Note 12 - Stock Repurchase Program (Details Textual) - USD ($)		1 Months Ended	3 Months Ended						9 Months Ended
	Feb. 12, 2024	Sep. 30, 2020	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023	Aug. 05, 2022
Stock Repurchase Program, Authorized Amount	$ 500,000,000										$ 500,000,000
Stock Repurchase Program, Period in Force (Year)	24 months	24 years
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 26,297,000
Treasury Stock, Value, Acquired, Cost Method			$ 102,134			$ 100,267			$ 152,743,000	$ 100,267
Treasury Stock, Common [Member]
Treasury Stock, Shares, Acquired (in shares)			690,711			875,580			1,046,351	875,580
Treasury Stock, Value, Acquired, Cost Method			$ 102,134			$ 100,267			$ 152,743,000	$ 100,267
Stock Repurchase Program [Member] | Treasury Stock, Common [Member]
Treasury Stock, Shares, Acquired (in shares)			690,711	355,640	0	875,580	0	0
Treasury Stock, Value, Acquired, Cost Method			$ 102,134	$ 50,609,000		$ 100,267