Convertible Notes (Tables)

12 Months Ended

Dec. 31, 2014

Debt Disclosure [Abstract]

Schedule of convertible and non-recourse notes activity

(In thousands)	Series 2012  Notes			May 2015 Notes			February 2015  Notes			February 2018 Notes			Term Loan			Total
Balance at December 31, 2012	$	165,528		$	143,433		$	991		$	—		$	—		$	309,952
Issuance and exchange	1,000			—			(1,000		)	—			75,000			75,000
Non-cash discount	—			—			—			—			(831		)	(831		)
Discount amortization	6,102			4,820			9			—			228			11,159
Balance at December 31, 2013	172,630			148,253			—			—			74,397			395,280
Issuance and exchange	(152,784		)	(200		)	—			300,000			—			147,016
Payment	—			—			—			—			(75,000		)	(75,000		)
Non-cash discount	—			—			—			(29,726		)	—			—
Discount amortization	2,415			5,182			—			5,954			603			14,154
Balance at December 31, 2014	$	22,261		$	153,235		$	—		$	276,228		$	—		$	451,724

Schedule of carrying value and unamortized discount on Series 2012 Notes

	December 31,
(In thousands)	2014			2013
Principal amount of the Series 2012 Notes	$	22,337		$	180,000
Unamortized discount of liability component	(76		)	(7,370		)
Net carrying value of the Series 2012 Notes	$	22,261		$	172,630

Schedule of interest expense on Series 2012 Notes

	Year ended December 31,
(In thousands)	2014		2013		2012
Contractual coupon interest	$	1,726	$	5,158	$	5,122
Amortization of debt issuance costs	1,089		1,152		1,107
Amortization of debt discount	2,415		6,102		5,682
Total	$	5,230	$	12,412	$	11,911

Schedule of carrying value and unamortized discount on May 2015 Notes

	December 31,
(In thousands)	2014			2013
Principal amount of the May 2015 Notes	$	155,050		$	155,250
Unamortized discount of liability component	(1,815		)	(6,997		)
Net carrying value of the May 2015 Notes	$	153,235		$	148,253

Schedule of interest expense for May 2015 Notes

	Year Ended December 31,
(In thousands)	2014		2013		2012
Contractual coupon interest	$	5,817	$	5,822	$	5,822
Amortization of debt issuance costs	1,274		1,232		1,193
Amortization of debt discount	5,182		4,820		4,481
Total	$	12,273	$	11,874	$	11,496

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

(In thousands)	Series 2012 Notes		May 2015 Notes		February 2018 Notes		Total
2015	$	22,337	$	155,050	$	—	$	177,387
2016	—		—		—		—
2017	—		—		—		—
2018	—		—		300,000		300,000
Total	$	22,337	$	155,050	$	300,000	$	477,387

Schedule of carrying value and unamortized discount on February 2018 Notes [Table Text Block]

The carrying value and unamortized discount of the February 2018 Notes were as follows:

(In thousands)	December 31, 2014
Principal amount of the February 2018 Notes	$	300,000
Unamortized discount of liability component	(23,772		)
Net carrying value of the February 2018 Notes	$	276,228

Schedule of interest expense for February 2018 Notes [Table Text Block]

Interest expense for the February 2018 Notes on our Consolidated Statements of Income was as follows:

	Year Ended
	December 31,
(In thousands)	2014
Contractual coupon interest	$	10,633
Amortization of debt issuance costs	1,898
Amortization of debt discount	5,954
Total	$	18,485