Leases (Schedule of Lease Costs) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Leases [Abstract]
Operating lease cost	$ 34,850
Finance lease cost:
Amortization of right-of-use assets	807
Interest on lease liabilities	161
Variable lease cost	120
Sublease income	(81)
Net lease cost	$ 35,857