Debt (Components of Interest Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Debt
Amortization of deferred financing costs	$ 1,045	$ 1,110	$ 2,067	$ 1,902
Gain (Loss) on Interest Rate Derivative Instruments Not Designated as Hedging Instruments	(371)	2,195	1,186	(55)
Unrealized Gain (Loss) on Cash Flow Hedging Instruments			1,186	(55)
Total Interest Expense	23,794	25,237	47,607	45,299
Senior Notes [Member]
Debt
Interest expense	5,940	5,944	11,883	11,888
Secured Debt [Member]
Debt
Interest expense	4,475	5,150	9,115	10,573
Revolver and Term Loans
Debt
Interest expense	$ 12,705	$ 10,838	$ 23,356	$ 20,991