Annual report pursuant to Section 13 and 15(d)

Shareholders' Equity (Details)

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Shareholders' Equity (Details) (USD $)
In Millions, except Share data, unless otherwise specified
1 Months Ended 12 Months Ended
Sep. 27, 2011
Dec. 31, 2011
Shareholders' Equity [Abstract]    
Number of rights per outstanding share declared   1
Percentage of common stock to be acquired for exercise of the rights   15.00%
Discount on market price common stock for purchase of rights   50.00%
Shares authorized under share repurchase program 10,000,000  
Outstanding common shares acquired   791,000
Outstanding common stock acquired, value   $ 28.1
Outstanding common stock acquired, average price   $ 35.46
Cash dividend per common share $ 0.125  
Dividend payment date Nov. 16, 2011  
Record date Nov. 02, 2011