Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2014

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, 2014 is as follows (in thousands):

For the Years Ending December 31,	Estimated Intangible Amortization Amount
2015	$	12,901
2016	12,747
2017	10,714
2018	4,870
2019	790
Thereafter	1,202
Total estimated future amortization expense	$	43,224

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, 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
December 31, 2013
Purchased technology	$	114,754	$	(79,189	)	$	35,565
Patents	6,472		(6,472		)	—
Customer lists	37,000		(21,997		)	15,003
Trade names	11,536		(5,594		)	5,942
Backlog	2,127		(2,127		)	—
Total intangible assets	$	171,889	$	(115,379	)	$	56,510