Percentage points added to the reference rate to compute the variable rate on the debt instrument.

No definition available.

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- Definition

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

+ References

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- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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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.

+ References

No definition available.

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- Definition

Weighted average interest rate of debt outstanding.

+ References

No definition available.

+ Details

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- Definition

Amount, before accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition

Amount of joint and several liability recognized in the balance sheet.

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- Definition

Amount of cash outflow for cost from early extinguishment and prepayment of debt. Includes, but is not limited to, third-party cost, premium paid, and other fee paid to lender directly for debt extinguishment or debt prepayment. Excludes accrued interest.

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- Definition

This is the principal amount outstanding for securitized loans only (across all types of loans).

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition

The cash outflow to repay long-term debt that is not secured by collateral. Excludes repayments of tax exempt unsecured debt.

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Debt - Additional Information (Details) - USD ($)	1 Months Ended	9 Months Ended		12 Months Ended
Debt - Additional Information (Details) - USD ($)	Sep. 30, 2018	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2007	Dec. 31, 2017
Debt Instrument [Line Items]
Repayments of debt		$ 151,000,000	$ 0
Payment of early extinguishment of debt charges		$ 0	55,000
LCIF [Member]
Debt Instrument [Line Items]
Weighted average interest rate	4.80%	4.80%			4.80%
Co-borrower debt	$ 91,188,000	$ 91,188,000			$ 157,789,000
Other Debt Instruments [Member]
Debt Instrument [Line Items]
Payment of early extinguishment of debt charges		$ 530,000	$ 3,000
Mortgages and Notes Payable [Member]
Debt Instrument [Line Items]
Weighted average interest rate	4.50%	4.50%			4.60%
Unsecured Debt [Member] \| Unsecured Credit Agreement [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 954,000,000	$ 954,000,000
Repayments of debt	$ 151,000,000
6.804% Trust Preferred Securities [Member]
Debt Instrument [Line Items]
Stated interest rate				6.804%
Face amount of debt instrument				$ 200,000,000
Interest rate, effective percentage	4.00%	4.00%
Principal amount outstanding	$ 129,120,000	$ 129,120,000			$ 129,120,000
Unamortized debt issuance costs	$ 1,849,000	$ 1,849,000			$ 1,924,000
6.804% Trust Preferred Securities [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Basis spread on variable rate				1.70%
Minimum [Member] \| LCIF [Member]
Debt Instrument [Line Items]
Stated interest rate	4.00%	4.00%			4.00%
Minimum [Member] \| Mortgages and Notes Payable [Member]
Debt Instrument [Line Items]
Stated interest rate	2.20%	2.20%			2.20%
Maximum [Member] \| LCIF [Member]
Debt Instrument [Line Items]
Stated interest rate	6.50%	6.50%			6.50%
Maximum [Member] \| Mortgages and Notes Payable [Member]
Debt Instrument [Line Items]
Stated interest rate	6.50%	6.50%			7.80%