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Debt (Details Textual) - USD ($) | 1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Aug. 31, 2016 | Jul. 28, 2016 | May 28, 2015 | Mar. 31, 2016 | Sep. 30, 2016 | Sep. 30, 2015 | Dec. 31, 2015
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term Line of Credit |  |  |  |  | $ 47,000,000 |  | $ 18,000,000
Long-term Debt, Total |  |  |  |  | 437,808,000 |  |
Secured Debt |  |  |  |  | 69,594,000 |  | 100,391,000
Unsecured Debt |  |  |  |  | 159,211,000 |  | 99,390,000
Repayments Of Secured Debt |  |  |  |  | 31,059,000 | $ 4,467,000 |
Unamortized Debt Issuance Expense |  |  |  |  | 2,800,000 |  | 2,700,000
Private Placement [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Unsecured Debt |  |  | $ 100,000,000 |  |  |  |
Debt [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term Debt, Total |  |  |  |  | 437,800,000 |  |
Secured Debt |  |  |  |  | 70,600,000 |  |
Unsecured Debt |  |  |  |  | 160,200,000 |  |
Revolving Credit and Term Loan Facility [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  |  |  | $ 250,000,000 |  |
Senior Unsecured Note 2028 [Member] | Private Placement [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Unsecured Debt |  | $ 60,000,000 |  |  |  |  |
2019 Term Loan [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Unsecured Debt | $ 20,200,000 |  |  |  |  |  |
Mortgage Note Payable [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term Debt, Weighted Average Interest Rate |  |  |  |  | 4.83% |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 6.56% |  |  |
Real Estate Investments, Net |  |  |  |  | $ 90,500,000 |  |
Secured Debt |  |  |  |  | $ 70,600,000 |  |
Repayments Of Secured Debt |  |  |  | $ 8,600,000 |  |  |
2021 Term Loan [Member] | Revolving Credit and Term Loan Facility [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  | 3.74% |  |
Unsecured Debt |  |  |  |  | $ 65,000,000 |  | 65,000,000
2020 Term Loan [Member] | Revolving Credit and Term Loan Facility [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Unsecured Debt |  |  |  |  |  |  | 35,000,000
Unsecured Debt [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term Debt, Weighted Average Interest Rate |  |  | 4.21% |  |  |  |
Debt Instrument, Maturity Date |  |  | May 31, 2025 |  |  |  |
Unsecured Debt |  |  |  |  | 159,211,000 |  | 99,390,000
Unamortized Debt Issuance Expense |  |  |  |  | 1,012,000 |  | 610,000
Unsecured Debt [Member] | Weighted Average [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt Instrument, Term |  |  | 11 years |  |  |  |
Unsecured Debt [Member] | Senior Unsecured Note 2028 [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt Instrument, Maturity Date |  | Jul. 28, 2028 |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 4.42% |  |  |  |  |
Unsecured Debt [Member] | 2019 Term Loan [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt Instrument, Face Amount | $ 20,300,000 |  |  |  |  |  |
Debt Instrument, Maturity Date | May 31, 2019 |  |  |  |  |  |
Unsecured Debt One [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  | $ 50,000,000 |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  | 4.16% |  |  |  |
Unsecured Debt Two [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  | $ 50,000,000 |  |  |  |
Debt Instrument, Maturity Date |  |  | May 30, 2027 |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  | 4.26% |  |  |  |
Mortgage Notes Payable [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt Instrument, Maturity Date | May 31, 2017 |  |  |  |  |  |
Debt Instrument, Description of Variable Rate Basis | LIBOR plus 170 basis points |  |  |  |  |  |
Secured Debt |  |  |  |  | 70,586,000 |  | 101,584,000
Repayments Of Secured Debt | $ 20,300,000 |  |  |  |  |  |
Unamortized Debt Issuance Expense |  |  |  |  | 992,000 |  | 1,193,000
Revolving Credit Facility [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  | 150,000,000 |  |
Long-term Line of Credit |  |  |  |  | 150,000,000 |  |
Revolving Credit Facility [Member] | Revolving Credit and Term Loan Facility [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term Line of Credit |  |  |  |  | $ 47,000,000 |  |
Long-term Debt, Weighted Average Interest Rate |  |  |  |  | 1.87% |  |
Debt Instrument, Face Amount |  |  |  |  | $ 103,000,000 |  |
Revolving Credit Facility [Member] | 2019 Term Loan [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt Instrument, Maturity Date | May 31, 2019 |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  | 3.62% |  |
Debt Instrument, Description of Variable Rate Basis | LIBOR plus 170 basis points. In order to fix LIBOR on the 2019 Term Loan at 1.92% until maturity |  |  |  |  |  |
Unsecured Debt | $ 20,300,000 |  |  |  |  |  |
Revolving Credit Facility [Member] | 2021 Term Loan [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt Instrument, Maturity Date |  |  |  |  | Jul. 21, 2021 |  |
Debt Instrument, Description of Variable Rate Basis |  |  |  |  | interest rate swaps to fix LIBOR at 2.09% until maturity |  |
Revolving Credit Facility [Member] | 2020 Term Loan [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  | 3.85% |  |
Debt Instrument, Description of Variable Rate Basis | LIBOR plus 165 to 225 basis points, depending on the Companys leverage, and the Company entered into interest rate swaps to fix LIBOR at 2.20% until maturity |  |  |  | interest rate swap to fix LIBOR at 1.40% |  |
Unsecured Debt |  |  |  |  | $ 35,000,000 |  |
Revolving Credit Facility [Member] | 2023 Term Loan [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  | $ 40,000,000 |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  | 3.05% |  |
Debt Instrument, Description of Variable Rate Basis |  |  |  |  | LIBOR plus 165 to 225 basis points, depending on the Company’s leverage. The Company entered into interest rate swap to fix LIBOR at 1.40% until maturity. |  |
Unsecured Debt |  |  |  |  | $ 40,000,000 |  |
Senior Unsecured Notes [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Unsecured Debt |  |  |  |  | 160,000,000 |  |
April 4 2018 [Member] | Mortgage Notes Payable [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Secured Debt |  |  |  |  | $ 25,000,000 |  | 25,000,000
April 4 2018 [Member] | Mortgages [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt Instrument, Description of Variable Rate Basis |  |  |  |  | interest only at LIBOR plus 160 basis points, swapped to a fixed rate of 2.49% |  |
January 1 2023 [Member] | Mortgage Notes Payable [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Secured Debt |  |  |  |  | $ 23,640,000 |  | 23,640,000
January 1 2023 [Member] | Mortgages [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  | 3.60% |  |
January 2020 [Member] | Mortgage Notes Payable [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Secured Debt |  |  |  |  | $ 5,483,000 |  | 6,553,000
January 2020 [Member] | Mortgages [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt Instrument, Periodic Payment, Principal |  |  |  |  | $ 153,838 |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  | 6.90% |  |
July 2026 [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Secured Debt |  |  |  |  | $ 8,059,000 |  | $ 8,493,000
July 2026 [Member] | Mortgages [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt Instrument, Periodic Payment, Principal |  |  |  |  | $ 91,675 |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  | 6.27% |  |
March 11 2016 [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  | 6.56%
March 11 2016 [Member] | Mortgage Notes Payable [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Secured Debt |  |  |  |  | $ 0 |  | $ 8,580,000
February 2020 [Member] | Mortgage Notes Payable [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Secured Debt |  |  |  |  | 3,070,000 |  | 3,129,000
February 2020 [Member] | Mortgages [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt Instrument, Periodic Payment, Principal |  |  |  |  | 23,004 |  |
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid |  |  |  |  | $ 2,781,819 |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  | 6.24% |  |
September 2023 [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Secured Debt |  |  |  |  | $ 5,334,000 |  | 5,448,000
September 2023 [Member] | Mortgages [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt Instrument, Periodic Payment, Principal |  |  |  |  | 35,673 |  |
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid |  |  |  |  | $ 4,034,627 |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  | 5.01% |  |
August 19 2016 [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt Instrument, Periodic Payment, Principal |  |  |  |  |  |  | 56,380
August 19 2016 [Member] | Mortgage Notes Payable [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Secured Debt |  |  |  |  | $ 0 |  | 20,741,000
August 19 2016 [Member] | Mortgages [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid |  |  |  |  |  |  | $ 20,283,000
Debt Instrument, Description of Variable Rate Basis |  |  |  |  |  |  | interest at 170 basis points over LIBOR, swapped to a fixed rate of 3.62%

X
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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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- Definition Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format. + 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)(2)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the 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)) -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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- Definition Amount of real estate investments, net of accumulated depreciation, which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; (7) other real estate investments; (8) real estate joint ventures; and (9) unconsolidated real estate and other joint ventures not separately presented. + 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 210.7-03.1(d)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower. + References Reference 1: 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 2: 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 3: 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 + Details
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- Definition The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset. + 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 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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