The maximum amount of borrowing capacity that can be offered by the lender in a line of credit agreement.

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The loss amount to be reimbursed per a contract

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

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Face (par) amount of debt instrument at time of issuance.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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Amount of the required periodic payments applied to principal.

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Amount of payment greater than the preceding installment payments to be paid at final maturity date of debt.

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The percentage points added to the reference rate to compute the variable rate on the interest rate derivative.

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Fixed interest rate related to the interest rate derivative.

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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.

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The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

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No definition available.

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Amount of increase (decrease) of the credit facility.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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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.

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Weighted average interest rate of long-term debt outstanding calculated at point in time.

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The cash inflow associated with the amount received from entity's raising of capital via private rather than public placement.

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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.

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The cash outflow to repay long-term debt that is wholly or partially secured by collateral. Excludes repayments of tax exempt secured debt.

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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.

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Including the current and noncurrent portions, carrying value as of the balance sheet date of uncollateralized debt obligations (with maturities initially due after one year or beyond the operating cycle if longer).

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Debt (Details) - USD ($)	1 Months Ended					12 Months Ended
Debt (Details) - USD ($)	Dec. 31, 2018	Jul. 31, 2018	Aug. 31, 2016	Jul. 31, 2016	May 31, 2015	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Sep. 30, 2018	Jun. 30, 2018	Aug. 31, 2017	Nov. 18, 2014
Debt Instrument [Line Items]
Long-term Line of Credit	$ 19,000,000					$ 19,000,000	$ 14,000,000
Long-term Debt, Total	724,062,000					724,062,000
Secured Debt	60,926,000					60,926,000	88,270,000
Unsecured Debt	256,419,000					256,419,000	158,171,000
Repayments Of Secured Debt						27,576,000	$ 2,412,000	$ 31,578,000
Private Placement [Member]
Debt Instrument [Line Items]
Unsecured Debt											$ 100,000,000
Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Total	720,400,000					720,400,000
Secured Debt	60,900,000					60,900,000
Revolving Credit and Term Loan Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 350,000,000					$ 350,000,000
Mortgage Note Payable [Member]
Debt Instrument [Line Items]
Long-term Debt, Weighted Average Interest Rate	4.13%					4.13%	3.74%
Debt Instrument, Interest Rate, Stated Percentage	3.32%					3.32%
Real Estate Investments, Net	$ 108,000,000					$ 108,000,000
Secured Debt	61,500,000					61,500,000
Repayments Of Secured Debt						21,500,000
Unsecured Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date				Jul. 31, 2028
Debt Instrument, Interest Rate, Stated Percentage				4.42%
Unsecured Debt	$ 256,419,000					$ 256,419,000	$ 158,171,000
Unsecured Debt [Member] \| 2019 Term Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.62%					3.62%
Unsecured Debt	$ 18,500,000		$ 20,300,000			$ 18,500,000
Unsecured Debt [Member] \| 2019 Term Loan [Member] \| LIBOR
Debt Instrument [Line Items]
Spread on variable rate			1.70%
Unsecured Debt [Member] \| 2019 Term Loan [Member] \| Interest Rate Swap [Member] \| LIBOR
Debt Instrument [Line Items]
Derivative, spread on variable rate			1.92%
Unsecured Debt [Member] \| 2023 Term Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 40,000,000					$ 40,000,000	40,000,000
Debt Instrument, Interest Rate, Stated Percentage	2.40%					2.40%
Unsecured Debt	$ 40,000,000			$ 40,000,000		$ 40,000,000
Unsecured Debt [Member] \| 2023 Term Loan [Member] \| Interest Rate Swap [Member] \| LIBOR
Debt Instrument [Line Items]
Spread on variable rate				1.40%
Unsecured Debt [Member] \| 2024 Term Loan Facility One [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	65,000,000					$ 65,000,000
Unsecured Debt [Member] \| 2024 Term Loan Facility One [Member] \| Interest Rate Swap [Member] \| LIBOR
Debt Instrument [Line Items]
Spread on variable rate						213.00%
Unsecured Debt [Member] \| 2024 Term Loan Facility Two [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 35,000,000					$ 35,000,000
Unsecured Debt [Member] \| 2024 Term Loan Facilities [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date						Jan. 31, 2024
Debt Instrument, Interest Rate, Stated Percentage	3.13%					3.13%
Debt Instrument, Description of Variable Rate Basis						LIBOR
Unsecured Debt	$ 100,000,000					$ 100,000,000
Unsecured Debt [Member] \| 2026 Term Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 100,000,000					$ 100,000,000
Debt Instrument, Interest Rate, Stated Percentage	4.26%					4.26%
Debt Instrument, Description of Variable Rate Basis	LIBOR
Unsecured Debt	$ 100,000,000					$ 100,000,000
Unsecured Debt [Member] \| 2026 Term Loan [Member] \| Interest Rate Swap [Member] \| LIBOR
Debt Instrument [Line Items]
Derivative, spread on variable rate	2.66%					2.66%
Unsecured Debt One [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount					$ 50,000,000
Debt Instrument, Maturity Date					May 31, 2025
Debt Instrument, Interest Rate, Stated Percentage					4.16%						4.19%
Unsecured Debt Two [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount					$ 50,000,000
Debt Instrument, Maturity Date					May 31, 2027
Debt Instrument, Interest Rate, Stated Percentage					4.26%
Unsecured Debt Three [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount									$ 125,000,000
Debt Instrument, Interest Rate, Stated Percentage									4.32%
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 306,000,000	$ 325,000,000				$ 306,000,000				$ 250,000,000
Line Of Credit Facility Maximum Limit Of Borrowing Capacity	500,000,000					500,000,000
Long-term Line of Credit	$ 19,000,000					$ 19,000,000	$ 14,000,000
Long-term Debt, Weighted Average Interest Rate	3.38%					3.38%	2.60%
Debt Instrument, Description of Variable Rate Basis						Borrowings under the revolving credit facility bear interest at LIBOR plus 85 to 155 basis points, depending on the Company's credit rating.
Line of Credit Facility, Increase (Decrease), Net		$ 75,000,000
Revolving Credit Facility [Member] \| 2019 Term Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Description of Variable Rate Basis			LIBOR
Revolving Credit Facility [Member] \| 2023 Term Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Description of Variable Rate Basis				LIBOR
Unsecured Term Loan [Member]
Debt Instrument [Line Items]
Unsecured Debt	$ 256,400,000					$ 256,400,000
Senior Unsecured Notes [Member]
Debt Instrument [Line Items]
Unsecured Debt	$ 384,100,000					$ 384,100,000
Proceeds from Issuance of Private Placement				$ 60,000,000	$ 100,000,000
April4 2018 [Member] \| Mortgages [Member]
Debt Instrument [Line Items]
Fixed interest rate	2.49%					2.49%
Repayments Of Secured Debt						$ 25,000,000
April4 2018 [Member] \| Mortgages [Member] \| LIBOR
Debt Instrument [Line Items]
Debt Instrument, Description of Variable Rate Basis						LIBOR
Spread on variable rate						1.60%
January 2020 [Member] \| Mortgages [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment, Principal						$ 153,838
Debt Instrument, Interest Rate, Stated Percentage	6.90%					6.90%
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					$ 2,781,819
Debt Instrument, Interest Rate, Stated Percentage	6.24%					6.24%
January 1, 2023 [Member] \| Mortgages [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.60%					3.60%
September 2023 [Member] \| Mortgage Note Payable [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid	$ 4,034,627					$ 4,034,627
September 2023 [Member] \| Mortgages [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment, Principal						$ 35,673
Debt Instrument, Interest Rate, Stated Percentage	5.01%					5.01%
July 2026 [Member] \| Mortgages [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment, Principal						$ 91,675
Debt Instrument, Interest Rate, Stated Percentage	6.27%					6.27%
October 29 [Member] \| Mortgages [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.32%					3.32%
Minimum [Member] \| Unsecured Debt [Member] \| 2023 Term Loan [Member] \| LIBOR
Debt Instrument [Line Items]
Spread on variable rate				0.85%
Minimum [Member] \| Unsecured Debt [Member] \| 2024 Term Loan Facilities [Member] \| LIBOR
Debt Instrument [Line Items]
Spread on variable rate						0.85%
Minimum [Member] \| Unsecured Debt [Member] \| 2026 Term Loan [Member] \| LIBOR
Debt Instrument [Line Items]
Spread on variable rate	1.45%
Minimum [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Credit facility fee (as a percent)						0.00%
Minimum [Member] \| Revolving Credit Facility [Member] \| LIBOR
Debt Instrument [Line Items]
Spread on variable rate						0.85%
Maximum [Member]
Debt Instrument [Line Items]
Reimbursement Agreement, Amount												$ 14,000,000
Maximum [Member] \| Unsecured Debt [Member] \| 2023 Term Loan [Member] \| LIBOR
Debt Instrument [Line Items]
Spread on variable rate				1.65%
Maximum [Member] \| Unsecured Debt [Member] \| 2024 Term Loan Facility One [Member] \| LIBOR
Debt Instrument [Line Items]
Spread on variable rate						1.65%
Maximum [Member] \| Unsecured Debt [Member] \| 2026 Term Loan [Member] \| LIBOR
Debt Instrument [Line Items]
Spread on variable rate	2.40%
Maximum [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Credit facility fee (as a percent)						0.55%
Maximum [Member] \| Revolving Credit Facility [Member] \| LIBOR
Debt Instrument [Line Items]
Spread on variable rate						1.55%