Leases (Lease Assets and Lease Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018	Dec. 31, 2017
Lease Right-of-Use Assets
Operating lease right-of-use assets	$ 100,838	$ 106,514	$ 0	$ 0
Finance lease right-of-use assets	2,376
Total Lease Right-of-Use Assets	103,214
Lease Liabilities
Operating lease liabilities	108,210	$ 113,394	$ 0	$ 0
Finance lease liabilities	10,565
Total Lease Liabilities	$ 118,775