Leases (Lease Assets and Liabilities) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Document Period End Date	Jun. 30, 2020
Assets
Operating lease assets	$ 105,400	$ 110,200
Current
Operating lease liabilities	35,300	34,900
Long-term
Operating lease liabilities	72,400	77,900
Finance lease liabilities	$ 14,200	$ 14,800