Leases (Schedule of Operating Lease Expense) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Operating Leased Assets [Line Items]
Finance Lease, Right-of-Use Asset, Amortization	$ 562
Finance Lease, Interest Expense	40
Finance Lease, Cost	602
Operating Lease, Cost	20,639
Subsidiaries [Member] | Land [Member]
Operating Leased Assets [Line Items]
Operating Lease, Cost	$ 1,000