Business Overview, Basis of Presentation and Recent Accounting Pronouncements (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Lessee, Lease, Description [Line Items]
Total operating lease liabilities	$ 10,409
Operating lease right-of-use assets	8,239
Other long-term liabilities	$ 10,138		$ 2,119
ASU 2016-02
Lessee, Lease, Description [Line Items]
Total operating lease liabilities		$ 8,400
Operating lease right-of-use assets		8,400
Other long-term liabilities		$ 10,500