Securities Available for Sale and Held to Maturity - Securities with Gross Unrealized Losses, Segregated by Length of Impairment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Schedule of Available For Sale and Held to Maturity Securities [Line Items]
Estimated Fair Value, Less than 12 Months	$ 101,060	$ 1,324,604
Gross Unrealized (Losses), Less than 12 Months	(266)	(18,989)
Estimated Fair Value, 12 Months or More	1,104,931	1,148,537
Gross Unrealized (Losses), 12 Months or More	(43,498)	(87,378)
Estimated Fair Value, Total	1,205,991	2,473,141
Gross Unrealized (Losses), Total	(43,764)	(106,367)
US Treasury Securities [Member]
Schedule of Available For Sale and Held to Maturity Securities [Line Items]
Estimated Fair Value, Less than 12 Months		123,277
Gross Unrealized (Losses), Less than 12 Months		(1,925)
Estimated Fair Value, 12 Months or More		0
Gross Unrealized (Losses), 12 Months or More		0
Estimated Fair Value, Total		123,277
Gross Unrealized (Losses), Total		(1,925)
U.S. Government Agency Obligations [Member]
Schedule of Available For Sale and Held to Maturity Securities [Line Items]
Estimated Fair Value, Less than 12 Months	3,905	38,807
Gross Unrealized (Losses), Less than 12 Months	(14)	(2,387)
Estimated Fair Value, 12 Months or More	40,952	0
Gross Unrealized (Losses), 12 Months or More	(670)	0
Estimated Fair Value, Total	44,857	38,807
Gross Unrealized (Losses), Total	(684)	(2,387)
Residential Mortgage Pass-Through Securities Guaranteed by GNMA [Member]
Schedule of Available For Sale and Held to Maturity Securities [Line Items]
Estimated Fair Value, Less than 12 Months	5,925	15,802
Gross Unrealized (Losses), Less than 12 Months	(18)	(293)
Estimated Fair Value, 12 Months or More	26,946	27,803
Gross Unrealized (Losses), 12 Months or More	(2,371)	(3,508)
Estimated Fair Value, Total	32,871	43,605
Gross Unrealized (Losses), Total	(2,389)	(3,801)
Residential Mortgage Pass-Through Securities Issued by FNMA and FHLMC [Member]
Schedule of Available For Sale and Held to Maturity Securities [Line Items]
Estimated Fair Value, Less than 12 Months	91,230	981,747
Gross Unrealized (Losses), Less than 12 Months	(234)	(13,848)
Estimated Fair Value, 12 Months or More	205,163	237,487
Gross Unrealized (Losses), 12 Months or More	(18,947)	(32,199)
Estimated Fair Value, Total	296,393	1,219,234
Gross Unrealized (Losses), Total	(19,181)	(46,047)
Other Residential Mortgage-Backed Securities Issued or Guaranteed by FNMA, FHLMC or GNMA [Member]
Schedule of Available For Sale and Held to Maturity Securities [Line Items]
Estimated Fair Value, Less than 12 Months	0	0
Gross Unrealized (Losses), Less than 12 Months	0	0
Estimated Fair Value, 12 Months or More	92,434	115,681
Gross Unrealized (Losses), 12 Months or More	(4,233)	(8,004)
Estimated Fair Value, Total	92,434	115,681
Gross Unrealized (Losses), Total	(4,233)	(8,004)
Commercial Mortgage-Backed Securities Issued or Guaranteed by FNMA, FHLMC or GNMA [Member]
Schedule of Available For Sale and Held to Maturity Securities [Line Items]
Estimated Fair Value, Less than 12 Months	0	164,971
Gross Unrealized (Losses), Less than 12 Months	0	(536)
Estimated Fair Value, 12 Months or More	739,436	767,566
Gross Unrealized (Losses), 12 Months or More	(17,277)	(43,667)
Estimated Fair Value, Total	739,436	932,537
Gross Unrealized (Losses), Total	$ (17,277)	$ (44,203)