Goodwill and Intangible Assets (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011
Indicators of impairment			$ 0
Amortization expense of intangible assets	$ 1,200	$ 2,000	$ 3,588
Customer Relationships [Member]
Weighted-average remaining lives of intangible assets			6.9
Trade Name [Member]
Weighted-average remaining lives of intangible assets			13.8
Non-Compete Agreement [Member]
Weighted-average remaining lives of intangible assets			0.2