Fair Value of Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2016

Fair Value Disclosures [Abstract]

Schedule of Fair Value Hierarchy of Financial Assets Carried at Fair Value

As of December 31, 2016 and 2015, the fair value hierarchy for our financial assets and financial liabilities that are carried at fair value was as follows, and unrealized gains (losses) on financial assets and liabilities presented in the table below for all periods presented were less than $1.0 million (in thousands):

	December 31, 2016								December 31, 2015
	Fair Value		Level I		Level II		Level III		Fair Value		Level I		Level II		Level III
Money market funds	$	2,226,322	$	2,226,322	$	—	$	—	$	297,810	$	297,810	$	—	$	—
U.S. treasury bills		—		—		—		—		16,664		16,664		—		—
Interest rate swaps		1,490		—		1,490		—		—		—		—		—
Total	$	2,227,812	$	2,226,322	$	1,490	$	—	$	314,474	$	314,474	$	—	$	—

Schedule of Estimated Fair Values and their Carrying Values

The following table presents their estimated fair values and their carrying values (in thousands):

	December 31, 2016				December 31, 2015
	CarryingValue		Fair Value		Carrying Value		FairValue
MyPower customer notes receivable	$	513,002	$	513,002		—		—
Convertible senior notes		2,957,288		3,205,641	$	2,505,868	$	3,423,257
Participation interest		16,713		15,025		—		—
Solar asset-backed notes		442,764		428,551		—		—
Solar loan-backed notes		137,024		132,129		—		—