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Debt (Schedule of Interest Rate Derivatives) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($)
Interest Rate Swap, Date Entered, May 2012 [Member]
Derivative [Line Items]
Derivative, Inception Date	May 31, 2012
Derivative, Fixed Interest Rate	2.84%
Debt Instrument, Description of Variable Rate Basis	1-month LIBOR
Derivative, Notional Amount	$ 40,000
Derivative, Maturity Date	Apr. 30, 2019
Derivative Asset, Fair Value, Gross Asset	$ 130
Interest Rate Swap, Date Entered, June 2013 [Member]
Derivative [Line Items]
Derivative, Inception Date	Jun. 30, 2013
Derivative, Fixed Interest Rate	3.41%
Debt Instrument, Description of Variable Rate Basis	1-month LIBOR
Derivative, Notional Amount	$ 80,000
Derivative, Maturity Date	Jun. 30, 2020
Derivative Asset, Fair Value, Gross Asset	$ 480
Interest Rate Swap, Date Entered, March 2014 [Member]
Derivative [Line Items]
Derivative, Inception Date	Mar. 31, 2014
Derivative, Fixed Interest Rate	3.46%
Debt Instrument, Description of Variable Rate Basis	1-month LIBOR
Derivative, Notional Amount	$ 130,000
Derivative, Maturity Date	Jun. 30, 2020
Derivative Asset, Fair Value, Gross Asset	$ 687

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

+ Details

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X

- Definition

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.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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X

- Definition

Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226000-175313

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 20
-Section 50
-Paragraph 4D
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=109247956&loc=SL51823488-111719

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-Subparagraph (a),(c)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959

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X

- Definition

Fixed interest rate related to the interest rate derivative.

+ References

No definition available.

+ Details

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X

- Definition

Date the entity entered into the derivative contract, in CCYY-MM-DD format.

+ References

No definition available.

+ Details

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- Definition

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.

+ References

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- Definition

Date the derivative contract matures, in CCYY-MM-DD format.

+ References

No definition available.

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