XML 19 R57.htm IDEA: XBRL DOCUMENT v3.2.0.727
Treasury Stock Acquisition (Detail) - 6 months ended Jun. 30, 2015 - USD ($)
$ in Thousands
Total
Schedule of Treasury Stock [Line Items]  
Treasury stock acquired, Shares, Beginning balance 42,818,585
Treasury stock acquired, Shares, Ending balance 43,207,240
Treasury stock acquired, Values, Beginning balance $ 899,035
Treasury stock acquired, Values 8,010
Treasury stock acquired, Values, Ending balance $ 907,045
2013 Program  
Schedule of Treasury Stock [Line Items]  
Treasury stock acquired, Shares 8,618
Treasury stock acquired, Values $ 180
Long Term Incentive Plan  
Schedule of Treasury Stock [Line Items]  
Treasury stock acquired, Shares 380,037
Treasury stock acquired, Values $ 7,830