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Debt (Details) - USD ($) $ in Millions			1 Months Ended	9 Months Ended
	Apr. 14, 2015	Apr. 13, 2015	Apr. 30, 2015	Sep. 26, 2015
Line of Credit
Leverage ratio amendment term			2 years
Private Bank, Trust Company and BMO Harris Bank N A
Line of Credit
Proposed maximum line of credit as part of tender offer	$ 60.0	$ 35.0
Debt instrument term from the effective date of the amendment			2 years
Amount of term note available borrowing upon tender offer effective date			$ 30.0
Borrowings outstanding				$ 46.2
Line of credit available for additional borrowings				$ 13.8
Minimum | Private Bank, Trust Company and BMO Harris Bank N A
Line of Credit
Interest rate				2.46%
Maximum | Private Bank, Trust Company and BMO Harris Bank N A
Line of Credit
Interest rate				3.25%

X

- Definition

Fair value of the amount outstanding under the credit facility.

+ References

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=49121117&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=49121117&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))



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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

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

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- Definition

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

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

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