Securities Sold Under Agreements to Repurchase - Remaining Contractual Maturities of Repurchase Agreements by Class of Collateral Pledged (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Assets Sold Under Agreements To Repurchase [Line Items]
Securities Sold under Agreements to Repurchase	$ 450,490	$ 450,490
Debt Securities Issued by States and Political Subdivisions
Assets Sold Under Agreements To Repurchase [Line Items]
Securities Sold under Agreements to Repurchase	490	490
Residential - Government Agencies
Assets Sold Under Agreements To Repurchase [Line Items]
Securities Sold under Agreements to Repurchase	46,784	52,092
Residential - U.S. Government-Sponsored Enterprises
Assets Sold Under Agreements To Repurchase [Line Items]
Securities Sold under Agreements to Repurchase	403,216	397,908
Maturity Up To 90 Days
Assets Sold Under Agreements To Repurchase [Line Items]
Securities Sold under Agreements to Repurchase	0	0
Maturity Up To 90 Days | Debt Securities Issued by States and Political Subdivisions
Assets Sold Under Agreements To Repurchase [Line Items]
Securities Sold under Agreements to Repurchase	0	0
Maturity Up To 90 Days | Residential - Government Agencies
Assets Sold Under Agreements To Repurchase [Line Items]
Securities Sold under Agreements to Repurchase	0	0
Maturity Up To 90 Days | Residential - U.S. Government-Sponsored Enterprises
Assets Sold Under Agreements To Repurchase [Line Items]
Securities Sold under Agreements to Repurchase	0	0
Maturity 91 To 365 Days
Assets Sold Under Agreements To Repurchase [Line Items]
Securities Sold under Agreements to Repurchase	0	0
Maturity 91 To 365 Days | Debt Securities Issued by States and Political Subdivisions
Assets Sold Under Agreements To Repurchase [Line Items]
Securities Sold under Agreements to Repurchase	0	0
Maturity 91 To 365 Days | Residential - Government Agencies
Assets Sold Under Agreements To Repurchase [Line Items]
Securities Sold under Agreements to Repurchase	0	0
Maturity 91 To 365 Days | Residential - U.S. Government-Sponsored Enterprises
Assets Sold Under Agreements To Repurchase [Line Items]
Securities Sold under Agreements to Repurchase	0	0
Maturity 1 To 3 Years
Assets Sold Under Agreements To Repurchase [Line Items]
Securities Sold under Agreements to Repurchase	275,000	275,000
Maturity 1 To 3 Years | Debt Securities Issued by States and Political Subdivisions
Assets Sold Under Agreements To Repurchase [Line Items]
Securities Sold under Agreements to Repurchase	0	0
Maturity 1 To 3 Years | Residential - Government Agencies
Assets Sold Under Agreements To Repurchase [Line Items]
Securities Sold under Agreements to Repurchase	33,710	38,685
Maturity 1 To 3 Years | Residential - U.S. Government-Sponsored Enterprises
Assets Sold Under Agreements To Repurchase [Line Items]
Securities Sold under Agreements to Repurchase	241,290	236,315
Maturity After 3 Years
Assets Sold Under Agreements To Repurchase [Line Items]
Securities Sold under Agreements to Repurchase	175,490	175,490
Maturity After 3 Years | Debt Securities Issued by States and Political Subdivisions
Assets Sold Under Agreements To Repurchase [Line Items]
Securities Sold under Agreements to Repurchase	490	490
Maturity After 3 Years | Residential - Government Agencies
Assets Sold Under Agreements To Repurchase [Line Items]
Securities Sold under Agreements to Repurchase	13,074	13,407
Maturity After 3 Years | Residential - U.S. Government-Sponsored Enterprises
Assets Sold Under Agreements To Repurchase [Line Items]
Securities Sold under Agreements to Repurchase	$ 161,926	$ 161,593