Recently Issued Accounting Pronouncements - Additional Information (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Jan. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease assets	$ 19,793	$ 21,200
Total operating lease liabilities	$ 20,994	22,200
Adoption of ASU 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of adoption of Topic 842		72
Retained Deficit | Adoption of ASU 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of adoption of Topic 842		$ 72