Leases (Lease Maturity Schedule) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Jan. 01, 2019	Dec. 31, 2018	Jan. 01, 2018
Finance Leases
June 30, 2020	$ 825
June 30, 2021	825
June 30, 2022	825
June 30, 2023	825
June 30, 2024	825
Thereafter	23,518
Total Future Minimum Lease Payments	27,643
Amounts Representing Interest	(17,038)
Present Value of Net Future Minimum Lease Payments, Finance Leases	10,605
Operating Leases
June 30, 2020	12,438
June 30, 2021	11,308
June 30, 2022	10,989
June 30, 2023	9,910
June 30, 2024	8,929
Thereafter	103,800
Total Future Minimum Lease Payments	157,374
Amounts Representing Interest	(46,891)
Present Value of Net Future Minimum Lease Payments, Operating Leases	$ 110,483	$ 113,394	$ 0	$ 0