Note 12 - Long-Term Debt Level 3 (Tables)

12 Months Ended

Dec. 31, 2017

Long-term Debt, Unclassified [Abstract]

Schedule of Long-term Debt Instruments [Table Text Block]

The carrying value of our long-term debt at December 31, 2017 and 2016 was as follows:

		December 31,
($ in thousands)		2017		2016
5.500%	Senior Notes due 2019	$	157,636	$	296,907
5.250%	Senior Notes due 2020	231,834		345,308
7.000%	Senior Notes due 2021	195,146		344,362
4.500%	Senior Notes due 2024	442,458		—
3.000%	Convertible Senior Notes due 2017	—		20,947
2.250%	Convertible Senior Notes due 2019	—		62,013
	Total long-term debt	$	1,027,074	$	1,069,537

Convertible Debt [Table Text Block]

The convertible notes are reflected on our consolidated balance sheets as follows:

	Convertible Senior Notes due 2017					Convertible Senior Notes due 2019
	December 31,					December 31,
(In thousands)	2017		2016			2017		2016
Liability component:
Principal	$	—	$	22,233		$	—	$	68,024
Debt discount, net (1)	—		(1,221		)	—		(5,461		)
Debt issuance costs (1)	—		(65		)	—		(550		)
Net carrying amount	$	—	$	20,947		$	—	$	62,013

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(1) Included within long-term debt and is being amortized over the life of the convertible notes.

Schedule of Interest Expense Recognized Related to Convertible Debt [Table Text Block]

The following table sets forth total interest expense recognized related to the convertible notes for the periods indicated:

	Convertible Senior Notes due 2017				Convertible Senior Notes due 2019
	December 31,				December 31,
	2017		2016		2017			2016
(In thousands)
Contractual interest expense (1)	$	310	$	872	$	(510	)	$	3,426
Amortization of debt discount	619		1,674		163			5,016
Amortization of debt issuance costs	33		88		16			505
Total interest expense (1)	$	962	$	2,634	$	(331	)	$	8,947