Equity and Earnings Per Share (Computation Of Basic And Diluted Earnings Per Common Share) (Details) (USD $)	3 Months Ended		12 Months Ended	3 Months Ended	5 Months Ended	12 Months Ended		3 Months Ended	12 Months Ended	15 Months Ended		1 Months Ended	3 Months Ended	1 Months Ended	3 Months Ended	1 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Jun. 30, 2014	Dec. 31, 2014 FiscalYear2014StockRepurchasePlan [Member] [Member]	Oct. 31, 2014 FiscalYear2014StockRepurchasePlan [Member] [Member]	Jun. 30, 2014 FiscalYear2014StockRepurchasePlan [Member] [Member]	Jun. 02, 2014 FiscalYear2014StockRepurchasePlan [Member] [Member]	Sep. 30, 2013 FiscalYear2013StockRepurchasePlan [Member]	Jun. 30, 2013 FiscalYear2013StockRepurchasePlan [Member]	Sep. 30, 2013 FiscalYear2013StockRepurchasePlan [Member]	Aug. 01, 2013 FiscalYear2013StockRepurchasePlan [Member]	Mar. 31, 2013 March 2013 Accelerated Share Repurchase [Member]	Sep. 30, 2013 March 2013 Accelerated Share Repurchase [Member]	Mar. 31, 2013 March Open Market Repurchases [Member]	Sep. 30, 2013 March Open Market Repurchases [Member]	Sep. 30, 2012 September 2012 Accelerated Share Repurchase [Member]	Sep. 30, 2012 September Open Market Repurchases [Member]
Class of Stock [Line Items]
Preferred Stock, Shares Authorized	5,000,000		5,000,000
Preferred Stock, Par or Stated Value Per Share	$ 0.01		$ 0.01
Preferred Stock, Shares Outstanding	0		0
Common Stock, Shares Authorized	150,000,000		150,000,000
Common Stock, Par or Stated Value Per Share	$ 0.01		$ 0.01
Common Stock, Shares, Outstanding	54,981,283		54,661,877
Disclosure of Repurchase Agreements [Abstract]
Stock Repurchase Program Authorized Amount							$ 150,000,000				$ 200,000,000
Treasury Stock, Shares, Acquired				345,165	2,630,009	2,284,844				5,458,285			101,247		51,071
Treasury Stock, Value, Acquired, Cost Method						150,000,000		2,400,000	197,600,000	200,000,000		50,000,000		50,000,000		50,000,000	50,000,000
Treasury Stock, Value, Acquired, Average Cost Per Share										$ 36.64
PercentOfSharesReceivedUnderASR			80.00%
Accelerated Share Repurchases, Initial Price Paid Per Share					$ 57.03	$ 52.52
Earnings Per Share, Basic and Diluted, Other Disclosures [Abstract]
Net income attributable to common stock	$ 37,142,000	$ 25,954,000
Weighted average number of shares outstanding, used in computing basic earnings per share	54,739,000	56,254,000
Dilutive common stock equivalents	1,023,000	1,141,000
Weighted average number of shares outstanding used in computing diluted earnings per share	55,762,000	57,395,000
Basic earnings per share	$ 0.68	$ 0.46
Diluted earnings per share	$ 0.67	$ 0.45
Anti-dilutive options (excluded from the calculation of diluted earnings per share)	417,000	95,000