XML 69 R38.htm IDEA: XBRL DOCUMENT

Goodwill and intangible assets (Schedule of intangible assets amortization expense) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2013	Mar. 31, 2012
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense	$ 5,974	$ 16,261

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.

+ References+ Details