XML 12 R33.htm IDEA: XBRL DOCUMENT

Stock Repurchase Plan - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Apr. 30, 2012 Share Repurchase Program Two Thousand and Twelve [Member]	Mar. 31, 2013 Stock Repurchase Program 2012 [Member]
Sharere Purchases [Line Items]
Stock Repurchase Program, Number of Shares Authorized to be Repurchased		1,000,000
Remaining authorized funds for stock repurchase			690,333
Stock Repurchased During Period, Shares	21,224
Stock Repurchased During Period, Value	$ 0.3

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

+ References+ Details

- Definition

Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

+ References+ Details