Quarterly report pursuant to Section 13 or 15(d)

Stock Repurchase Program (Narrative) (Details)

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Stock Repurchase Program (Narrative) (Details) - shares
3 Months Ended 107 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2015
Jan. 17, 2007
Stock Repurchase Program [Abstract]        
Number of shares authorized to be repurchased 3,000,000   3,000,000 1,000,000
Stock repurchased during period, shares 0 0 2,183,704  
Maximum repurchases allowed under provision through calendar year 450,000      
Maximum repurchases allowed under provision annually per individual 50,000      
Maximum number of shares that may yet be purchased under the program 816,296   816,296