Financial Derivatives - Schedule of Derivative Instruments in Statement of Financial Position (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2022	Dec. 31, 2021
Notional Disclosures [Abstract]
Notional Amount	$ 22,402,528	$ 22,402,528	$ 17,547,367
Asset
Financial derivatives	49,968	49,968	6,081
Gross Amounts offset in the Consolidated Balance Sheet	(11,228)	(11,228)	(1,374)
(Liability)
Derivative liability	(184,554)	(184,554)	(35,554)
Gross Amounts offset in the Consolidated Balance Sheet	11,228	11,228	1,374
Designated as hedge | Fair value hedges: | Receive fixed non-callable
Notional Disclosures [Abstract]
Notional Amount	8,984,779	8,984,779	5,884,529
Asset
Financial derivatives	125	125	974
(Liability)
Derivative liability	$ (10,282)	$ (10,282)	$ (1,475)
Weighted- Average Pay Rate	2.87%	2.87%	0.17%
Weighted- Average Receive Rate	1.56%	1.56%	0.88%
Weighted- Average Remaining Term (in years)		1 year 9 months 14 days	2 years 3 months 7 days
Designated as hedge | Fair value hedges: | Pay fixed non-callable
Notional Disclosures [Abstract]
Notional Amount	$ 7,866,679	$ 7,866,679	$ 6,238,438
Asset
Financial derivatives	29,089	29,089	205
(Liability)
Derivative liability	$ (429)	$ (429)	$ (9,525)
Weighted- Average Pay Rate	2.07%	2.07%	2.06%
Weighted- Average Receive Rate	2.85%	2.85%	0.13%
Weighted- Average Remaining Term (in years)		11 years 2 months 4 days	11 years 7 months 20 days
Designated as hedge | Fair value hedges: | Receive fixed callable
Notional Disclosures [Abstract]
Notional Amount	$ 2,491,077	$ 2,491,077	$ 1,571,577
Asset
Financial derivatives	0	0	103
(Liability)
Derivative liability	$ (184,088)	$ (184,088)	$ (17,612)
Weighted- Average Pay Rate	2.76%	2.76%	0.01%
Weighted- Average Receive Rate	1.58%	1.58%	0.80%
Weighted- Average Remaining Term (in years)		3 years 4 months 2 days	4 years 2 months 1 day
Designated as hedge | Cash flow hedges: | Pay fixed non-callable
Notional Disclosures [Abstract]
Notional Amount	$ 607,000	$ 607,000	$ 570,000
Asset
Financial derivatives	29,525	29,525	5,426
(Liability)
Derivative liability	$ (4)	$ (4)	$ (3,095)
Weighted- Average Pay Rate	1.94%	1.94%	1.93%
Weighted- Average Receive Rate	3.39%	3.39%	0.49%
Weighted- Average Remaining Term (in years)		5 years 2 months 23 days	5 years 8 months 19 days
No hedge designation
Asset
Credit valuation adjustment			$ 0
(Liability)
Credit valuation adjustment			14
No hedge designation | Receive fixed non-callable
Notional Disclosures [Abstract]
Notional Amount	$ 404,350	$ 404,350	1,377,250
Asset
Financial derivatives	0	0	115
(Liability)
Derivative liability	$ (345)	$ (345)	$ (132)
Weighted- Average Pay Rate	2.88%	2.88%	0.13%
Weighted- Average Receive Rate	0.46%	0.46%	0.43%
Weighted- Average Remaining Term (in years)		1 year 4 months 20 days	11 months 19 days
No hedge designation | Pay fixed non-callable
Notional Disclosures [Abstract]
Notional Amount	$ 197,032	$ 197,032	$ 229,062
Asset
Financial derivatives	1,611	1,611	52
(Liability)
Derivative liability	$ (44)	$ (44)	$ (4,807)
Weighted- Average Pay Rate	3.10%	3.10%	3.22%
Weighted- Average Receive Rate	2.61%	2.61%	0.16%
Weighted- Average Remaining Term (in years)		4 years 7 months 13 days	4 years 11 months 12 days
No hedge designation | Receive fixed callable
Notional Disclosures [Abstract]
Notional Amount	$ 1,818,911	$ 1,818,911
Asset
Financial derivatives	310	310
(Liability)
Derivative liability	$ (572)	$ (572)
Weighted- Average Pay Rate	3.02%	3.02%
Weighted- Average Receive Rate	3.15%	3.15%
Weighted- Average Remaining Term (in years)		2 years 7 months 17 days
No hedge designation | Basis swaps
Notional Disclosures [Abstract]
Notional Amount	$ 32,700	$ 32,700	$ 1,608,911
Asset
Financial derivatives	536	536	507
(Liability)
Derivative liability	(18)	(18)	$ (296)
Weighted- Average Pay Rate			0.17%
Weighted- Average Receive Rate			0.20%
Weighted- Average Remaining Term (in years)			3 years 3 months 21 days
No hedge designation | Treasury futures
Notional Disclosures [Abstract]
Notional Amount			$ 67,600
Asset
Financial derivatives			73
Gross Amounts offset in the Consolidated Balance Sheet	(11,228)	(11,228)	(1,374)
(Liability)
Derivative liability			0
Gross Amounts offset in the Consolidated Balance Sheet	$ 11,228	$ 11,228	$ 1,374
Weighted- Average Forward Price (in dollars per share)	$ 113.64		$ 130.58