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Derivatives (Derivatives) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2017 USD ($)
Derivative [Line Items]
Notional amount	$ 59,700
Fair value	$ 722
Interest Rate Swaps, Maturing August 4, 2021 [Member]
Derivative [Line Items]
Maturity date	Aug. 04, 2021
Notional amount	$ 10,300
Interest rate paid (in hundredths)	1.12%
Interest rate received (in hundredths)	1.31%
Fair value	$ 306
Interest Rate Swaps, Maturing August 17, 2025 1 [Member]
Derivative [Line Items]
Maturity date	Aug. 17, 2025
Notional amount	$ 2,500
Interest rate paid (in hundredths)	2.27%
Interest rate received (in hundredths)	1.31%
Fair value	$ (15)
Interest Rate Swaps, Maturing August 17, 2025 2 [Member]
Derivative [Line Items]
Maturity date	Aug. 17, 2025
Notional amount	$ 2,500
Interest rate paid (in hundredths)	2.27%
Interest rate received (in hundredths)	1.31%
Fair value	$ (15)
Interest Rate Swaps, Maturing December 11, 2025 [Member]
Derivative [Line Items]
Maturity date	Dec. 11, 2025
Notional amount	$ 2,400
Interest rate paid (in hundredths)	2.14%
Interest rate received (in hundredths)	1.32%
Fair value	$ 13
Interest Rate Swaps, Maturing December 23, 2025 [Member]
Derivative [Line Items]
Maturity date	Dec. 23, 2025
Notional amount	$ 6,800
Interest rate paid (in hundredths)	2.16%
Interest rate received (in hundredths)	1.33%
Fair value	$ 27
Interest Rate Swaps, Maturing December 24, 2025 [Member]
Derivative [Line Items]
Maturity date	Dec. 24, 2025
Notional amount	$ 8,200
Interest rate paid (in hundredths)	2.17%
Interest rate received (in hundredths)	1.33%
Fair value	$ 22
Interest Rate Swaps, Maturing January 28, 2026 [Member]
Derivative [Line Items]
Maturity date	Jan. 28, 2026
Notional amount	$ 3,000
Interest rate paid (in hundredths)	1.87%
Interest rate received (in hundredths)	1.31%
Fair value	$ 79
Interest Rate Swaps, Maturing July 20, 2026 [Member]
Derivative [Line Items]
Maturity date	Jul. 20, 2026
Notional amount	$ 6,300
Interest rate paid (in hundredths)	1.44%
Interest rate received (in hundredths)	1.31%
Fair value	$ 405
Interest Rate Swaps, Maturing December 12, 2026 [Member]
Derivative [Line Items]
Maturity date	Dec. 12, 2026
Notional amount	$ 3,200
Interest rate paid (in hundredths)	2.26%
Interest rate received (in hundredths)	1.31%
Fair value	$ (2)
Interest Rate Swaps, Maturing January 4, 2027 [Member]
Derivative [Line Items]
Maturity date	Jan. 04, 2027
Notional amount	$ 10,100
Interest rate paid (in hundredths)	2.35%
Interest rate received (in hundredths)	1.30%
Fair value	$ (79)
Interest Rate Swaps, Maturing April 27, 2027 [Member]
Derivative [Line Items]
Maturity date	Apr. 27, 2027
Notional amount	$ 4,400
Interest rate paid (in hundredths)	2.32%
Interest rate received (in hundredths)	1.32%
Fair value	$ (19)

X

- 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

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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=77997519&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=77997519&loc=d3e13495-108611

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- Definition

Fixed interest rate related to the interest rate derivative.

+ References

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- Definition

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