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Allowance for Losses on Loans (Internally Assigned Grade) (Details) (USD $)	Jun. 30, 2012	Sep. 30, 2011	Jun. 30, 2012 Pass [Member]	Sep. 30, 2011 Pass [Member]	Jun. 30, 2012 Special Mention [Member]	Sep. 30, 2011 Special Mention [Member]	Jun. 30, 2012 Substandard [Member]	Sep. 30, 2011 Substandard [Member]	Jun. 30, 2012 Doubtful [Member]	Sep. 30, 2011 Doubtful [Member]	Jun. 30, 2012 Loss [Member]	Sep. 30, 2011 Loss [Member]	Jun. 30, 2012 Nonperforming Financing Receivable [Member]	Jun. 30, 2011 Nonperforming Financing Receivable [Member]	Jun. 30, 2012 Residential Portfolio Segment [Member]	Sep. 30, 2011 Residential Portfolio Segment [Member]	Sep. 30, 2011 Residential Portfolio Segment [Member] Pass [Member]	Sep. 30, 2011 Residential Portfolio Segment [Member] Special Mention [Member]	Sep. 30, 2011 Residential Portfolio Segment [Member] Substandard [Member]	Sep. 30, 2011 Residential Portfolio Segment [Member] Doubtful [Member]	Sep. 30, 2011 Residential Portfolio Segment [Member] Loss [Member]	Jun. 30, 2012 Construction, Speculative [Member]	Sep. 30, 2011 Construction, Speculative [Member]	Sep. 30, 2011 Construction, Speculative [Member] Pass [Member]	Sep. 30, 2011 Construction, Speculative [Member] Special Mention [Member]	Sep. 30, 2011 Construction, Speculative [Member] Substandard [Member]	Sep. 30, 2011 Construction, Speculative [Member] Doubtful [Member]	Sep. 30, 2011 Construction, Speculative [Member] Loss [Member]	Jun. 30, 2012 Construction, Custom [Member]	Sep. 30, 2011 Construction, Custom [Member]	Sep. 30, 2011 Construction, Custom [Member] Pass [Member]	Sep. 30, 2011 Construction, Custom [Member] Special Mention [Member]	Sep. 30, 2011 Construction, Custom [Member] Substandard [Member]	Sep. 30, 2011 Construction, Custom [Member] Doubtful [Member]	Sep. 30, 2011 Construction, Custom [Member] Loss [Member]	Jun. 30, 2012 Land, Acquisition and Development [Member]	Sep. 30, 2011 Land, Acquisition and Development [Member]	Sep. 30, 2011 Land, Acquisition and Development [Member] Pass [Member]	Sep. 30, 2011 Land, Acquisition and Development [Member] Special Mention [Member]	Sep. 30, 2011 Land, Acquisition and Development [Member] Substandard [Member]	Sep. 30, 2011 Land, Acquisition and Development [Member] Doubtful [Member]	Sep. 30, 2011 Land, Acquisition and Development [Member] Loss [Member]	Jun. 30, 2012 Land, Consumer Lot Loans [Member]	Sep. 30, 2011 Land, Consumer Lot Loans [Member]	Sep. 30, 2011 Land, Consumer Lot Loans [Member] Pass [Member]	Sep. 30, 2011 Land, Consumer Lot Loans [Member] Special Mention [Member]	Sep. 30, 2011 Land, Consumer Lot Loans [Member] Substandard [Member]	Sep. 30, 2011 Land, Consumer Lot Loans [Member] Doubtful [Member]	Sep. 30, 2011 Land, Consumer Lot Loans [Member] Loss [Member]	Jun. 30, 2012 Multi Family Housing [Member]	Sep. 30, 2011 Multi Family Housing [Member]	Sep. 30, 2011 Multi Family Housing [Member] Pass [Member]	Sep. 30, 2011 Multi Family Housing [Member] Special Mention [Member]	Sep. 30, 2011 Multi Family Housing [Member] Substandard [Member]	Sep. 30, 2011 Multi Family Housing [Member] Doubtful [Member]	Sep. 30, 2011 Multi Family Housing [Member] Loss [Member]	Jun. 30, 2012 Commercial Real Estate Portfolio Segment [Member]	Sep. 30, 2011 Commercial Real Estate Portfolio Segment [Member]	Sep. 30, 2011 Commercial Real Estate Portfolio Segment [Member] Pass [Member]	Sep. 30, 2011 Commercial Real Estate Portfolio Segment [Member] Special Mention [Member]	Sep. 30, 2011 Commercial Real Estate Portfolio Segment [Member] Substandard [Member]	Sep. 30, 2011 Commercial Real Estate Portfolio Segment [Member] Doubtful [Member]	Sep. 30, 2011 Commercial Real Estate Portfolio Segment [Member] Loss [Member]	Jun. 30, 2012 Commercial and Industrial Loans [Member]	Sep. 30, 2011 Commercial and Industrial Loans [Member]	Sep. 30, 2011 Commercial and Industrial Loans [Member] Pass [Member]	Sep. 30, 2011 Commercial and Industrial Loans [Member] Special Mention [Member]	Sep. 30, 2011 Commercial and Industrial Loans [Member] Substandard [Member]	Sep. 30, 2011 Commercial and Industrial Loans [Member] Doubtful [Member]	Sep. 30, 2011 Commercial and Industrial Loans [Member] Loss [Member]	Jun. 30, 2012 Home Equity Line of Credit [Member]	Sep. 30, 2011 Home Equity Line of Credit [Member]	Sep. 30, 2011 Home Equity Line of Credit [Member] Pass [Member]	Sep. 30, 2011 Home Equity Line of Credit [Member] Special Mention [Member]	Sep. 30, 2011 Home Equity Line of Credit [Member] Substandard [Member]	Sep. 30, 2011 Home Equity Line of Credit [Member] Doubtful [Member]	Sep. 30, 2011 Home Equity Line of Credit [Member] Loss [Member]	Jun. 30, 2012 Consumer Portfolio Segment [Member]	Sep. 30, 2011 Consumer Portfolio Segment [Member]	Sep. 30, 2011 Consumer Portfolio Segment [Member] Pass [Member]	Sep. 30, 2011 Consumer Portfolio Segment [Member] Special Mention [Member]	Sep. 30, 2011 Consumer Portfolio Segment [Member] Substandard [Member]	Sep. 30, 2011 Consumer Portfolio Segment [Member] Doubtful [Member]	Sep. 30, 2011 Consumer Portfolio Segment [Member] Loss [Member]	Jun. 30, 2012 Non-Acquired Loans [Member]	Sep. 30, 2011 Non-Acquired Loans [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Pass [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Special Mention [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Substandard [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Doubtful [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Loss [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Residential Portfolio Segment [Member]	Sep. 30, 2011 Non-Acquired Loans [Member] Residential Portfolio Segment [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Residential Portfolio Segment [Member] Pass [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Residential Portfolio Segment [Member] Special Mention [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Residential Portfolio Segment [Member] Substandard [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Residential Portfolio Segment [Member] Doubtful [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Residential Portfolio Segment [Member] Loss [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Construction, Speculative [Member]	Sep. 30, 2011 Non-Acquired Loans [Member] Construction, Speculative [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Construction, Speculative [Member] Pass [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Construction, Speculative [Member] Special Mention [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Construction, Speculative [Member] Substandard [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Construction, Speculative [Member] Doubtful [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Construction, Speculative [Member] Loss [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Construction, Custom [Member]	Sep. 30, 2011 Non-Acquired Loans [Member] Construction, Custom [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Construction, Custom [Member] Pass [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Construction, Custom [Member] Special Mention [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Construction, Custom [Member] Substandard [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Construction, Custom [Member] Doubtful [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Construction, Custom [Member] Loss [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Land, Acquisition and Development [Member]	Sep. 30, 2011 Non-Acquired Loans [Member] Land, Acquisition and Development [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Land, Acquisition and Development [Member] Pass [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Land, Acquisition and Development [Member] Special Mention [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Land, Acquisition and Development [Member] Substandard [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Land, Acquisition and Development [Member] Doubtful [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Land, Acquisition and Development [Member] Loss [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Land, Consumer Lot Loans [Member]	Sep. 30, 2011 Non-Acquired Loans [Member] Land, Consumer Lot Loans [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Land, Consumer Lot Loans [Member] Pass [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Land, Consumer Lot Loans [Member] Special Mention [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Land, Consumer Lot Loans [Member] Substandard [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Land, Consumer Lot Loans [Member] Doubtful [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Land, Consumer Lot Loans [Member] Loss [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Multi Family Housing [Member]	Sep. 30, 2011 Non-Acquired Loans [Member] Multi Family Housing [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Multi Family Housing [Member] Pass [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Multi Family Housing [Member] Special Mention [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Multi Family Housing [Member] Substandard [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Multi Family Housing [Member] Doubtful [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Multi Family Housing [Member] Loss [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Commercial Real Estate Portfolio Segment [Member]	Sep. 30, 2011 Non-Acquired Loans [Member] Commercial Real Estate Portfolio Segment [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Commercial Real Estate Portfolio Segment [Member] Pass [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Commercial Real Estate Portfolio Segment [Member] Special Mention [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Commercial Real Estate Portfolio Segment [Member] Substandard [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Commercial Real Estate Portfolio Segment [Member] Doubtful [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Commercial Real Estate Portfolio Segment [Member] Loss [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Commercial and Industrial Loans [Member]	Sep. 30, 2011 Non-Acquired Loans [Member] Commercial and Industrial Loans [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Commercial and Industrial Loans [Member] Pass [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Commercial and Industrial Loans [Member] Special Mention [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Commercial and Industrial Loans [Member] Substandard [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Commercial and Industrial Loans [Member] Doubtful [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Commercial and Industrial Loans [Member] Loss [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Home Equity Line of Credit [Member]	Sep. 30, 2011 Non-Acquired Loans [Member] Home Equity Line of Credit [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Home Equity Line of Credit [Member] Pass [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Home Equity Line of Credit [Member] Special Mention [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Home Equity Line of Credit [Member] Substandard [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Home Equity Line of Credit [Member] Doubtful [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Home Equity Line of Credit [Member] Loss [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Consumer Portfolio Segment [Member]	Sep. 30, 2011 Non-Acquired Loans [Member] Consumer Portfolio Segment [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Consumer Portfolio Segment [Member] Pass [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Consumer Portfolio Segment [Member] Special Mention [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Consumer Portfolio Segment [Member] Substandard [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Consumer Portfolio Segment [Member] Doubtful [Member]	Jun. 30, 2012 Non-Acquired Loans [Member] Consumer Portfolio Segment [Member] Loss [Member]	Jun. 30, 2012 Acquired Credit Impaired Loans [Member]	Jun. 30, 2012 Acquired Credit Impaired Loans [Member] Pass [Member]	Jun. 30, 2012 Acquired Credit Impaired Loans [Member] Special Mention [Member]	Jun. 30, 2012 Acquired Credit Impaired Loans [Member] Substandard [Member]	Jun. 30, 2012 Acquired Credit Impaired Loans [Member] Doubtful [Member]	Jun. 30, 2012 Acquired Credit Impaired Loans [Member] Loss [Member]	Jun. 30, 2012 Acquired Credit Impaired Loans [Member] Residential Portfolio Segment [Member]	Jun. 30, 2012 Acquired Credit Impaired Loans [Member] Residential Portfolio Segment [Member] Pass [Member]	Jun. 30, 2012 Acquired Credit Impaired Loans [Member] Residential Portfolio Segment [Member] Special Mention [Member]	Jun. 30, 2012 Acquired Credit Impaired Loans [Member] Residential Portfolio Segment [Member] Substandard [Member]	Jun. 30, 2012 Acquired Credit Impaired Loans [Member] Residential Portfolio Segment [Member] Doubtful [Member]	Jun. 30, 2012 Acquired Credit Impaired Loans [Member] Residential Portfolio Segment [Member] Loss [Member]	Jun. 30, 2012 Acquired Credit Impaired Loans [Member] Construction, Speculative [Member]	Jun. 30, 2012 Acquired Credit Impaired Loans [Member] Construction, Speculative [Member] Pass [Member]	Jun. 30, 2012 Acquired Credit Impaired Loans [Member] Construction, Speculative [Member] Special Mention [Member]	Jun. 30, 2012 Acquired Credit Impaired Loans [Member] Construction, Speculative [Member] Substandard [Member]	Jun. 30, 2012 Acquired Credit Impaired Loans [Member] Construction, Speculative [Member] Doubtful [Member]	Jun. 30, 2012 Acquired Credit Impaired Loans [Member] Construction, Speculative [Member] Loss [Member]	Jun. 30, 2012 Acquired Credit Impaired Loans [Member] Multi Family Housing [Member]	Jun. 30, 2012 Acquired Credit Impaired Loans [Member] Multi Family Housing [Member] Pass [Member]	Jun. 30, 2012 Acquired Credit Impaired Loans [Member] Multi Family Housing [Member] Special Mention [Member]	Jun. 30, 2012 Acquired Credit Impaired Loans [Member] Multi Family Housing [Member] Substandard [Member]	Jun. 30, 2012 Acquired Credit Impaired Loans [Member] Multi Family Housing [Member] Doubtful [Member]	Jun. 30, 2012 Acquired Credit Impaired Loans [Member] Multi Family Housing [Member] Loss [Member]	Jun. 30, 2012 Acquired Credit Impaired Loans [Member] Commercial Real Estate Portfolio Segment [Member]	Jun. 30, 2012 Acquired Credit Impaired Loans [Member] Commercial Real Estate Portfolio Segment [Member] Pass [Member]	Jun. 30, 2012 Acquired Credit Impaired Loans [Member] Commercial Real Estate Portfolio Segment [Member] Special Mention [Member]	Jun. 30, 2012 Acquired Credit Impaired Loans [Member] Commercial Real Estate Portfolio Segment [Member] Substandard [Member]	Jun. 30, 2012 Acquired Credit Impaired Loans [Member] Commercial Real Estate Portfolio Segment [Member] Doubtful [Member]	Jun. 30, 2012 Acquired Credit Impaired Loans [Member] Commercial Real Estate Portfolio Segment [Member] Loss [Member]	Jun. 30, 2012 Acquired Credit Impaired Loans [Member] Commercial and Industrial Loans [Member]	Jun. 30, 2012 Acquired Credit Impaired Loans [Member] Commercial and Industrial Loans [Member] Pass [Member]	Jun. 30, 2012 Acquired Credit Impaired Loans [Member] Commercial and Industrial Loans [Member] Special Mention [Member]	Jun. 30, 2012 Acquired Credit Impaired Loans [Member] Commercial and Industrial Loans [Member] Substandard [Member]	Jun. 30, 2012 Acquired Credit Impaired Loans [Member] Commercial and Industrial Loans [Member] Doubtful [Member]	Jun. 30, 2012 Acquired Credit Impaired Loans [Member] Commercial and Industrial Loans [Member] Loss [Member]	Jun. 30, 2012 Acquired Credit Impaired Loans [Member] Home Equity Line of Credit [Member]	Jun. 30, 2012 Acquired Credit Impaired Loans [Member] Home Equity Line of Credit [Member] Pass [Member]	Jun. 30, 2012 Acquired Credit Impaired Loans [Member] Home Equity Line of Credit [Member] Special Mention [Member]	Jun. 30, 2012 Acquired Credit Impaired Loans [Member] Home Equity Line of Credit [Member] Substandard [Member]	Jun. 30, 2012 Acquired Credit Impaired Loans [Member] Home Equity Line of Credit [Member] Doubtful [Member]	Jun. 30, 2012 Acquired Credit Impaired Loans [Member] Home Equity Line of Credit [Member] Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	$ 7,979,019,000	$ 8,299,074,000	$ 7,525,212,000	$ 7,804,613,000	$ 48,645,000	$ 76,285,000	$ 403,725,000	$ 415,550,000	$ 1,437,000	$ 2,245,000	$ 0	$ 381,000	$ 278,490,000	$ 394,679,000	$ 5,905,148,000	$ 6,218,878,000	$ 6,047,279,000	$ 0	$ 171,599,000	$ 0	$ 0	$ 132,630,000	$ 140,459,000	$ 56,485,000	$ 21,035,000	$ 62,939,000	$ 0	$ 0	$ 210,488,000	$ 279,851,000	$ 279,851,000	$ 0	$ 0	$ 0	$ 0	$ 139,603,000	$ 200,692,000	$ 44,888,000	$ 44,840,000	$ 110,964,000	$ 0	$ 0	$ 145,129,000	$ 163,146,000	$ 162,670,000	$ 0	$ 476,000	$ 0	$ 0	$ 693,837,000	$ 700,673,000	$ 663,582,000	$ 4,629,000	$ 32,462,000	$ 0	$ 0	$ 401,594,000	$ 303,442,000	$ 264,083,000	$ 4,125,000	$ 35,234,000	$ 0	$ 0	$ 153,677,000	$ 109,332,000	$ 104,171,000	$ 1,128,000	$ 1,407,000	$ 2,245,000	$ 381,000	$ 128,596,000	$ 115,092,000	$ 115,092,000	$ 0	$ 0	$ 0	$ 0	$ 68,317,000	$ 67,509,000	$ 66,512,000	$ 528,000	$ 469,000	$ 0	$ 0	$ 7,860,244,000	$ 8,299,074,000	$ 7,452,433,000	$ 42,347,000	$ 365,464,000	$ 0	$ 0	$ 5,904,805,000	$ 6,218,878,000	$ 5,714,905,000	$ 299,000	$ 189,601,000	$ 0	$ 0	$ 130,741,000	$ 140,459,000	$ 80,542,000	$ 6,695,000	$ 43,504,000	$ 0	$ 0	$ 210,488,000	$ 279,851,000	$ 210,488,000	$ 0	$ 0	$ 0	$ 0	$ 135,392,000	$ 200,692,000	$ 42,907,000	$ 21,935,000	$ 70,550,000	$ 0	$ 0	$ 145,129,000	$ 163,146,000	$ 144,658,000	$ 356,000	$ 115,000	$ 0	$ 0	$ 692,763,000	$ 700,673,000	$ 660,948,000	$ 7,574,000	$ 24,241,000	$ 0	$ 0	$ 310,588,000	$ 303,442,000	$ 271,050,000	$ 4,608,000	$ 34,930,000	$ 0	$ 0	$ 148,577,000	$ 109,332,000	$ 146,075,000	$ 352,000	$ 2,150,000	$ 0	$ 0	$ 113,559,000	$ 115,092,000	$ 113,559,000	$ 0	$ 0	$ 0	$ 0	$ 68,202,000	$ 67,509,000	$ 67,301,000	$ 528,000	$ 373,000	$ 0	$ 0	$ 118,775,000	$ 72,779,000	$ 6,298,000	$ 38,261,000	$ 1,437,000	$ 0	$ 343,000	$ 343,000	$ 0	$ 0	$ 0	$ 0	$ 6,101,000	$ 2,514,000	$ 0	$ 3,587,000	$ 0	$ 0	$ 1,074,000	$ 0	$ 0	$ 1,074,000	$ 0	$ 0	$ 91,006,000	$ 52,223,000	$ 5,493,000	$ 32,257,000	$ 1,033,000	$ 0	$ 5,100,000	$ 2,548,000	$ 805,000	$ 1,343,000	$ 404,000	$ 0	$ 15,151,000	$ 15,151,000	$ 0	$ 0	$ 0	$ 0
Grade as percentage of total gross loans			94.30%	94.10%	0.60%	0.90%	5.10%	5.00%	0.00%	0.00%	0.00%	0.00%	2.07%	2.96%

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- Definition

Reflects the aggregate gross carrying amount of all categories of loans and leases held in portfolio, prior to deducting deferred income and the allowance for losses on loans and leases.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Statement of Position (SOP)

-Number 01-6

-Paragraph 13

-Subparagraph e

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6375948&loc=d3e4428-111522

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- Definition

Grade as Percentage of Total Gross Loans

+ References

No definition available.

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