Securities Sold Under Agreements to Repurchase - Schedule of Remaining Contractual Maturity of Secured Borrowings and Class of Collateral Pledged Under Repurchase Agreements (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021
Assets Sold under Agreements to Repurchase [Line Items]
Secured borrowings and class of collateral pledged under repurchase agreements	$ 509,275	$ 392,275	$ 395,242
U.S. Treasury and agency securities
Assets Sold under Agreements to Repurchase [Line Items]
Secured borrowings and class of collateral pledged under repurchase agreements	509,275
Overnight and Continuous
Assets Sold under Agreements to Repurchase [Line Items]
Secured borrowings and class of collateral pledged under repurchase agreements	508,623
Overnight and Continuous | U.S. Treasury and agency securities
Assets Sold under Agreements to Repurchase [Line Items]
Secured borrowings and class of collateral pledged under repurchase agreements	508,623
Up to 30 Days
Assets Sold under Agreements to Repurchase [Line Items]
Secured borrowings and class of collateral pledged under repurchase agreements	238
Up to 30 Days | U.S. Treasury and agency securities
Assets Sold under Agreements to Repurchase [Line Items]
Secured borrowings and class of collateral pledged under repurchase agreements	238
30-90 Days
Assets Sold under Agreements to Repurchase [Line Items]
Secured borrowings and class of collateral pledged under repurchase agreements	233
30-90 Days | U.S. Treasury and agency securities
Assets Sold under Agreements to Repurchase [Line Items]
Secured borrowings and class of collateral pledged under repurchase agreements	233
Greater Than 90 days
Assets Sold under Agreements to Repurchase [Line Items]
Secured borrowings and class of collateral pledged under repurchase agreements	181
Greater Than 90 days | U.S. Treasury and agency securities
Assets Sold under Agreements to Repurchase [Line Items]
Secured borrowings and class of collateral pledged under repurchase agreements	$ 181