Stock Repurchase Program - Additional Information (Detail) (USD $)	9 Months Ended	1 Months Ended
Nov. 01, 2014	Dec. 11, 2014 Subsequent Event [Member]	May 22, 2014 Maximum [Member]
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, Authorized amount	$ 26,100,000		$ 30,000,000
Stock repurchase program, Expiration date	May 31, 2016
Repurchase and retirement of common stock, shares	227,062	20,000
Repurchase and retirement of common stock	3,933,000	356,000
Stock repurchase program, remaining authorized repurchase amount	$ 26,100,000

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Number of shares that have been repurchased and retired during the period.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29, 30

-Article 5

+ Details

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- Definition

Equity impact of the value of stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital).

+ References

+ Details

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- Definition

Amount of stock repurchase plan authorized.

+ References

No definition available.

+ Details

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- Definition

Expiration date for the purchase of an entity's own shares under a stock repurchase plan, in the CCYY-MM-DD format.

+ References

No definition available.

+ Details

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- Definition

Amount remaining of a stock repurchase plan authorized.

+ References

No definition available.

+ Details

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