Basis of Presentation - Recently Adopted Accounting Standards (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Operating lease right-of-use assets	$ 36,930	$ 35,436	$ 35,111
Total operating lease liabilities	$ 36,992	$ 35,322	$ 34,811