Goodwill and Purchased Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2013

Intangible Assets [Abstract]

Schedule of Goodwill [Table Text Block]

Goodwill

The changes in the carrying amount of goodwill are as follows:

Balance at December 31, 2011	$	4,492
Goodwill acquired during the period	10,756
Other, primarily currency translation	113
Balance at December 31, 2012	15,361
Goodwill acquired during the period	6,989
Other, primarily currency translation	203
Balance at December 31, 2013	$	22,553

Schedule of Finite-Lived Intangible Assets [Table Text Block]

Purchased intangible assets as of December 31, 2012 and 2013 are as follows:

	Gross Carrying Amount		Accumulated Amortization		Net
December 31, 2012
Finite-lived intangibles:
Developed technology	$	58,961	$	49,358	$	9,603
Customer and distributor relationships	8,712		7,102		1,610
Trade names	4,361		3,216		1,145
Total identifiable intangible assets	$	72,034	$	59,676	$	12,358
December 31, 2013
Finite-lived intangibles:
Developed technology	$	59,831	$	51,496	$	8,335
Customer and distributor relationships	9,560		7,449		2,111
Trade names	4,361		3,343		1,018
Total identifiable intangible assets	$	73,752	$	62,288	$	11,464