Note 8 - Debt, Credit Facility and Leases - Debt Summary (Details) - Senior Notes [Member] $ in Thousands, $ in Millions	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Jul. 09, 2020 CAD ($)
Debt Instrument [Line Items]
Principal	$ 510,614	$ 513,051
Unamortized discount/premium and issuance costs	(4,248)	(4,956)
Long-term debt balance	506,366	508,095
The 2028 Senior Notes [Member]
Debt Instrument [Line Items]
Principal	475,000	475,000
Unamortized discount/premium and issuance costs	(4,640)	(5,552)
Long-term debt balance	470,360	469,448
IQ Notes [Member]
Debt Instrument [Line Items]
Principal	35,614	38,051
Unamortized discount/premium and issuance costs	392	596
Long-term debt balance	$ 36,006	$ 38,647	$ 48.2

Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant