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Note E - Allowance for Losses on Loans (Details) (USD $)	3 Months Ended			9 Months Ended
	Jun. 30, 2011		Jun. 30, 2010	Jun. 30, 2011		Jun. 30, 2010	Sep. 30, 2010	Mar. 31, 2010
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance	$ 163,617,000			$ 163,094,000
Charge-offs	(25,837,000)
Recoveries	2,319,000
Provisions & Transfers	21,000,000
Ending Allowance	161,099,000			161,099,000
Provision for loan losses	21,000,000		20,736,000	77,750,000		153,909,000
Financing Receivable, Allowance for Credit Losses	161,099,000			161,099,000
Loans receivable, gross	8,386,503,000			8,386,503,000			8,777,106,000
Nonaccrual loans by portfolio segment	232,752,000		292,335,000	232,752,000		292,335,000	245,532,000
Percentage Increase (Decrease) in Nonperforming Assets	20.40%			20.40%
Financing Receivable, Allowance for Credit Losses, Charge-offs, Net of Recoveries	23,519,000		41,862,000
Percentage Increase (Decrease) Loans Over 30 Days Delinquent	3.66%			3.66%				3.95%
Ratio of past due loans to total loans, net of charge-offs and LIPs				3.66%
Residential Portfolio Segment [Member] | Nonperforming Financing Receivable [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Nonaccrual loans by portfolio segment	129,798,000			129,798,000
Construction, Speculative [Member] | Nonperforming Financing Receivable [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Nonaccrual loans by portfolio segment	24,539,000			24,539,000
Construction, Custom [Member] | Nonperforming Financing Receivable [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Nonaccrual loans by portfolio segment	0			0
Land, Acquisition and Development [Member] | Nonperforming Financing Receivable [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Nonaccrual loans by portfolio segment	51,100,000			51,100,000
Land, Consumer Lot Loans [Member] | Nonperforming Financing Receivable [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Nonaccrual loans by portfolio segment	6,148,000			6,148,000
Multi Family Housing [Member] | Nonperforming Financing Receivable [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Nonaccrual loans by portfolio segment	7,850,000			7,850,000
Commercial Real Estate Portfolio Segment [Member] | Nonperforming Financing Receivable [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Nonaccrual loans by portfolio segment	12,186,000			12,186,000
Commercial and Industrial Loans [Member] | Nonperforming Financing Receivable [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Nonaccrual loans by portfolio segment	257,000			257,000
Home Equity Line of Credit [Member] | Nonperforming Financing Receivable [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Nonaccrual loans by portfolio segment	590,000			590,000
Consumer Portfolio Segment [Member] | Nonperforming Financing Receivable [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Nonaccrual loans by portfolio segment	284,000			284,000
Nonperforming Financing Receivable [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loans receivable, gross	394,679,000		473,121,000	394,679,000		473,121,000
Grade as Percentage of Total Gross Loans	2.96%		3.45%	2.96%		3.45%
Nonaccrual loans by portfolio segment	232,752,000			232,752,000
Residential Portfolio Segment [Member] | Loans Collectively Evaluated for Impairment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	70,755,000			70,755,000
Financing Receivable, Allowance for Credit Losses	70,755,000			70,755,000
Loans receivable, gross	6,265,274,000	[1]		6,265,274,000	[1]
Allowance as a Percentage of Outstanding Loans and Leases	1.10%			1.10%
Construction, Speculative [Member] | Loans Collectively Evaluated for Impairment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	15,069,000			15,069,000
Financing Receivable, Allowance for Credit Losses	15,069,000			15,069,000
Loans receivable, gross	98,464,000	[1]		98,464,000	[1]
Allowance as a Percentage of Outstanding Loans and Leases	15.30%			15.30%
Construction, Custom [Member] | Loans Collectively Evaluated for Impairment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	590,000			590,000
Financing Receivable, Allowance for Credit Losses	590,000			590,000
Loans receivable, gross	270,894,000	[1]		270,894,000	[1]
Allowance as a Percentage of Outstanding Loans and Leases	0.20%			0.20%
Land, Acquisition and Development [Member] | Loans Collectively Evaluated for Impairment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	6,196,000			6,196,000
Financing Receivable, Allowance for Credit Losses	6,196,000			6,196,000
Loans receivable, gross	53,351,000	[1]		53,351,000	[1]
Allowance as a Percentage of Outstanding Loans and Leases	11.60%			11.60%
Land, Consumer Lot Loans [Member] | Loans Collectively Evaluated for Impairment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	4,579,000			4,579,000
Financing Receivable, Allowance for Credit Losses	4,579,000			4,579,000
Loans receivable, gross	167,418,000	[1]		167,418,000	[1]
Allowance as a Percentage of Outstanding Loans and Leases	2.70%			2.70%
Multi Family Housing [Member] | Loans Collectively Evaluated for Impairment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	3,474,000			3,474,000
Financing Receivable, Allowance for Credit Losses	3,474,000			3,474,000
Loans receivable, gross	695,986,000	[1]		695,986,000	[1]
Allowance as a Percentage of Outstanding Loans and Leases	0.50%			0.50%
Commercial Real Estate Portfolio Segment [Member] | Loans Collectively Evaluated for Impairment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	2,690,000			2,690,000
Financing Receivable, Allowance for Credit Losses	2,690,000			2,690,000
Loans receivable, gross	268,519,000	[1]		268,519,000	[1]
Allowance as a Percentage of Outstanding Loans and Leases	1.00%			1.00%
Commercial and Industrial Loans [Member] | Loans Collectively Evaluated for Impairment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	4,844,000			4,844,000
Financing Receivable, Allowance for Credit Losses	4,844,000			4,844,000
Loans receivable, gross	77,884,000	[1]		77,884,000	[1]
Allowance as a Percentage of Outstanding Loans and Leases	6.20%			6.20%
Home Equity Line of Credit [Member] | Loans Collectively Evaluated for Impairment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	1,148,000			1,148,000
Financing Receivable, Allowance for Credit Losses	1,148,000			1,148,000
Loans receivable, gross	114,676,000	[1]		114,676,000	[1]
Allowance as a Percentage of Outstanding Loans and Leases	1.00%			1.00%
Consumer Portfolio Segment [Member] | Loans Collectively Evaluated for Impairment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	4,814,000			4,814,000
Financing Receivable, Allowance for Credit Losses	4,814,000			4,814,000
Loans receivable, gross	73,061,000	[1]		73,061,000	[1]
Allowance as a Percentage of Outstanding Loans and Leases	6.60%			6.60%
Loans Collectively Evaluated for Impairment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	114,159,000		89,759,000	114,159,000		89,759,000
Financing Receivable, Allowance for Credit Losses	114,159,000		89,759,000	114,159,000		89,759,000
Loans receivable, gross	8,085,527,000	[1]		8,085,527,000	[1]
Allowance as a Percentage of Outstanding Loans and Leases	1.40%			1.40%
Residential Portfolio Segment [Member] | Loans Individually Evaluated for Impairment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	3,806,000			3,806,000
Financing Receivable, Allowance for Credit Losses	3,806,000			3,806,000
Loans receivable, gross	15,798,000	[1]		15,798,000	[1]
Allowance as a Percentage of Outstanding Loans and Leases	24.10%			24.10%
Construction, Speculative [Member] | Loans Individually Evaluated for Impairment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	7,406,000			7,406,000
Financing Receivable, Allowance for Credit Losses	7,406,000			7,406,000
Loans receivable, gross	45,500,000	[1]		45,500,000	[1]
Allowance as a Percentage of Outstanding Loans and Leases	16.30%			16.30%
Construction, Custom [Member] | Loans Individually Evaluated for Impairment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	0			0
Financing Receivable, Allowance for Credit Losses	0			0
Loans receivable, gross	0	[1]		0	[1]
Allowance as a Percentage of Outstanding Loans and Leases	0.00%			0.00%
Land, Acquisition and Development [Member] | Loans Individually Evaluated for Impairment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	29,159,000			29,159,000
Financing Receivable, Allowance for Credit Losses	29,159,000			29,159,000
Loans receivable, gross	177,550,000	[1]		177,550,000	[1]
Allowance as a Percentage of Outstanding Loans and Leases	16.40%			16.40%
Land, Consumer Lot Loans [Member] | Loans Individually Evaluated for Impairment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	1,234,000			1,234,000
Financing Receivable, Allowance for Credit Losses	1,234,000			1,234,000
Loans receivable, gross	2,296,000	[1]		2,296,000	[1]
Allowance as a Percentage of Outstanding Loans and Leases	53.70%			53.70%
Multi Family Housing [Member] | Loans Individually Evaluated for Impairment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	3,455,000			3,455,000
Financing Receivable, Allowance for Credit Losses	3,455,000			3,455,000
Loans receivable, gross	21,121,000	[1]		21,121,000	[1]
Allowance as a Percentage of Outstanding Loans and Leases	16.40%			16.40%
Commercial Real Estate Portfolio Segment [Member] | Loans Individually Evaluated for Impairment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	1,661,000			1,661,000
Financing Receivable, Allowance for Credit Losses	1,661,000			1,661,000
Loans receivable, gross	34,504,000	[1]		34,504,000	[1]
Allowance as a Percentage of Outstanding Loans and Leases	4.80%			4.80%
Commercial and Industrial Loans [Member] | Loans Individually Evaluated for Impairment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	219,000			219,000
Financing Receivable, Allowance for Credit Losses	219,000			219,000
Loans receivable, gross	4,207,000	[1]		4,207,000	[1]
Allowance as a Percentage of Outstanding Loans and Leases	5.20%			5.20%
Home Equity Line of Credit [Member] | Loans Individually Evaluated for Impairment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	0			0
Financing Receivable, Allowance for Credit Losses	0			0
Loans receivable, gross	0	[1]		0	[1]
Allowance as a Percentage of Outstanding Loans and Leases	0.00%			0.00%
Consumer Portfolio Segment [Member] | Loans Individually Evaluated for Impairment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	0			0
Financing Receivable, Allowance for Credit Losses	0			0
Loans receivable, gross	0	[1]		0	[1]
Allowance as a Percentage of Outstanding Loans and Leases	0.00%			0.00%
Loans Individually Evaluated for Impairment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	46,940,000		83,668,000	46,940,000		83,668,000
Financing Receivable, Allowance for Credit Losses	46,940,000		83,668,000	46,940,000		83,668,000
Loans receivable, gross	300,976,000	[1]		300,976,000	[1]
Allowance as a Percentage of Outstanding Loans and Leases	15.60%			15.60%
Residential Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance	66,883,000
Charge-offs	(8,985,000)
Recoveries	969,000
Provisions & Transfers	15,694,000
Ending Allowance	74,561,000			74,561,000
Financing Receivable, Allowance for Credit Losses	74,561,000			74,561,000
Loans receivable, gross	6,281,072,000			6,281,072,000			6,551,837,000
Nonaccrual loans by portfolio segment	129,798,000			129,798,000			115,155,000
Ratio of past due loans to total loans, net of charge-offs and LIPs				3.43%		3.09%
Construction, Speculative [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance	21,536,000
Charge-offs	(733,000)
Recoveries	564,000
Provisions & Transfers	1,108,000
Ending Allowance	22,475,000			22,475,000
Financing Receivable, Allowance for Credit Losses	22,475,000			22,475,000
Loans receivable, gross	143,964,000			143,964,000			169,712,000
Nonaccrual loans by portfolio segment	24,539,000			24,539,000			39,915,000
Ratio of past due loans to total loans, net of charge-offs and LIPs				11.69%
Construction, Custom [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance	548,000
Charge-offs	(80,000)
Recoveries	0
Provisions & Transfers	122,000
Ending Allowance	590,000			590,000
Financing Receivable, Allowance for Credit Losses	590,000			590,000
Loans receivable, gross	270,894,000			270,894,000			256,384,000
Nonaccrual loans by portfolio segment	0			0			0
Ratio of past due loans to total loans, net of charge-offs and LIPs				0.43%
Land, Acquisition and Development [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance	44,648,000
Charge-offs	(12,027,000)
Recoveries	158,000
Provisions & Transfers	2,576,000
Ending Allowance	35,355,000			35,355,000
Financing Receivable, Allowance for Credit Losses	35,355,000			35,355,000
Loans receivable, gross	230,901,000			230,901,000			307,230,000
Nonaccrual loans by portfolio segment	51,100,000			51,100,000			64,883,000
Ratio of past due loans to total loans, net of charge-offs and LIPs				17.59%
Land, Consumer Lot Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance	5,675,000
Charge-offs	(1,169,000)
Recoveries	0
Provisions & Transfers	1,307,000
Ending Allowance	5,813,000			5,813,000
Financing Receivable, Allowance for Credit Losses	5,813,000			5,813,000
Loans receivable, gross	169,714,000			169,714,000			186,840,000
Nonaccrual loans by portfolio segment	6,148,000			6,148,000			7,540,000
Ratio of past due loans to total loans, net of charge-offs and LIPs				5.01%
Multi Family Housing [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance	8,007,000
Charge-offs	(1,100,000)
Recoveries	0
Provisions & Transfers	22,000
Ending Allowance	6,929,000			6,929,000
Financing Receivable, Allowance for Credit Losses	6,929,000			6,929,000
Loans receivable, gross	717,107,000			717,107,000			697,351,000
Nonaccrual loans by portfolio segment	7,850,000			7,850,000			4,931,000
Ratio of past due loans to total loans, net of charge-offs and LIPs				1.39%
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance	3,499,000
Charge-offs	(75,000)
Recoveries	53,000
Provisions & Transfers	874,000
Ending Allowance	4,351,000			4,351,000
Financing Receivable, Allowance for Credit Losses	4,351,000			4,351,000
Loans receivable, gross	303,023,000			303,023,000			315,915,000
Nonaccrual loans by portfolio segment	12,186,000			12,186,000			10,831,000
Ratio of past due loans to total loans, net of charge-offs and LIPs				3.46%
Commercial and Industrial Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance	6,406,000
Charge-offs	(189,000)
Recoveries	70,000
Provisions & Transfers	(1,224,000)
Ending Allowance	5,063,000			5,063,000
Financing Receivable, Allowance for Credit Losses	5,063,000			5,063,000
Loans receivable, gross	82,091,000			82,091,000			83,070,000
Nonaccrual loans by portfolio segment	257,000			257,000			371,000
Ratio of past due loans to total loans, net of charge-offs and LIPs				0.36%
Home Equity Line of Credit [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance	1,148,000
Charge-offs	(496,000)
Recoveries	110,000
Provisions & Transfers	386,000
Ending Allowance	1,148,000			1,148,000
Financing Receivable, Allowance for Credit Losses	1,148,000			1,148,000
Loans receivable, gross	114,676,000			114,676,000			116,143,000
Nonaccrual loans by portfolio segment	590,000			590,000			929,000
Ratio of past due loans to total loans, net of charge-offs and LIPs				0.94%
Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance	5,267,000
Charge-offs	(983,000)
Recoveries	395,000
Provisions & Transfers	135,000
Ending Allowance	4,814,000			4,814,000
Financing Receivable, Allowance for Credit Losses	4,814,000			4,814,000
Loans receivable, gross	73,061,000			73,061,000			92,624,000
Nonaccrual loans by portfolio segment	$ 284,000			$ 284,000			$ 977,000
Ratio of past due loans to total loans, net of charge-offs and LIPs				2.91%
[1] Excludes covered loan

X

- Definition

A valuation allowance for financing receivables that are expected to be uncollectible.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-URI http://asc.fasb.org/extlink&oid=6965416&loc=SL6953423-111524
-Subparagraph (c)(1)

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X

- Definition

Charge to expense for financing receivables that are expected to be uncollectible.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-URI http://asc.fasb.org/extlink&oid=6965416&loc=SL6953423-111524
-Subparagraph (c)(2)

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X

- Definition

Reduction to the allowance for credit losses related to collections on financing receivables which have been partially or fully charged off as bad debts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-URI http://asc.fasb.org/extlink&oid=6965416&loc=SL6953423-111524
-Subparagraph (c)(4)

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X

- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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X

- Definition

Reduction to the allowance for credit losses related to financing receivables deemed uncollectible.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-URI http://asc.fasb.org/extlink&oid=6965416&loc=SL6953423-111524
-Subparagraph (c)(3)

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X

- 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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X

- Definition

Reflects the carrying amount of loans deemed to be questionable as to collection on which no interest is continuing to be recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Statement of Position (SOP)
-Number 01-6
-Paragraph 13
-Subparagraph g
-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 50
-Paragraph 7
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6965416&loc=d3e5111-111524

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X

- Definition

The sum of the periodic provision charged to operations, based on an assessment of the uncollectibility of the loan and lease portfolio, the offset to which is either added to or deducted from the allowance account for the purpose of reducing loan receivable and leases to an amount that approximates their net realizable value (the amount expected to be collected).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.11)
-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 9
-Section 04
-Paragraph 11

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Audit and Accounting Guide (AAG)
-Number AAG-DEP
-Chapter 5
-Paragraph 168, 169, 170
-IssueDate 2006-05-01
-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 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585

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