Quarterly report pursuant to Section 13 or 15(d)

Shareholders' Equity (Details)

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Shareholders' Equity (Details) (USD $)
3 Months Ended 6 Months Ended 0 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Jul. 24, 2012
Dividend Declared [Member]
Stockholders' Equity Note [Abstract]          
Number of shares authorized to be repurchased (in shares) 2,000,000   2,000,000    
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased (in shares) 815,059   815,059    
Shareholders' Equity [Line Items]          
Dividends per share (in dollars per share) $ 0.07 $ 0.07 $ 0.14 $ 0.14 $ 0.10