Leases (Operating and Finance Lease Assets and Liabilities) (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2019 USD ($)
Leases [Abstract]
Asset, operating	$ 81,534
Asset, finance	8,098
Total leased assets	89,632
Present value of lease liabilities	80,562
Present value of lease liabilities	7,459
Total lease liabilities	88,021
Operating lease, fair value adjustment	1,100
Accumulated deprecation on finance leases	$ 447