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Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014 | Dec. 31, 2014
Significant Accounting Policies [Line Items] |  |  |  |  |
Amortization expense for intangible assets | $ 109,000 | $ 983,000 | $ 3,397,000 | $ 2,927,000 |
Amortization expense for intangible assets expected for remainder of 2015 | 3,809,000 |  | 3,809,000 |  |
Amortization expense for intangible assets expected for remainder of 2016 | 3,735,000 |  | 3,735,000 |  |
Depreciation expense | 4,594,000 | $ 2,326,000 | 13,064,000 | $ 5,737,000 |
Mortgage indebtedness, carrying amount | 602,408,000 |  | 602,408,000 |  | $ 400,509,000
Accumulated other comprehensive income | $ 5,000 |  | $ 5,000 |  |
Cash Flow Hedge | 1-month LIBOR |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |
Interest rate cap strike rate | 3.00% |  | 3.00% |  |
Cash Flow Hedge | Interest Rate Cap |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |
Derivative, notional amount | $ 200,000,000 |  | $ 200,000,000 |  |
Derivative, maturity date |  |  | Oct. 17, 2017 |  |
Derivative, fair value | 40,000 |  | $ 40,000 |  |
Accumulated other comprehensive income | 10,000 |  | 10,000 |  |
Reclassified out of accumulated other comprehensive income to earnings, amount | 0 |  | 0 |  |
Mortgages |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |
Indebtedness fair value | 597,547,000 |  | $ 597,547,000 |  | $ 411,311,000
Building and Building Improvements |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |
Depreciable Lives |  |  | 40 years |  |
Equipment and Fixtures | Minimum |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |
Depreciable Lives |  |  | 5 years |  |
Equipment and Fixtures | Maximum |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |
Depreciable Lives |  |  | 10 years |  |
Leases Acquired In Place |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |
Acquisition of above-market in-place leases | $ 7,471,000 |  | $ 7,690,000 |  |

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Significant accounting policies. + References No definition available. + Details
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- Definition Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e637-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e681-108580 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669686-108580 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 31 -Article 5 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 + Details
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- Definition The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 + Details
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- Definition Fair value of the assets less the liabilities of a derivative or group of derivatives. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41271-113958 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13433-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13495-108611 + Details
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- Definition The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624171-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4D -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624177-113959 + Details
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- Definition Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized in the remainder of the fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References No definition available. + Details
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- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. + References No definition available. + Details
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