Goodwill And Other Intangible Assets (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Goodwill [Line Items]
Goodwill	$ 40,183		$ 40,183		$ 16,955
Amortization expense	$ 999	$ 542	$ 2,083	$ 1,626
Customer Relationships [Member]
Goodwill [Line Items]
Weighted-average amortization period of finite-lived intangible assets			8 years
Non-compete Agreements [Member]
Goodwill [Line Items]
Weighted-average amortization period of finite-lived intangible assets			8 years
Minimum [Member]
Goodwill [Line Items]
Weighted average useful life of acquired finite-lived intangible assets			7 years
Maximum [Member]
Goodwill [Line Items]
Weighted average useful life of acquired finite-lived intangible assets			10 years