Convertible Notes (Tables)

6 Months Ended

Jun. 30, 2017

Debt Disclosure [Abstract]

Schedule of carrying value and unamortized discount on December 2021 Notes [Table Text Block]

The carrying value and unamortized discount of the December 2021 Notes were as follows:

(In thousands)	June 30, 2017			December 31, 2016
Principal amount of the December 2021 Notes	$	150,000		$	150,000
Unamortized discount of liability component	(35,956		)	(39,152		)
Net carrying value of the December 2021 Notes	$	114,044		$	110,848

Schedule of convertible and non-recourse notes activity

		Principal Balance Outstanding		Carrying Value
		June 30,		June 30,		December 31,
Description	Maturity Date	2017		2017		2016
(In thousands)
Convertible Notes
February 2018 Notes	February 1, 2018	$	126,447	$	123,793	$	121,595
December 2021 Notes	December 1, 2021	$	150,000	114,044		110,848
Total				$	237,837	$	232,443

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)	June 30, 2017			December 31, 2016
Principal amount of the February 2018 Notes	$	126,447		$	126,447
Unamortized discount of liability component	(2,654		)	(4,852		)
Net carrying value of the February 2018 Notes	$	123,793		$	121,595

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

Interest expense for the February 2018 Notes on the Company’s Condensed Consolidated Statements of Income was as follows:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(In thousands)	2017		2016		2017		2016
Contractual coupon interest	$	1,264	$	2,464	$	2,529	$	4,928
Amortization of debt issuance costs	250		442		499		880
Amortization of debt discount	851		1,555		1,699		3,105
Total	$	2,365	$	4,461	$	4,727	$	8,913

Schedule of interest expense for December 2021 Notes [Table Text Block]

Interest expense for the December 2021 Notes on the Company’s Condensed Consolidated Statements of Income was as follows:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(In thousands)	2017		2016		2017		2016
Contractual coupon interest	$	1,032	$	—	$	2,063	$	—
Amortization of debt issuance costs	18		—		36		—
Amortization of debt discount	131		—		261		—
Amortization of conversion feature	1,469		—		2,899		—
Total	$	2,650	$	—	$	5,259	$	—