Summary of Significant Accounting Policies - Additional Information (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2019 USD ($) Segment
Significant Accounting Policies [Line Items]
Number of reportable segments | Segment	1
Operating lease, right-of-use asset	$ 11,736
Operating lease, liability	13,058
ASU 2016-02
Significant Accounting Policies [Line Items]
Operating lease, right-of-use asset	11,700
Operating lease, liability	$ 13,100