Convertible Notes (Tables)

6 Months Ended

Jun. 30, 2014

Debt Disclosure [Abstract]

Schedule of convertible and non-recourse notes activity

		Principal Balance Outstanding		Carrying Value
		June 30,		June 30,		December 31,
Description	Maturity Date	2014		2014		2013
(In thousands)
Convertible Notes
Series 2012 Notes	February 15, 2015	$	48,311	$	47,160	$	172,630
May 2015 Notes	May 1, 2015	$	155,250	150,797		148,253
February 2018 Notes	February 1, 2018	$	300,000	272,824		—
Term loan	October 28, 2014	$	37,500	37,364		74,397
Total				$	508,145	$	395,280

Schedule of carrying value and unamortized discount on Series 2012 Notes

(In thousands)	June 30, 2014			December 31, 2013
Principal amount of the Series 2012 Notes	$	48,311		$	180,000
Unamortized discount of liability component	(1,151		)	(7,370		)
Total	$	47,160		$	172,630

Schedule of interest expense on Series 2012 Notes

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(In thousands)	2014		2013		2014		2013
Contractual coupon interest	$	347	$	1,287	$	1,108	$	2,573
Amortization of debt issuance costs	62		287		932		571
Amortization of debt discount	399		1,513		1,379		3,000
Total	$	808	$	3,087	$	3,419	$	6,144

Schedule of carrying value and unamortized discount on May 2015 Notes

(In thousands)	June 30, 2014			December 31, 2013
Principal amount of the May 2015 Notes	$	155,250		$	155,250
Unamortized discount of liability component	(4,453		)	(6,997		)
Total	$	150,797		$	148,253

Schedule of interest expense for May 2015 Notes

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(In thousands)	2014		2013		2014		2013
Contractual coupon interest	$	1,456	$	1,455	$	2,911	$	2,911
Amortization of debt issuance costs	317		307		632		611
Amortization of debt discount	1,283		1,194		2,544		2,366
Total	$	3,056	$	2,956	$	6,087	$	5,888

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

(In thousands)	June 30, 2014
Principal amount of the February 2018 Notes	$	300,000
Unamortized discount of liability component	(27,176		)
Total	$	272,824

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

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(In thousands)	2014		2013		2014		2013
Contractual coupon interest	$	3,062	$	—	$	4,633	$	—
Amortization of debt issuance costs	600		—		822		—
Amortization of debt discount	1,879		—		2,550		—
Total	$	5,541	$	—	$	8,005	$	—