Fair Value Of Financial Instruments (Schedule Of Fair Value Assets Measured On A Recurring Basis) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended					3 Months Ended		12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Sep. 30, 2012	Dec. 31, 2012 Significant Other Observable Inputs (Level 2) [Member]	Sep. 30, 2012 Significant Other Observable Inputs (Level 2) [Member]	Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member]		Sep. 30, 2012 Significant Unobservable Inputs (Level 3) [Member]		Dec. 31, 2012 GSE Debentures [Member]	Sep. 30, 2012 GSE Debentures [Member]	Dec. 31, 2012 GSE Debentures [Member] Significant Other Observable Inputs (Level 2) [Member]	Sep. 30, 2012 GSE Debentures [Member] Significant Other Observable Inputs (Level 2) [Member]	Dec. 31, 2012 Municipal Bonds [Member]	Sep. 30, 2012 Municipal Bonds [Member]	Dec. 31, 2012 Municipal Bonds [Member] Significant Other Observable Inputs (Level 2) [Member]	Sep. 30, 2012 Municipal Bonds [Member] Significant Other Observable Inputs (Level 2) [Member]	Dec. 31, 2012 Trust Preferred Securities [Member]	Sep. 30, 2012 Trust Preferred Securities [Member]	Dec. 31, 2012 Trust Preferred Securities [Member] Significant Unobservable Inputs (Level 3) [Member]		Sep. 30, 2012 Trust Preferred Securities [Member] Significant Unobservable Inputs (Level 3) [Member]		Dec. 31, 2012 MBS [Member]	Sep. 30, 2012 MBS [Member]	Dec. 31, 2012 MBS [Member] Significant Other Observable Inputs (Level 2) [Member]	Sep. 30, 2012 MBS [Member] Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale ("AFS") securities, carrying value	$ 1,259,392		$ 1,406,844	$ 1,256,928	$ 1,404,546	$ 2,464	[1]	$ 2,298	[2]	$ 765,529	$ 861,724	$ 765,529	$ 861,724	$ 1,380	$ 2,516	$ 1,380	$ 2,516	$ 2,464	$ 2,298	$ 2,464	[1]	$ 2,298	[2]	$ 490,019	$ 540,306	$ 490,019	$ 540,306
Proceeds from principal repayments	345,298	187,947				23		996
Reductions in net unrealized losses included in OCI						$ 111		$ 78

[1] The Company’s Level 3 AFS securities had no activity from September 30, 2012 to December 31, 2012, except for principal repayments of $23 thousand and reductions in net unrealized losses recognized in other comprehensive income.  Reductions in net unrealized losses included in other comprehensive income for the quarter ended December 31, 2012 were $111 thousand.

[2] The Company’s Level 3 AFS securities had no activity from September 30, 2011 to September 30, 2012, except for principal repayments of $996 thousand and reductions in net unrealized losses recognized in other comprehensive income. Reductions of net unrealized losses included in other comprehensive income for the year ended September 30, 2012 were $78 thousand.