Basis of Presentation - Recently Adopted Accounting Standards (Details) - USD ($) $ in Thousands	Jan. 01, 2019	Sep. 30, 2019
Accounting Changes
Lease, Practical Expedients, Package	true
Operating lease right-of-use assets		$ 10,472
Operating lease liability		$ 10,796
ASU 2016-02
Accounting Changes
Change in Accounting Principle, Accounting Standards Update, Adopted	true
ASU 2016-02 | Adjustment
Accounting Changes
Operating lease right-of-use assets	$ 14,200
Operating lease liability	$ 14,200