Recently Adopted Accounting Pronouncements - Narrative (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Jan. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease, liability	$ 7,393
Operating lease, right-of-use asset	6,582
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease, liability	7,400	$ 8,500
Operating lease, right-of-use asset	$ 6,600	$ 7,600