Acquisitions, Goodwill, and Other Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2013

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The following table shows the changes in our goodwill balances from December 31, 2012 to March 31, 2013:

	($000)
Balance as of December 31, 2012	$	320,845
Net change, currency translation	(5,061		)
Balance as of March 31, 2013	$	315,784

Schedule of Intangible Assets

The following table summarizes our intangible assets: 

	As of March 31, 2013								As of December 31, 2012
($000)	Gross		Accumulated Amortization			Net		Weighted Average Useful  Life (years)	Gross		Accumulated Amortization			Net		Weighted Average Useful  Life (years)
Intellectual property	$	30,572	$	(22,132	)	$	8,440	9	$	30,621	$	(21,527	)	$	9,094	9
Customer-related assets	130,833		(65,110		)	65,723		12	132,798		(63,005		)	69,793		12
Supplier relationships	240		(99		)	141		20	240		(96		)	144		20
Technology-based assets	80,644		(45,341		)	35,303		9	81,333		(43,809		)	37,524		9
Non-competition agreement	1,768		(1,658		)	110		4	1,765		(1,588		)	177		4
Total intangible assets	$	244,057	$	(134,340	)	$	109,717	10	$	246,757	$	(130,025	)	$	116,732	10

Schedule of Intangible Asset, Amortization Expense

The following table summarizes our amortization expense related to intangible assets:

	Three months ended March 31
($000)	2013		2012
Amortization expense	$	5,625	$	6,055

Schedule of Expected Amortization Expense

We expect intangible amortization expense for 2013 and subsequent years as follows:

	($000)
2013	$	20,977
2014	19,759
2015	18,951
2016	14,360
2017	9,828
2018	7,875

Our estimates of future amortization expense for intangible assets may be affected by acquisitions, divestitures, changes in the estimated average useful life, and currency translations.