Basis of Presentation and Recently Issued Accounting Pronouncements - Additional Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2016 USD ($) ProfessionalGroup	Mar. 31, 2015 USD ($)	Dec. 31, 2015 USD ($)
Business And Basis Of Presentation [Line Items]
Assets	$ 314,995		$ 316,049
Liabilities	175,880		179,561
Less: net (income) loss attributable to noncontrolling interest	$ (855)	$ (600)
VIEs
Business And Basis Of Presentation [Line Items]
Number of professional groups | ProfessionalGroup	6
Assets	$ 1,600		1,400
Liabilities	600		$ 600
Less: net (income) loss attributable to noncontrolling interest	$ 900	$ 600