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Fair Value Measurements and Interest Rate Swaps - Interest Rate Swap (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Jun. 09, 2020	Dec. 31, 2019
Interest Rate Swap
Derivative [Line Items]
Fair Value of Assets (Liabilities)	$ (12,617)		$ (2,545)
Interest Rate Swap | $50 million term loan
Derivative [Line Items]
Rate Fixed	2.41%
Notional Amount	$ 50
Fair Value of Assets (Liabilities)	$ (3,231)		(1,597)
Interest Rate Swap | $350 million term loan
Derivative [Line Items]
Rate Fixed	1.70%
Notional Amount	$ 175
Fair Value of Assets (Liabilities)	(9,386)		$ (948)
Unsecured Term Loan
Derivative [Line Items]
Hedged Debt		$ 400,000
Unsecured Term Loan | $50 million term loan
Derivative [Line Items]
Hedged Debt	50,000
Unsecured Term Loan | $350 million term loan
Derivative [Line Items]
Hedged Debt	$ 350,000

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- Definition

Face (par) amount of debt instrument at time of issuance.

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Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

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