Covered Assets (Aging Analysis of Non-Credit Impaired Loans) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Sep. 30, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding principal balance of acquired loans	$ 212,002	$ 300,610
Acquired Non Impaired Assets [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding principal balance of acquired loans	124,687	166,636
Loans and Leases Receivable, Covered Loans, Current	122,032	159,195
Loans and Leases Receivable, Covered Loans, 30 Days	207	2,963
Loans and Leases Receivable, Covered Loans, 60 Days	26	529
Loans and Leases Receivable, Covered Assets, 90 Days	2,422	3,949
Loans and Leases Receivable, Covered Assets, Past Due	2,655	7,441
Loans and Leases Receivable, Covered Loans, Ratio of Total Past Due Loans to Total Loans Receivable, Net of Charge Offs and Loans in Process	2.13%	4.47%
Acquired Non Impaired Assets [Member] | Residential Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding principal balance of acquired loans	24,468	28,460
Loans and Leases Receivable, Covered Loans, Current	23,056	27,411
Loans and Leases Receivable, Covered Loans, 30 Days	108	78
Loans and Leases Receivable, Covered Loans, 60 Days	13	0
Loans and Leases Receivable, Covered Assets, 90 Days	1,291	971
Loans and Leases Receivable, Covered Assets, Past Due	1,412	1,049
Loans and Leases Receivable, Covered Loans, Ratio of Total Past Due Loans to Total Loans Receivable, Net of Charge Offs and Loans in Process	5.77%	3.69%
Acquired Non Impaired Assets [Member] | Construction - Speculative [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding principal balance of acquired loans	0	0
Loans and Leases Receivable, Covered Loans, Current	0	0
Loans and Leases Receivable, Covered Loans, 30 Days	0	0
Loans and Leases Receivable, Covered Loans, 60 Days	0	0
Loans and Leases Receivable, Covered Assets, 90 Days	0	0
Loans and Leases Receivable, Covered Assets, Past Due	0	0
Loans and Leases Receivable, Covered Loans, Ratio of Total Past Due Loans to Total Loans Receivable, Net of Charge Offs and Loans in Process	0.00%	0.00%
Acquired Non Impaired Assets [Member] | Construction - Custom [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding principal balance of acquired loans	0	0
Loans and Leases Receivable, Covered Loans, Current	0	0
Loans and Leases Receivable, Covered Loans, 30 Days	0	0
Loans and Leases Receivable, Covered Loans, 60 Days	0	0
Loans and Leases Receivable, Covered Assets, 90 Days	0	0
Loans and Leases Receivable, Covered Assets, Past Due	0	0
Loans and Leases Receivable, Covered Loans, Ratio of Total Past Due Loans to Total Loans Receivable, Net of Charge Offs and Loans in Process	0.00%	0.00%
Acquired Non Impaired Assets [Member] | Land - Acquisition & Development [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding principal balance of acquired loans	1,836	4,810
Loans and Leases Receivable, Covered Loans, Current	1,800	4,774
Loans and Leases Receivable, Covered Loans, 30 Days	0	0
Loans and Leases Receivable, Covered Loans, 60 Days	0	0
Loans and Leases Receivable, Covered Assets, 90 Days	36	36
Loans and Leases Receivable, Covered Assets, Past Due	36	36
Loans and Leases Receivable, Covered Loans, Ratio of Total Past Due Loans to Total Loans Receivable, Net of Charge Offs and Loans in Process	1.96%	0.75%
Acquired Non Impaired Assets [Member] | Land - Consumer Lot Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding principal balance of acquired loans	74	245
Loans and Leases Receivable, Covered Loans, Current	74	199
Loans and Leases Receivable, Covered Loans, 30 Days	0	0
Loans and Leases Receivable, Covered Loans, 60 Days	0	0
Loans and Leases Receivable, Covered Assets, 90 Days	0	46
Loans and Leases Receivable, Covered Assets, Past Due	0	46
Loans and Leases Receivable, Covered Loans, Ratio of Total Past Due Loans to Total Loans Receivable, Net of Charge Offs and Loans in Process	0.00%	18.78%
Acquired Non Impaired Assets [Member] | Multi-Family [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding principal balance of acquired loans	16,472	18,852
Loans and Leases Receivable, Covered Loans, Current	16,472	17,511
Loans and Leases Receivable, Covered Loans, 30 Days	0	0
Loans and Leases Receivable, Covered Loans, 60 Days	0	0
Loans and Leases Receivable, Covered Assets, 90 Days	0	1,341
Loans and Leases Receivable, Covered Assets, Past Due	0	1,341
Loans and Leases Receivable, Covered Loans, Ratio of Total Past Due Loans to Total Loans Receivable, Net of Charge Offs and Loans in Process	0.00%	7.11%
Acquired Non Impaired Assets [Member] | Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding principal balance of acquired loans	63,032	89,499
Loans and Leases Receivable, Covered Loans, Current	61,937	84,949
Loans and Leases Receivable, Covered Loans, 30 Days	0	2,779
Loans and Leases Receivable, Covered Loans, 60 Days	0	455
Loans and Leases Receivable, Covered Assets, 90 Days	1,095	1,316
Loans and Leases Receivable, Covered Assets, Past Due	1,095	4,550
Loans and Leases Receivable, Covered Loans, Ratio of Total Past Due Loans to Total Loans Receivable, Net of Charge Offs and Loans in Process	1.74%	5.08%
Acquired Non Impaired Assets [Member] | Commercial & Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding principal balance of acquired loans	5,579	9,416
Loans and Leases Receivable, Covered Loans, Current	5,579	9,416
Loans and Leases Receivable, Covered Loans, 30 Days	0	0
Loans and Leases Receivable, Covered Loans, 60 Days	0	0
Loans and Leases Receivable, Covered Assets, 90 Days	0	0
Loans and Leases Receivable, Covered Assets, Past Due	0	0
Loans and Leases Receivable, Covered Loans, Ratio of Total Past Due Loans to Total Loans Receivable, Net of Charge Offs and Loans in Process	0.00%	0.00%
Acquired Non Impaired Assets [Member] | HELOC [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding principal balance of acquired loans	12,725	14,750
Loans and Leases Receivable, Covered Loans, Current	12,628	14,334
Loans and Leases Receivable, Covered Loans, 30 Days	97	103
Loans and Leases Receivable, Covered Loans, 60 Days	0	74
Loans and Leases Receivable, Covered Assets, 90 Days	0	239
Loans and Leases Receivable, Covered Assets, Past Due	97	416
Loans and Leases Receivable, Covered Loans, Ratio of Total Past Due Loans to Total Loans Receivable, Net of Charge Offs and Loans in Process	0.76%	2.82%
Acquired Non Impaired Assets [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding principal balance of acquired loans	501	604
Loans and Leases Receivable, Covered Loans, Current	486	601
Loans and Leases Receivable, Covered Loans, 30 Days	2	3
Loans and Leases Receivable, Covered Loans, 60 Days	13	0
Loans and Leases Receivable, Covered Assets, 90 Days	0	0
Loans and Leases Receivable, Covered Assets, Past Due	$ 15	$ 3
Loans and Leases Receivable, Covered Loans, Ratio of Total Past Due Loans to Total Loans Receivable, Net of Charge Offs and Loans in Process	2.99%	0.50%