Derivatives - Offsetting of Derivatives (Details) - USD ($)	Dec. 31, 2023	Dec. 31, 2022
Assets
Derivative assets - Fair value	$ 610,920,000	$ 755,328,000
Less: Master Netting Arrangements	(75,534,000)	(242,745,000)
Less: Cash collateral received or paid	(237,258,000)	(372,038,000)
Net derivative assets	298,128,000	140,545,000
Less: Security Collateral Received	(246,259,000)	(60,567,000)
Net derivative assets	51,869,000	79,978,000
Contracts not subject to master netting arrangements, gross amounts recognized	3,000,000	2,000,000
Derivative, cash collateral received, including amount offset by fair value assets, and excess cash amount	(244,000,000)	(385,000,000)
Liabilities
Derivative liabilities - Fair Value	613,314,000	887,264,000
Less: Master Netting Arrangements	(75,534,000)	(242,745,000)
Less: Cash collateral received/paid	(636,000)	0
Net derivative liabilities	537,144,000	644,519,000
Less: Security Collateral Pledged	0	(38,438,000)
Net derivative liabilities	537,144,000	606,081,000
Contracts not subject to master netting arrangements, gross amounts recognized	16,000,000	1,000,000
Derivative, cash collateral posted against derivative liabilities, including amount offset the derivative fair value liabilities, and excess cash amount	$ 1,000,000	$ 490,000
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Other assets	Other assets
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Accrued expenses and other liabilities	Accrued expenses and other liabilities