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Discontinued Operations and Divestitures (Discontinued Operations) - Additional Information (Detail) - Office	1 Months Ended	3 Months Ended	9 Months Ended
	Dec. 31, 2014	Sep. 30, 2015	Sep. 30, 2015
Discontinued Operations and Disposal Groups [Abstract]
Discontinued Operations, Number of Operations Sold	2	2	2

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- Definition

"Discontinued operations number of operations sold.

+ References

No definition available.

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- References

No definition available.

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