XML 72 R59.htm IDEA: XBRL DOCUMENT v2.4.0.6
Shareholders' Equity (Share Repurchases, Narrative) (Details) (USD $)
 12 Months Ended 3 Months Ended 12 Months Ended 1 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Apr. 30, 2010
Shares Repurchase, Settlement of Tax Liabilities Related to the Exercise of Stock Options
Dec. 31, 2012
Shares Repurchase, All, Except Settlement of Tax Liabilities Related to Exercise of Stock Options
Dec. 31, 2011
Shares Repurchase, All, Except Settlement of Tax Liabilities Related to Exercise of Stock Options
Dec. 31, 2010
Shares Repurchase, All, Except Settlement of Tax Liabilities Related to Exercise of Stock Options
Apr. 30, 2012
Share Repurchase Program Authorized in 2010
Jan. 31, 2011
Share Repurchase Program Authorized in 2010
May 31, 2010
Share Repurchase Program Authorized in 2010
Jan. 31, 2013
Share Repurchase Program Authorized in 2010
Repurchase of Equity
Equity, Class of Treasury Stock [Line Items]                      
Repurchase of common shares, shares       163,022 1,268,809 743,073 452,433        
Repurchase of common shares, value $ 8,086,594 $ 4,247,440 $ 4,887,247 $ 1,900,000 $ 8,100,000 $ 4,200,000 $ 3,000,000        
Share repurchase program, number of shares authorized to be repurchased                   10,000,000  
Share repurchase program, additional authorized amount replacing prior authorizations               $ 10,000,000 $ 10,000,000   $ 10,000,000