Quarterly report pursuant to Section 13 or 15(d)

Shareholders' Equity (Details)

v3.2.0.727
Shareholders' Equity (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Jun. 30, 2015
Jun. 30, 2014
Feb. 07, 2014
Shareholders' Equity [Line Items]                  
Dividends per share (in dollars per share) $ 0.12       $ 0.12   $ 0.24 $ 0.24  
Stock Repurchase Program, Number of Shares Authorized to be Repurchased                 2,000,000
Stock Repurchase Program Number Of Shares Repurchased         446,986        
Stock Repurchased and Retired During Period, Value         $ 19,985,000   $ 0 $ 19,985,000  
Stock repurchased, common stock acquired, average cost per share         $ 44.71        
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased 1,118,021           1,118,021    
Common Stock [Member]                  
Shareholders' Equity [Line Items]                  
Dividends per share (in dollars per share) $ 0.12 $ 0.12 $ 0.12 $ 0.12 $ 0.12 $ 0.12