Subsequent Events (Details) - Subsequent Event	1 Months Ended
Oct. 31, 2018 USD ($) increase loan_segment
Credit Agreement
Subsequent Event [Line Items]
Accordion feature to increase borrowing capacity	$ 50,000,000.0
Minimum increase in borrowing capacity	$ 15,000,000.0
Maximum number of increases \| increase	3
Interest coverage ratio covenant	300.00%
Maximum debt-to-capitalization coverage ratio covenant	30.00%
Maximum debt-to-appraised value of collateral covenant	50.00%
Credit Agreement Due September 2019
Subsequent Event [Line Items]
Fixed-rate loan segments	$ 9,800,000.0
Fixed interest rate	6.40%
Credit Agreement Due October 2024
Subsequent Event [Line Items]
Fixed-rate loan segments	$ 6,000,000.0
Credit Agreement Due October 2024 \| London Interbank Offered Rate (LIBOR)
Subsequent Event [Line Items]
Basis spread on variable rate	1.60%
Credit Agreement Due July 2025
Subsequent Event [Line Items]
Fixed-rate loan segments	$ 10,000,000.0
Fixed interest rate	6.05%
Credit Agreement Due July 2026
Subsequent Event [Line Items]
Fixed-rate loan segments	$ 11,000,000.0
Fixed interest rate	3.89%
Credit Agreement Due July 2028
Subsequent Event [Line Items]
Fixed-rate loan segments	$ 11,000,000.0
Fixed interest rate	4.13%
Credit Agreement Due October 2034
Subsequent Event [Line Items]
Fixed-rate loan segments	$ 8,000,000.0
Fixed interest rate	5.34%
Credit Agreement Due October 2035
Subsequent Event [Line Items]
Fixed-rate loan segments	$ 8,000,000.0
Fixed interest rate	5.34%
Credit Agreement Due October 2036
Subsequent Event [Line Items]
Fixed-rate loan segments	$ 8,000,000.0
Fixed interest rate	5.42%
Revolving Credit Facility \| Credit Agreement
Subsequent Event [Line Items]
Line of credit facility, maximum borrowing capacity	$ 30,000,000.0
Line of credit outstanding	$ 15,700,000
Revolving Credit Facility \| Credit Agreement \| London Interbank Offered Rate (LIBOR)
Subsequent Event [Line Items]
Basis spread on variable rate	1.60%
Delayed-Draw Facility \| Credit Agreement
Subsequent Event [Line Items]
Line of credit facility, maximum borrowing capacity	$ 40,000,000.0
Debt drawn	4,000,000
Fixed-rate loan segment, minimum	$ 5,000,000.0
Maximum number of fixed rate loan segments outstanding \| loan_segment	5
Delayed-Draw Facility \| Credit Agreement \| London Interbank Offered Rate (LIBOR)
Subsequent Event [Line Items]
Basis spread on variable rate	1.60%
Facility \| Credit Agreement
Subsequent Event [Line Items]
Line of credit facility, maximum borrowing capacity	$ 71,800,000.0
Minimum \| Delayed-Draw Facility \| Credit Agreement
Subsequent Event [Line Items]
Debt term	1 year
Maximum \| Delayed-Draw Facility \| Credit Agreement
Subsequent Event [Line Items]
Debt term	10 years
Maturities up to five years \| Credit Agreement
Subsequent Event [Line Items]
Maximum interest margin	2.20%
Maturities up to five years \| Fixed Rate Loan Segment \| Lender's Rate Pricing Index
Subsequent Event [Line Items]
Basis spread on variable rate	1.60%
Maturities up to five years \| Delayed-Draw Facility \| Credit Agreement \| Lender's Rate Pricing Index
Subsequent Event [Line Items]
Basis spread on variable rate	1.60%
Maturities greater than five years \| Credit Agreement
Subsequent Event [Line Items]
Maximum interest margin	2.25%
Maturities greater than five years \| Fixed Rate Loan Segment \| Lender's Rate Pricing Index
Subsequent Event [Line Items]
Basis spread on variable rate	1.65%
Maturities greater than five years \| Delayed-Draw Facility \| Credit Agreement \| Lender's Rate Pricing Index
Subsequent Event [Line Items]
Basis spread on variable rate	1.65%
Maturities between 1 and 10 years \| Minimum \| Variable Rate Loan Segment
Subsequent Event [Line Items]
Debt term	1 year
Maturities between 1 and 10 years \| Maximum \| Variable Rate Loan Segment
Subsequent Event [Line Items]
Debt term	10 years
Maturities at 12 years \| Variable Rate Loan Segment
Subsequent Event [Line Items]
Debt term	12 years
Maturities at 15 years \| Variable Rate Loan Segment
Subsequent Event [Line Items]
Debt term	15 years
Maturities at 18 years \| Variable Rate Loan Segment
Subsequent Event [Line Items]
Debt term	18 years

Debt Instrument, Covenant, Debt Service Coverage Ratio

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- Definition

Debt Instrument, Covenant, Interest Rate Coverage Ratio

+ References

No definition available.

+ Details

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- Definition

Debt Instrument, Covenant, Maximum Debt To Appraised Value Of Collateral Ratio

+ References

No definition available.

+ Details

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- Definition

Debt Instrument, Covenant, Maximum Interest Rate Margin

+ References

No definition available.

+ Details

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- Definition

Line Of Credit Facility, Accordion Feature, Increase Limit

+ References

No definition available.

+ Details

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- Definition

Line Of Credit Facility, Minimum Increase In Borrowing Capacity

+ References

No definition available.

+ Details

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- Definition

Line Of Credit Facility, Minimum Increase In Borrowing Capacity, Maximum Number Of Increases

+ References

No definition available.

+ Details

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- Definition

Long Term Debt, Minimum Fixed Rate Loan Segment, Amount

+ References

No definition available.

+ Details

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- Definition

Maximum Number of Fixed Rate Loan Segments Outstanding

+ References

No definition available.

+ Details

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- Definition

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

+ 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://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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+ Details

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- Definition

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.

+ References

+ Details

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- Definition

The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate.

+ References

+ Details

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- Definition

Period between issuance and maturity of long-term debt, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258

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- Definition

The portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate.

+ References

No definition available.

+ Details

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Period Type:	instant

- Definition

The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3255-108585

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- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

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