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Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Sep. 30, 2013
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, 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

Additions
8,624

 
—

 
1,433

 
10,057

Amortization
—

 
(286
)
 
(1,529
)
 
(1,815
)
Balance at September 30, 2013
$
260,277

 
$
—

 
$
4,041

 
$
264,318
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)
2014
 
$
1,600

2015
 
1,301

2016
 
682

2017
 
386

2018
 
72