INTANGIBLE ASSETS (Tables)

12 Months Ended

Dec. 31, 2012

INTANGIBLE ASSETS

Schedule of components of intangible assets

	2012
	Cost		Accumulated amortization		Net book value
Patents and trademarks	$	15,466	$	5,317	$	10,149
Licenses	61,660		42,134		19,526
Intellectual property	7,006		6,995		11
Customer relationships	45,065		23,474		21,591
Backlog	1,823		538		1,285
Non-compete	2,827		2,827		—
In-process research and development	6,524		2,729		3,795
	$	140,371	$	84,014	$	56,357

	2011
	Cost		Accumulated amortization		Net book value
Patents and trademarks	$	10,822	$	5,368	$	5,454
Licenses	58,842		33,325		25,517
Intellectual property	6,856		6,614		242
Customer relationships	26,565		18,499		8,066
Non-compete	2,764		2,764		—
In-process research and development	5,419		2,141		3,278
	$	111,268	$	68,711	$	42,557

Schedule of estimated annual amortization expense

2013	$	16,348
2014		10,700
2015		5,355
2016		4,048
2017		3,758