Quarterly report pursuant to Section 13 or 15(d)

Shareholders' Equity (Details)

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Shareholders' Equity (Details) (USD $)
In Thousands, except Share data
1 Months Ended 3 Months Ended 9 Months Ended
Oct. 28, 2011
Sep. 30, 2011
Sep. 30, 2010
Sep. 30, 2011
Sep. 30, 2010
Shareholders' Equity [Abstract]          
Cash dividend declared per share of common stock (dollars in per shares)   $ 0.07 $ 0.07 $ 0.21 $ 0.21
Number of shares authorized to be repurchased (in shares)   2,000,000   2,000,000  
Number of shares repurchased (in shares) 69,039 904,729   904,729  
Repurchase of common stock $ 1,807 $ 24,294   $ 24,294 $ 0
Treasury Stock Acquired, Average Cost Per Share (in dollars per share) $ 26.17 $ 26.85   $ 26.85  
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased (in shares) 815,059 884,098   884,098