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Note 15 - Subsequent Events (Details Textual) - USD ($) $ in Thousands, shares in Millions			1 Months Ended	3 Months Ended
	May 04, 2022	Oct. 23, 2020	May 04, 2022	Mar. 31, 2022	Mar. 31, 2021
Treasury Stock, Shares, Acquired (in shares)				0.7	0.5
Treasury Stock, Value, Acquired, Cost Method				$ 14,800	$ 8,118
Subsequent Event [Member]
Treasury Stock, Shares, Acquired (in shares)			0.6
Treasury Stock, Value, Acquired, Cost Method			$ 11,900
Lenders [Member]
Line of Credit Facility, Revolver Commitment, Amount		$ 45,000		$ 45,000
Lenders [Member] | Revolving Credit Facility [Member]
Line of Credit Facility, Maximum Increase in Borrowing Capacity		$ 50,000
Lenders [Member] | Subsequent Event [Member]
Line of Credit Facility, Revolver Commitment, Amount	$ 65,000
Lenders [Member] | Subsequent Event [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Minimum [Member]
Debt Instrument, Basis Spread on Variable Rate	0.10%
Lenders [Member] | Subsequent Event [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Maximum [Member]
Debt Instrument, Basis Spread on Variable Rate	0.25%
Lenders [Member] | Subsequent Event [Member] | Revolving Credit Facility [Member]
Line of Credit Facility, Maximum Increase in Borrowing Capacity	$ 75,000		$ 75,000

X

- Definition

Line of credit facility's maximum increase in borrowing capacity as long as no event of default exists.

+ References

No definition available.

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- Definition

The revolver commitment amount.

+ References

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

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- Definition

Number of shares that have been repurchased during the period and are being held in treasury.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=126973232&loc=d3e21463-112644

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-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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- Definition

Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

+ References

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-Topic 505
-SubTopic 10
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