Debt (Richmond Credit Facility Narrative) (Details) - Richmond Credit Facility [Member]	19 Months Ended
Dec. 31, 2015 USD ($)
Debt Instrument [Line Items]
Credit facility, maturity date	Jun. 30, 2019
Increased borrowing capacity after considering accordion feature	$ 200,000,000
Current revolving credit facility	$ 120,000,000
Maximum [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Leverage ratio	2.85%
Minimum [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Leverage ratio	2.10%

Increased borrowing capacity after considering accordion feature.

No definition available.

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- Definition

Leverage Ratio Limit Under Existing Revolving Credit Facility

+ 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

No definition available.

+ Details

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- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ 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 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 19, 22
-Article 5

+ Details

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- Definition

Date the credit facility terminates, in CCYY-MM-DD format.

+ References

+ Details

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