Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2015

Intangible Assets [Abstract]

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

The estimated future amortization expense of purchased intangible assets as of December 31, 2015 is as follows (in thousands):

For the Years Ending December 31,	Estimated Intangible Amortization Amount
2016	$	12,747
2017	10,713
2018	4,870
2019	790
2020	790
Thereafter	412
Total estimated future amortization expense	$	30,322

Schedule of Intangible Assets and Goodwill

The following tables summarize the Company’s total purchased intangible assets (in thousands):

	Gross		Accumulated Amortization			Net
December 31, 2015
Purchased technology	$	114,754	$	(95,260	)	$	19,494
Patents	6,472		(6,472		)	—
Customer lists	37,000		(30,534		)	6,466
Trade names	11,536		(7,174		)	4,362
Backlog	2,127		(2,127		)	—
Total intangible assets	$	171,889	$	(141,567	)	$	30,322
December 31, 2014
Purchased technology	$	114,754	$	(87,398	)	$	27,356
Patents	6,472		(6,472		)	—
Customer lists	37,000		(26,284		)	10,716
Trade names	11,536		(6,384		)	5,152
Backlog	2,127		(2,127		)	—
Total intangible assets	$	171,889	$	(128,665	)	$	43,224