Debt (Components of Interest Expense) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Debt
Amortization of deferred financing costs	$ 1,364	$ 1,045	$ 2,685	$ 2,067
Gain (Loss) on Interest Rate Derivative Instruments Not Designated as Hedging Instruments	0	(371)	0	1,186
Unrealized Gain (Loss) on Cash Flow Hedging Instruments				1,186
Total Interest Expense	26,366	23,794	54,261	47,607
Senior Notes [Member]
Debt
Interest expense	6,685	5,940	12,627	11,883
Secured Debt [Member]
Debt
Interest expense	4,294	4,475	7,748	9,115
Revolver and Term Loans
Debt
Interest expense	$ 14,023	$ 12,705	$ 31,201	$ 23,356

Amount of amortization expense attributable to debt issuance costs.

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Amount of gain (loss) included in earnings for the period from the increase (decrease) in fair value of interest rate derivatives not designated as hedging instruments.

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Amount of the cost of borrowed funds accounted for as interest expense.

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Represents the portion of interest incurred in the period on debt arrangements that was charged against earnings, excluding amortization of debt discount (premium) and financing costs.

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Amount of unrealized gain (loss) related to derivatives designated as cash flow hedging instruments, recorded in results of operations to the extent that the cash flow hedge is determined to be ineffective.

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