Investing Receivables (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2018 |
Dec. 31, 2017 |
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| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Investing receivables | $ 56,982 | $ 57,493 |
| Investing Receivable [Member] | ||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Fair value of investing receivables | 58,200 | 58,300 |
| Notes receivable from City of Huntsville [Member] | ||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Investing receivables | $ 53,961 | 54,472 |
| Notes receivable from City of Huntsville [Member] | LW Redstone Company, LLC [Member] | ||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Stated interest rate (as a percent) | 9.95% | |
| Debt instrument, term | 30 years | |
| Other investing loans receivable [Member] | ||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Investing receivables | $ 3,021 | $ 3,021 |
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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 Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. No definition available.
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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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- Definition Net amount of the investment in a contractual right to receive money on demand or on fixed or determinable dates that is recognized as an asset in the creditor's statement of financial position. Examples include, but are not limited to, credit card receivables, notes receivable and receivables relating to lessor's rights to payments from leases other than operating leases that have been recorded as assets. Excludes trade accounts receivable with contractual maturity of one year or less and arose from the sale of goods or services. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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