Investing Receivables (Narrative) (Details) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2020 |
Dec. 31, 2019 |
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| Investing Receivables | ||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Notes receivable, fair value disclosure | $ 73.0 | $ 74.0 |
| Notes receivable from the City of Huntsville | LW Redstone Company, LLC | ||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Interest rate | 9.95% | |
| Note receivable term | 30 years | |
| Other investing loans receivable | ||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Interest rate | 8.00% | |
| Investing Receivables | ||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Accrued interest receivable, net of allowance for credit losses | $ 4.8 | $ 4.7 |
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- Definition Note Receivable Term No definition available.
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- Definition Note Receivable, Terms, Interest Rate No definition available.
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- Definition 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. No definition available.
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- Definition Amount, after allowance for credit loss, of accrued interest on financing receivable. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Fair value portion of an agreement for an unconditional promise by the maker to pay the holder a definite sum of money at a future date. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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