Fair Value Measurements - Financial Assets and Liabilities Measured at Fair Value (Details) - Recurring - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Fair Value Measurements
Investments in U.S. Treasury bills		$ 266,963
Interest rate derivatives (included in other assets)	$ 22,608	29,351
Total assets		296,314
Level 1
Fair Value Measurements
Investments in U.S. Treasury bills		266,963
Interest rate derivatives (included in other assets)	0	0
Total assets		266,963
Level 2
Fair Value Measurements
Investments in U.S. Treasury bills		0
Interest rate derivatives (included in other assets)	22,608	29,351
Total assets		29,351
Level 3
Fair Value Measurements
Investments in U.S. Treasury bills		0
Interest rate derivatives (included in other assets)	$ 0	0
Total assets		$ 0

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
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Fair value as of the balance sheet date of interest rate derivative assets, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as assets.

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Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

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