Goodwill and Intangible Assets - Narrative (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Goodwill and Intangible Assets Disclosure [Abstract]
Aggregate amortization expense	$ 3,800,000	$ 3,400,000	$ 11,200,000	$ 10,400,000
Intangible assets impairment charge	1,102,000	8,089,000	1,102,000	8,089,000
Fair value reductions to contingent consideration liability	$ 874,000	$ 3,800,000