		2,119,716		1,124,525
Term loans originated four years before current fiscal year	1,089,230		1,089,230		656,203
Term loans originated five years before current fiscal year	2,579,745		2,579,745		2,053,011
Revolving loans	287,423		287,423		285,432
Total	10,517,765		10,517,765		10,131,254
Commercial real estate | Special Mention
Credit Quality Indicators By Origination
Term loans originated current fiscal year	557		557		97
Term loans originated fiscal year before current fiscal year	3,161		3,161		12,855
Term loans originated two years before current fiscal year	38,297		38,297		19,782
Term loans originated three years before current fiscal year	20,489		20,489		0
Term loans originated four years before current fiscal year	1,739		1,739		1,104
Term loans originated five years before current fiscal year	18,603		18,603		18,818
Revolving loans	3,347		3,347		1
Total	86,193		86,193		52,657
Commercial real estate | Substandard
Credit Quality Indicators By Origination
Term loans originated current fiscal year	28,003		28,003		2,557
Term loans originated fiscal year before current fiscal year	397		397		14,600
Term loans originated two years before current fiscal year	14,440		14,440		2,742
Term loans originated three years before current fiscal year	12,959		12,959		5,592
Term loans originated four years before current fiscal year	5,245		5,245		34,503
Term loans originated five years before current fiscal year	47,366		47,366		57,948
Revolving loans	1,573		1,573		1,421
Total	109,983		109,983		119,363
Commercial real estate | Doubtful/ Loss
Credit Quality Indicators By Origination
Term loans originated current fiscal year	0		0		0
Term loans originated fiscal year before current fiscal year	0		0		0
Term loans originated two years before current fiscal year	0		0		0
Term loans originated three years before current fiscal year	0		0		0
Term loans originated four years before current fiscal year	0		0		0
Term loans originated five years before current fiscal year	22		22		31
Revolving loans	1		1		1
Total	23		23		32
Other commercial
Credit Quality Indicators By Origination
Gross Charge-Offs, originated current fiscal year			2,536		3,080
Gross Charge-Offs, originated fiscal year before current fiscal year			50		406
Gross Charge-Offs, originated two years before current fiscal year			48		0
Gross Charge-Offs, originated three years before current fiscal year			405		92
Gross Charge-Offs, originated four years before current fiscal year			130		0
Gross Charge-Offs, Prior			224		313
Gross Charge-Offs, Revolving loans			0		0
Gross Charge-Offs	1,461	$ 1,469	3,393	$ 2,241	3,891
Term loans originated current fiscal year	194,955		194,955		369,059
Term loans originated fiscal year before current fiscal year	359,137		359,137		566,295
Term loans originated two years before current fiscal year	547,892		547,892		531,558
Term loans originated three years before current fiscal year	492,394		492,394		245,962
Term loans originated four years before current fiscal year	225,163		225,163		145,828
Term loans originated five years before current fiscal year	539,104		539,104		448,619
Revolving loans	707,383		707,383		594,542
Total	3,066,028		3,066,028		2,901,863
Other commercial | Pass
Credit Quality Indicators By Origination
Term loans originated current fiscal year	194,258		194,258		367,337
Term loans originated fiscal year before current fiscal year	356,837		356,837		561,567
Term loans originated two years before current fiscal year	540,268		540,268		519,151
Term loans originated three years before current fiscal year	473,380		473,380		240,613
Term loans originated four years before current fiscal year	218,385		218,385		141,336
Term loans originated five years before current fiscal year	513,648		513,648		443,400
Revolving loans	688,514		688,514		577,953
Total	2,985,290		2,985,290		2,851,357
Other commercial | Special Mention
Credit Quality Indicators By Origination
Term loans originated current fiscal year	550		550		0
Term loans originated fiscal year before current fiscal year	729		729		3,319
Term loans originated two years before current fiscal year	1,537		1,537		10,187
Term loans originated three years before current fiscal year	10,118		10,118		0
Term loans originated four years before current fiscal year	1,958		1,958		0
Term loans originated five years before current fiscal year	0		0		0
Revolving loans	4,977		4,977		11,977
Total	19,869		19,869		25,483
Other commercial | Substandard
Credit Quality Indicators By Origination
Term loans originated current fiscal year	8		8		1,603
Term loans originated fiscal year before current fiscal year	1,571		1,571		1,408
Term loans originated two years before current fiscal year	6,039		6,039		2,218
Term loans originated three years before current fiscal year	8,893		8,893		5,347
Term loans originated four years before current fiscal year	4,818		4,818		4,490
Term loans originated five years before current fiscal year	25,456		25,456		5,219
Revolving loans	13,847		13,847		4,612
Total	60,632		60,632		24,897
Other commercial | Doubtful/ Loss
Credit Quality Indicators By Origination
Term loans originated current fiscal year	139		139		119
Term loans originated fiscal year before current fiscal year	0		0		1
Term loans originated two years before current fiscal year	48		48		2
Term loans originated three years before current fiscal year	3		3		2
Term loans originated four years before current fiscal year	2		2		2
Term loans originated five years before current fiscal year	0		0		0
Revolving loans	45		45		0
Total	$ 237		$ 237		$ 126