Recent Accounting Guidance (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Jan. 01, 2019
Recent Accounting Guidance
Operating lease assets	$ 6,431
Lease liabilities	$ 6,409
ASU 2016-02 | Adjustment
Recent Accounting Guidance
Operating lease assets		$ 7,500
Lease liabilities		7,500
Reclassification of previously capitalized property, plant and equipment		22,100
Reclassification of prepaid transaction costs as finance lease assets		800
Increase in finance lease liability associated with the sale-leaseback		$ 800