Note 10 - Long-Term Debt (Tables)

6 Months Ended

Jun. 30, 2015

Debt Instrument [Line Items]

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

The carrying value of our long-term debt at June 30, 2015 and December 31, 2014 was as follows:

(In thousands)		June 30, 2015		December 31, 2014
9.000%	Senior Notes due 2017	$	191,256	$	190,245
3.000%	Convertible Senior Notes due 2017	51,917		371,336
2.250%	Convertible Senior Notes due 2019	342,980		336,133
5.500%	Senior Notes due 2019	295,198		294,585
5.250%	Senior Notes due 2020	343,541		—
	Total long-term debt	$	1,224,892	$	1,192,299

Schedule of Liability and Equity Components of Convertible Debt [Table Text Block]

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

	Convertible Senior Notes due 2017						Convertible Senior Notes due 2019
(In thousands)	June 30, 2015			December 31, 2014			June 30, 2015			December 31, 2014
Liability component:
Principal	$	60,914		$	450,000		$	399,992		$	400,000
Debt discount, net (1)	(8,546		)	(74,690		)	(51,793		)	(57,989		)
Debt issuance costs (1)	(451		)	(3,974		)	(5,219		)	(5,878		)
Net carrying amount	$	51,917		$	371,336		$	342,980		$	336,133
Equity component of currently redeemable convertible senior notes	$	8,546		$	74,690		$	—		$	—

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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 tables set forth total interest expense recognized related to the convertible notes for the periods indicated:

	Convertible Senior Notes due 2017
	Three Months Ended June 30,				Six Months Ended June 30,
($ in thousands)	2015		2014		2015		2014
Contractual interest expense	$	3,122	$	3,375	$	6,497	$	6,750
Amortization of debt issuance costs	298		304		616		604
Amortization of debt discount	5,394		5,312		11,102		10,498
Total interest expense	$	8,814	$	8,991	$	18,215	$	17,852

	Convertible Senior Notes due 2019
	Three Months Ended June 30,				Six Months Ended June 30,
($ in thousands)	2015		2014		2015		2014
Contractual interest expense	$	2,250	$	2,250	$	4,500	$	4,500
Amortization of debt issuance costs	330		319		658		635
Amortization of debt discount	3,123		2,934		6,196		5,823
Total interest expense	$	5,703	$	5,503	$	11,354	$	10,958

Accounting Standards Update 2015-03 [Member]

Debt Instrument [Line Items]

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

The following illustrates the impact of the reclassification:

		December 31, 2014
(In thousands)		As Previously Reported		Adjustment			As Adjusted
9.000%	Senior Notes due 2017	$	192,605	$	(2,360	)	$	190,245
3.000%	Convertible Senior Notes due 2017	375,310		(3,974		)	371,336
2.250%	Convertible Senior Notes due 2019	342,011		(5,878		)	336,133
5.500%	Senior Notes due 2019	300,000		(5,415		)	294,585
	Total long-term debt	$	1,209,926	$	(17,627	)	$	1,192,299