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Indebtedness - Additional Information (Detail) - USD ($) $ in Thousands |  | 3 Months Ended |
--- | --- | --- | ---
Jan. 03, 2018 | Mar. 31, 2018 | Dec. 31, 2017
Debt Instrument [Line Items] |  |  |
Outstanding Principal |  | $ 909,404 | $ 784,640
Hartshire Lakes |  |  |
Debt Instrument [Line Items] |  |  |
Outstanding Principal | $ 16,000 |  |
Debt interest rate | 4.68% |  |
Interest payment period |  | monthly |
Weighted Average Maturity (in years) | 30 years |  |
Maturity date | Jan. 31, 2025 |  |
Outstanding Principal, fair value | $ 15,936 |  |
Creekside Corners |  |  |
Debt Instrument [Line Items] |  |  |
Outstanding Principal | $ 23,500 |  |
Debt interest rate | 4.56% |  |
Interest payment period |  | monthly |
Weighted Average Maturity (in years) | 30 years |  |
Maturity date | Jan. 31, 2025 |  |
Outstanding Principal, fair value | $ 23,426 |  |

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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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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