Commitments and Contingencies (Schedule of Lease Commitments) (Details) $ in Thousands	Dec. 31, 2018 USD ($)
Operating Leases
2019	$ 57,122
2020	49,358
2021	39,981
2022	35,296
2023	32,018
Thereafter	87,621
Total	301,396
Sublease Income
2019	241
2020	0
2021	0
2022	0
2023	0
Thereafter	0
Total	$ 241