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v3.10.0.1

Debt - Additional Information (Details) - USD ($) | 1 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
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%

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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 + Details
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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 -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6036836-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28555-108399 + Details
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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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585 + Details
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