New Accounting Pronouncements (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Jan. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Lease liability	$ 279,503
Operating lease right-of-use asset	$ 237,418
Accounting Standards Update 2016-02 - ASC 842
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Lease liability		$ 299,243
Operating lease right-of-use asset		$ 254,245