Investment Securities, Pledged Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Pledged Securities [Abstract]
Carrying amount of securities	$ 932,058	$ 997,817
Asset Pledged as Collateral [Member] \| Public Deposits, Federal Home Loan Bank ("FHLB") and Federal Reserve Bank ("FRB") Borrowings, and Other Government Agency Deposits [Member]
Pledged Securities [Abstract]
Carrying amount of securities	$ 757,200	$ 478,700

Sum of the carrying amounts as of the balance sheet date of all investments.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(1)(h))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1

Name:	us-gaap_Investments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant