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Mortgage Notes Payable, Revolving Credit Facility, and Term Loan Facility (Detail) $ in Thousands |  | 12 Months Ended |
--- | --- | --- | ---
Oct. 27, 2017 | Dec. 31, 2017 USD ($) property | Dec. 31, 2016 USD ($)
Debt Instrument [Line Items] |  |  |
Encumbered properties | property |  | 96 |
Long-term debt |  | $ 542,627 | $ 509,395
Revolving Credit Facility |  |  |
Debt Instrument [Line Items] |  |  |
Encumbered properties | property |  | 29 |
Long-term debt |  | $ 20,715 | 39,225
Fixed rate mortgage loans |  |  |
Debt Instrument [Line Items] |  |  |
Encumbered properties | property |  | 48 |
Carrying value |  | $ 383,189 | 378,477
Variable rate mortgage loans |  |  |
Debt Instrument [Line Items] |  |  |
Encumbered properties | property |  | 19 |
Carrying value |  | $ 69,302 | 71,707
Mortgage Notes Payable |  |  |
Debt Instrument [Line Items] |  |  |
Encumbered properties | property |  | 67 |
Carrying value |  | $ 452,491 |
Premiums and discounts, net |  | (281) | 217
Deferred financing costs, net |  | (4,830) | (5,123)
Long-term debt |  | $ 447,380 | 445,278
Variable rate Line of Credit | Revolving Credit Facility |  |  |
Debt Instrument [Line Items] |  |  |
Encumbered properties | property |  | 29 |
Carrying value |  | $ 21,400 | 39,700
Deferred financing costs, net |  | $ (685) | (475)
Libor rate (as percent) |  | 1.75% |
Scheduled maturity dates |  | Oct. 27, 2021 |
Variable rate Term Loan Facility |  |  |
Debt Instrument [Line Items] |  |  |
Carrying value |  | $ 75,000 | 25,000
Libor rate (as percent) |  | 1.70% |
Scheduled maturity dates |  | Oct. 27, 2022 |
Term Loan Facility |  |  |
Debt Instrument [Line Items] |  |  |
Deferred financing costs, net |  | $ (468) | (108)
Long-term debt |  | $ 74,532 | $ 24,892
London Interbank Offered Rate (LIBOR) |  |  |
Debt Instrument [Line Items] |  |  |
Libor rate (as percent) | 2.75% | 1.56% |

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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 Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: 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(a)(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: 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 Reference 3: 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 + Details
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