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Amortization of Intangibles (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Segment Reporting Information [Line Items]
Amortization of intangibles	$ 9,594	$ 10,225	$ 13,231
CCS
Segment Reporting Information [Line Items]
Amortization of intangibles	4,230	4,588	7,553
ME
Segment Reporting Information [Line Items]
Amortization of intangibles	139	406	416
SMD
Segment Reporting Information [Line Items]
Amortization of intangibles	$ 5,225	$ 5,231	$ 5,262

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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