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Intangibles (Schedule Of Change In Intangible Assets, Net) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Intangibles [Abstract]
Beginning balance	$ 3,031	$ 2,587
Additions	70,831	1,370
Amortization	(11,866)	(886)	(1,100)
Sales		(40)
Ending balance	$ 61,996	$ 3,031	$ 2,587

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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