An additional amount held in risk-based capital designed to ensure that banks build up capital buffers outside periods of stress which can be drawn down as losses are incurred. The requirement is based on simple capital conservation rules designed to avoid breaches of minimum capital requirements.

No definition available.

Note 14 - Regulatory Matters (Details Textual) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions			3 Months Ended		6 Months Ended
	Jun. 17, 2026	Mar. 18, 2026	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025	May 31, 2021	Dec. 31, 2009
Preferred Securities of Subsidiary Trust			$ 49.3		$ 49.3		$ 48.9
Maximum Restricted Core Element Allowed in Tier One Capital Percent					25.00%
Maximum Level of Consolidated Aggregate Assets Allowing for Inclusion of Trust Preferred Securities in Tier One Capital									$ 15,000.0
Trust Preferred Securities Included in Tier One Capital			$ 49.3		$ 49.3		$ 48.9
Capital Conservation Buffer			2.50%		2.50%
Common Equity Tier 1 Risk Based Capital Required For Capital Adequacy to Risk Weighted Assets			0.07		0.07
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets			0.085		0.085
Capital Required for Capital Adequacy to Risk Weighted Assets			0.105		0.105
Common Stock, Dividends, Per Share, Cash Paid (in dollars per share)			$ 0.39	$ 0.37	$ 0.78	$ 0.74
Stock Repurchase Program, Remaining Authorized Repurchase Amount			$ 6.8		$ 6.8
Stock Repurchase Program, Authorized Amount								$ 20.0
Stock Repurchased During Period, Shares (in shares)					0
O 2026 Q1 Dividends [Member]
Dividends Payable, Date Declared		Jan. 15, 2026
Common Stock, Dividends, Per Share, Cash Paid (in dollars per share)		$ 0.39
Dividends Payable, Date to be Paid		Mar. 18, 2026
Dividends Payable, Date of Record		Mar. 06, 2026
O 2026 Q2 Dividends [Member]
Dividends Payable, Date Declared	Apr. 16, 2026
Common Stock, Dividends, Per Share, Cash Paid (in dollars per share)	$ 0.39
Dividends Payable, Date to be Paid	Jun. 17, 2026
Dividends Payable, Date of Record	Jun. 05, 2026