Note G - Dividend Payment (Details Textual) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended
Apr. 13, 2026	Jan. 12, 2026	Mar. 31, 2026	Mar. 31, 2025
Common Stock, Dividends, Per Share, Cash Paid	$ 0.1525	$ 0.15
Dividends, Common Stock, Cash	$ 2,100	$ 2,100	$ 2,054	$ 2,061

Aggregate dividends paid during the period for each share of common stock outstanding.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480008/505-10-S99-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480070/505-10-S50-1

Name:	us-gaap_CommonStockDividendsPerShareCashPaid
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration