Goodwill and Acquired Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2013

Notes To Financial Statements [Abstract]

Summary of Goodwill by Reportable Segment

The change in the carrying value of goodwill for the nine months ended September 30, 2013 by our reportable segments, which are also our reporting units, is as follows (in thousands):

	Clear Aligner			SCCS			Total
Balance as of December 31, 2012	$	58,543		$	40,693		$	99,236
Goodwill from ICA acquisition	3,509			—			3,509
Impairment of goodwill	—			(40,693		)	(40,693		)
Adjustments 1	(307		)	—			(307		)
Balance as of September 30, 2013	$	61,745		$	—		$	61,745

Schedule Of Amortized Intangible Assets

Intangible assets arising either as a direct result from the Cadent acquisition or individually acquired are being amortized as follows (in thousands):

	Weighted Average Amortization Period (in years)	Gross Carrying Amount as of September 30, 2013		Accumulated Amortization			Accumulated Impairment Loss			Net Carrying Value as of September 30, 2013
Trademarks	15	$	7,100	$	(1,069	)	$	(4,179	)	$	1,852
Existing technology	13	12,600		(2,109		)	(4,328		)	6,163
Customer relationships	11	33,500		(6,657		)	(10,751		)	16,092
Other	7	285		(30		)	—			255
		$	53,485	$	(9,865	)	$	(19,258	)	$	24,362

	Weighted Average Amortization Period (in years)	Gross Carrying Amount as of December 31, 2012		Accumulated Amortization			Net Carrying Value as of December 31, 2012
Trademarks	15	$	7,100	$	(895	)	$	6,205
Existing technology	13	12,600		(1,642		)	10,958
Customer relationships	11	33,500		(5,002		)	28,498
Other	8	125		(9		)	116
		$	53,325	$	(7,548	)	$	45,777

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

The total estimated annual future amortization expense for these acquired intangible assets as of September 30, 2013 is as follows (in thousands):

Fiscal Year Ending December 31,
Remainder of 2013	$	662
2014	2,635
2015	2,629
2016	2,629
2017	2,629
Thereafter	13,178
Total	$	24,362