Nature of Business, Basis of Presentation and Summary of Significant Accounting Policies (Leases) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Jan. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets	$ 143,436
Operating lease liabilities	$ 145,646
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets		$ 156,100
Operating lease liabilities		$ 154,500