Basis of Presentation and Significant Accounting Policies New Accounting Pronouncements (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Accounting Policies [Abstract]
Operating lease right-of-use assets	$ 75,524	$ 68,131
Accrued liabilities and other	16,402	15,850
Operating lease liabilities	$ 60,693	$ 53,919