Fair value of the amount outstanding under the credit facility.

Reference 1: 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=35750535&loc=d3e13433-108611

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 12

-URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13476-108611

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- Definition

The effective interest rate during the reporting period.

+ 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

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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.

+ References

No definition available.

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- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

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Namespace Prefix:	us-gaap_
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- Definition

Represents the amount of the term note available borrowing upon tender offer effective date.

+ References

No definition available.

+ Details

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- Definition

Represents the debt instrument term from the effective date of the amendment as part of the tender offer.

+ References

No definition available.

+ Details

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- Definition

Represents the leverage ratio amendment term as part of the tender offer.

+ References

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- Definition

Represents the proposed maximum line of credit under the tender offer.

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Debt (Details) - USD ($) $ in Millions			1 Months Ended	6 Months Ended
Debt (Details) - USD ($) $ in Millions	Apr. 14, 2015	Apr. 13, 2015	Apr. 30, 2015	Jun. 27, 2015
Line of Credit Facility [Line Items]
Leverage ratio amendment term			2 years
Private Bank, Trust Company and BMO Harris Bank N A [Member]
Line of Credit Facility [Line Items]
Proposed maximum line of credit as part of tender offer	$ 60.0	$ 35.0
Debt instrument term from the effective date of the amendment			4 years
Amount of term note available borrowing upon tender offer effective date			$ 30.0
Borrowings outstanding				$ 49.1
Line of credit available for additional borrowings				$ 10.9
Minimum \| Private Bank, Trust Company and BMO Harris Bank N A [Member]
Line of Credit Facility [Line Items]
Interest rate				2.44%
Maximum \| Private Bank, Trust Company and BMO Harris Bank N A [Member]
Line of Credit Facility [Line Items]
Interest rate				3.25%