Convertible Notes (Tables)

9 Months Ended

Sep. 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)	September 30, 2017			December 31, 2016
Principal amount of the December 2021 Notes	$	150,000		$	150,000
Unamortized discount of liability component	(34,284		)	(39,152		)
Net carrying value of the December 2021 Notes	$	115,716		$	110,848

Schedule of convertible and non-recourse notes activity

		Principal Balance Outstanding		Carrying Value
		September 30,		September 30,		December 31,
Description	Maturity Date	2017		2017		2016
(In thousands)
Convertible Notes
February 2018 Notes	February 1, 2018	$	126,447	$	124,922	$	121,595
December 2021 Notes	December 1, 2021	$	150,000	115,716		110,848
Total				$	240,638	$	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)	September 30, 2017			December 31, 2016
Principal amount of the February 2018 Notes	$	126,447		$	126,447
Unamortized discount of liability component	(1,525		)	(4,852		)
Net carrying value of the February 2018 Notes	$	124,922		$	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				Nine Months Ended
	September 30,				September 30,
(In thousands)	2017		2016		2017		2016
Contractual coupon interest	$	1,264	$	2,465	$	3,793	$	7,393
Amortization of debt issuance costs	259		457		758		1,337
Amortization of debt discount	870		1,591		2,569		4,696
Total	$	2,393	$	4,513	$	7,120	$	13,426

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				Nine Months Ended
	September 30,				September 30,
(In thousands)	2017		2016		2017		2016
Contractual coupon interest	$	1,031	$	—	$	3,094	$	—
Amortization of debt issuance costs	18		—		54		—
Amortization of debt discount	132		—		393		—
Amortization of conversion feature	1,522		—		4,421		—
Total	$	2,703	$	—	$	7,962	$	—