Goodwill And Intangible Assets (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Indicators of impairment
Amortization expense of intangible assets	$ 4,896	$ 5,311	$ 5,518
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