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Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Sep. 30, 2012
Accounting Policies [Abstract]  
Schedule of goodwill and intangible assets
The balance of the Company's intangible assets was as follows, which includes the additional goodwill discussed above:

 
Goodwill
 
Servicing Rights Intangible
 
Core Deposit Intangible
 
Total
 
(In thousands)
 
 
 
 
 
 
 
 
Balance at September 30, 2010
$
251,653

 
$
1,775

 
$
4,290

 
$
257,718

Additions
—

 
—

 
—

 
—

Amortization
—

 
(529
)
 
(918
)
 
(1,447
)
Balance at September 30, 2011
251,653

 
1,246

 
3,372

 
256,271

Additions
—

 
—

 
2,022

 
2,022

Amortization
—

 
(960
)
 
(1,257
)
 
(2,217
)
Balance at September 30, 2012
$
251,653

 
$
286

 
$
4,137

 
$
256,076
Schedule of future amortization expense
The table below presents the estimated core deposit intangible asset amortization expense for the next five years:
Year End
 
Expense
 
 
(In thousands)
2013
 
$
1,314

2014
 
1,314

2015
 
1,014

2016
 
396

2017
 
99