Goodwill And Intangible Assets (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2013	Mar. 31, 2012
Indicators of impairment
Amortization expense of intangible assets	$ 1,138	$ 1,329
Customer Relationships [Member]
Weighted-average remaining lives of intangible assets	6 years 3 months 18 days
Trade Name [Member]
Weighted-average remaining lives of intangible assets	7 years 7 months 6 days

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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Loss recognized during the period that results from the write-down of goodwill after comparing the implied fair value of reporting unit goodwill with the carrying amount of that goodwill. Goodwill is assessed at least annually for impairment.

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