Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2015

Accounting Policies [Abstract]

Revenue From External Customers

Revenues from external customers for each group of similar products and services are as follows (in thousands):

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2015		2014		2015		2014
Operating leases	$	22,915	$	16,788	$	40,047	$	29,417
Incentives		11,543		6,199		16,719		12,011
Operating leases and incentives		34,458		22,987		56,766		41,428
Solar energy systems		7,028		5,741		12,834		8,093
Products		31,204		23,211		52,767		32,821
Solar energy systems and product sales		38,232		28,952		65,601		40,914
Total revenue	$	72,690	$	51,939	$	122,367	$	82,342