COMPONENTS OF THE COMPANY'S CONDENSED CONSOLIDATED BALANCE SHEETS Intangible Assets (Details) - USD ($) $ in Thousands		Jun. 30, 2017	Dec. 31, 2016
Schedule of Intangible Assets [Table] [Line Items]
Intangible Assets, Gross		$ 59,911	$ 59,911
Finite-Lived Intangible Assets, Accumulated Amortization		(31,587)	(28,409)
Total intangible assets		28,324	31,502
Finite-Lived Intangible Assets, Net	[1]	22,373
Developed technology
Schedule of Intangible Assets [Table] [Line Items]
Finite-Lived Intangible Assets, Gross		33,270	33,270
Finite-Lived Intangible Assets, Accumulated Amortization		(17,333)	(15,455)
Finite-Lived Intangible Assets, Net		15,937	17,815
Customer relationships
Schedule of Intangible Assets [Table] [Line Items]
Finite-Lived Intangible Assets, Gross		20,030	20,030
Finite-Lived Intangible Assets, Accumulated Amortization		(13,594)	(12,474)
Finite-Lived Intangible Assets, Net		6,436	7,556
In-place leases
Schedule of Intangible Assets [Table] [Line Items]
Finite-Lived Intangible Assets, Gross		660	660
Finite-Lived Intangible Assets, Accumulated Amortization		(660)	(480)
Finite-Lived Intangible Assets, Net		0	180
Domain name
Schedule of Intangible Assets [Table] [Line Items]
Indefinite-Lived Intangible Assets		1,261	1,261
In-process research and development
Schedule of Intangible Assets [Table] [Line Items]
Indefinite-Lived Intangible Assets		$ 4,690	$ 4,690

[1] The total above excludes $4.7 million of in-process research and development that will be amortized, upon completion of development, over the estimated useful life of the technology.