Note 8 - Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2022

Notes Tables

Fair Value, by Balance Sheet Grouping [Table Text Block]

	June 30, 2022
(In thousands)	Balance		Level 1		Level 2		Level 3
Assets
Cash and cash equivalents	$	250,195	$	250,195	$	—	$	—
Restricted cash		13,824		13,824		—		—
Investment available for sale		14,116		—		—		14,116

	December 31, 2021
(In thousands)	Balance		Level 1		Level 2		Level 3
Assets
Cash and cash equivalents	$	344,557	$	344,557	$	—	$	—
Restricted cash		12,571		12,571		—		—
Investment available for sale		15,822		—		—		15,822
Liability
Contingent payments	$	62	$	—	$	—	$	62

Fair Value Asset (Liability) Measured On Recurring Basis Unobservable Input Reconciliation [Table Text Block]

	Three Months Ended
	June 30, 2022					June 30, 2021
	Asset			Liability		Asset			Liability
	Investment					Investment
	Available			Contingent		Available			Contingent
(In thousands)	for Sale			Payments		for Sale			Payments
Balance at beginning of reporting period	$	15,612		$	—	$	16,297		$	(769	)
Total gains (losses) (realized or unrealized):
Included in interest income (expense)		42			—		41			(8	)
Included in other comprehensive income (loss)		(903	)		—		(52	)		—
Included in other items, net		—			—		—			(23	)
Purchases, sales, issuances and settlements:
Settlements		(635	)		—		(590	)		311
Balance at end of reporting period	$	14,116		$	—	$	15,696		$	(489	)

	Six Months Ended
	June 30, 2022						June 30, 2021
	Asset			Liability			Asset			Liability
	Investment						Investment
	Available			Contingent			Available			Contingent
(In thousands)	for Sale			Payments			for Sale			Payments
Balance at beginning of reporting period	$	15,822		$	(62	)	$	16,692		$	(924	)
Total gains (losses) (realized or unrealized):
Included in interest income (expense)		84			—			82			(21	)
Included in other comprehensive income (loss)		(1,155	)		—			(488	)		—
Included in other items, net		—			—			—			3
Purchases, sales, issuances and settlements:
Settlements		(635	)		62			(590	)		453
Balance at end of reporting period	$	14,116		$	—		$	15,696		$	(489	)

Fair Value, Liabilities Measured on Recurring and Nonrecurring Basis [Table Text Block]

	June 30, 2022
	Outstanding		Carrying		Estimated		Fair Value
(In thousands)	Face Amount		Value		Fair Value		Hierarchy
Liabilities
Obligation under assessment arrangements	$	23,311	$	20,032	$	26,748	Level 3

	December 31, 2021
	Outstanding		Carrying		Estimated		Fair Value
(In thousands)	Face Amount		Value		Fair Value		Hierarchy
Liabilities
Obligation under assessment arrangements	$	24,306	$	20,734	$	26,908	Level 3

Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block]

	June 30, 2022
	Outstanding		Carrying		Estimated		Fair Value
(In thousands)	Face Amount		Value		Fair Value		Hierarchy
Credit facility	$	1,049,000	$	1,030,966	$	1,045,741	Level 2
4.750% senior notes due 2027		1,000,000		989,286		905,000	Level 1
4.750% senior notes due 2031		900,000		887,867		756,000	Level 1
Other		745		745		745	Level 3
Total debt	$	2,949,745	$	2,908,864	$	2,707,486

	December 31, 2021
	Outstanding		Carrying		Estimated		Fair Value
(In thousands)	Face Amount		Value		Fair Value		Hierarchy
Credit facility	$	867,897	$	859,106	$	866,812	Level 2
4.750% senior notes due 2027		1,000,000		988,312		1,023,750	Level 1
8.625% senior notes due 2025		300,000		295,934		320,250	Level 1
4.750% senior notes due 2031		900,000		886,746		915,750	Level 1
Other		1,496		1,496		1,496	Level 3
Total debt	$	3,069,393	$	3,031,594	$	3,128,058