Quarterly report pursuant to Section 13 or 15(d)

Stock Repurchase Programs (Details)

v2.4.1.9
Stock Repurchase Programs (Details) (USD $)
Share data in Millions, unless otherwise specified
6 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Jun. 30, 2014
Stock Repurchase Programs      
Stock repurchase programs, authorized amount     $ 275,000,000us-gaap_StockRepurchaseProgramAuthorizedAmount1
Common shares repurchased 0.8us-gaap_StockRepurchasedDuringPeriodShares 0.8us-gaap_StockRepurchasedDuringPeriodShares  
Common shares repurchased, cost 30,618,000us-gaap_StockRepurchasedDuringPeriodValue 35,480,000us-gaap_StockRepurchasedDuringPeriodValue  
Amount remaining available for future stock repurchases $ 104,600,000us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1