Lease Commitments (Summary of Future Required Fixed Payments Related to Leasing Arrangements) (Details) $ in Thousands	Dec. 31, 2019 USD ($)
Leases [Abstract]
2020	$ 26,837
2021	22,403
2022	21,444
2023	19,315
2024	18,409
2025 and thereafter	152,231
Total minimum future amounts	260,639
Impact of measuring the lease liability on a discounted basis	(63,000)
Total lease liability	$ 197,639