Fair Value Measurements Narrative (Details) (USD $)	9 Months Ended	12 Months Ended
	Sep. 30, 2011	Dec. 31, 2010
Fair value of future consideration payments liability, current		$ 5,300,000
Investments transferred from Level 2 to Level 1	0
Impairment related to fair value measurement on a nonrecurring basis		10,200,000
Amount included in intangible asset related		8,200,000
Customer relationship intangible assets value after impairment		2,000,000
Noncompete agreement intangible assets value after impairment		800,000
Fixed assets value after impairment		700,000
Remaining Net Book Value Of Intangible Assets Previously Impaired	3,000,000
Sun Trust Acquisition [Member]
Fair value of future consideration payments liability, current	5,000,000
Fair value of future consideration payments liability, noncurrent	$ 13,400,000
Maximum [Member]
Probability-weighted scenarios assumed growth rates in assets		9.00%
Minimum [Member]
Probability-weighted scenarios assumed growth rates in assets		(100.00%)