Goodwill and Intangibles - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Intangible Assets [Line Items]
Goodwill	$ 69,178		$ 69,178		$ 69,178
Amortization of intangible assets	1,500	$ 1,300	4,357	$ 4,114
Professional Services
Intangible Assets [Line Items]
Goodwill	$ 8,648		$ 8,648		$ 8,648