Debt (Schedule of Interest Expense) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Schedule of Interest Expense [Abstract]
Interest Expense, Debt, Excluding Amortization	$ 13,074	$ 10,527
Derivative Instruments, Loss Reclassified from Accumulated OCI into Income, Effective Portion	292	276
Interest Costs Capitalized Adjustment	157	24
Amortization Of Financing Costs, Exclusive Of Amounts Written Off	893	835
Interest Expense	$ 13,518	$ 11,614