Recent Accounting Developments (Future Required Fixed Payments) (Details) $ in Thousands	Jun. 30, 2019 USD ($)
Accounting Changes and Error Corrections [Abstract]
Remaining in 2019	$ 14,836
2020	23,114
2021	21,257
2022	20,517
2023	18,407
2024	17,353
2025 and thereafter	146,109
Total minimum future amounts	261,593
Impact of measuring the lease liability on a discounted basis	(66,505)
Total lease liability	$ 195,088