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Note 14 - Common Shares - Share Repurchases (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Stock Repurchased and Retired During Period, Shares (in shares)	0	0	70,238
Stock Repurchased and Retired During Period, Value	$ 0	$ 0	$ 3,281
Average price per share (in dollars per share)	$ 0	$ 0	$ 46.70
Number of shares (in shares)	3,053	45,824	48,013
Aggregate market value of shares (in thousands)	$ 197	$ 3,669	$ 2,957
Average price per share (in dollars per share)	$ 64.67	$ 80.07	$ 61.58

X

- Definition

The aggregate market value of shares that received in connection with share-based compensation.

+ References

No definition available.

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X

- Definition

Per share price of shares that received in connection with share-based compensation.

+ References

No definition available.

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X

- Definition

Per share or per unit amount of shares that have been repurchased and retired during the period.

+ References

No definition available.

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X

- Definition

Number of shares used to settle grantee's tax withholding obligation for award under share-based payment arrangement.

+ References

No definition available.

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- Definition

Number of shares that have been repurchased and retired during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-SubTopic 10
-Topic 505
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-2

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition

Equity impact of the value of stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-SubTopic 10
-Topic 505
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-2

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

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