Basis of Presentation and Nature of Operations - Additional Information (Details) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2019 USD ($) Office	Jun. 30, 2019 Office Segment
Basis of Presentation and Nature of Operations [Line Items]
Number of operating segments | Segment		1
Number of reporting segments | Segment		1
Indirect and Selling Expenses
Basis of Presentation and Nature of Operations [Line Items]
Impairment expense related to intangible assets | $	$ 1.7
Domestic
Basis of Presentation and Nature of Operations [Line Items]
Number of offices | Office	69	69
International
Basis of Presentation and Nature of Operations [Line Items]
Number of offices | Office	15	15