Securities (Proceeds from Gross Gains on and Gross Losses on Sale of Securities) (Details) - USD ($) $ in Thousands	9 Months Ended
Sep. 30, 2021	Sep. 30, 2020
Investments Debt And Equity Securities [Abstract]
Proceeds	$ 198,681	$ 211,919
Gross gains	1,649	1,984
Gross losses	1,316	1,496
Net gain	$ 333	$ 488

This item represents the difference between the gross realized gains and losses realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities. Additionally, this item would include any losses recognized for other than temporary impairments (OTTI) of the subject investments in debt and equity securities.

No definition available.

Name:	us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration