Debt (Schedule of Interest Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Schedule of Interest Expense [Abstract]
Interest expense on debt at contractual rates	$ 13,355	$ 11,414	$ 26,429	$ 21,941
Losses reclassified from accumulated other comprehensive income (loss) into interest expense	349	76	641	352
Capitalized interest	(158)	(47)	(315)	(71)
Amortization of debt issuance costs and debt discount	898	777	1,791	1,612
Total Interest Expense	$ 13,746	$ 12,220	$ 27,264	$ 23,834