Basis of Presentation and Significant Accounting Policies (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Jan. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right of use assets	$ 18,600
Operating lease liabilities	$ 26,962
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right of use assets		$ 20,500
Operating lease liabilities		$ 28,600