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Restricted Stock Units Issued (Detail) - 6 months ended Jun. 30, 2015 - Restricted Stock Units (RSUs) - $ / shares	Total
Restricted Stock Units
Beginning Restricted Stock Units	23,576
Restricted Stock Units Granted	0
Dividend Equivalents Earned	486
Restricted Stock Units Settled	0
Ending Restricted Stock Units	24,062
Weighted-Average Stock Price
Beginning Restricted Stock Units	$ 29.90
Restricted Stock Units Granted	0
Dividend Equivalents Earned	34.12
Restricted Stock Units Settled	0
Ending Restricted Stock Units	$ 29.98

X

- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 718



-SubTopic 10



-Section 50



-Paragraph 2



-Subparagraph (c)(2)(iii)(1)



-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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