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Changes in Receivable from FDIC (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Changes in the receivable from the FDIC
Beginning balance	$ 30,908	$ 40,389	$ 34,691	$ 48,149
(Decrease) increase in estimated losses on covered loans	(110)	812	(451)	812
Increase in estimated losses on covered OREO	674	3,654	1,233	3,752
Reimbursable expenses from the FDIC	88	327	375	818
Net amortization	(1,096)	(1,089)	(3,166)	(4,290)
Reimbursements from the FDIC	(719)	(6,991)	(2,937)	(12,139)
Ending balance	$ 29,745	$ 37,102	$ 29,745	$ 37,102

X

- Definition

FDIC indemnification reimbursable expenses accrued.

+ References

No definition available.

+ Details

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X

- Definition

Carrying amount of receivable assets originating from the indemnification agreement with the Federal Deposit Insurance Corporation (FDIC), in which the FDIC is to partially cover losses.

+ References

No definition available.

+ Details

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X

- Definition

Amount of decreases to the indemnification asset due to cash payments received relating to loss sharing agreements with the Federal Deposit Insurance Corporation (FDIC).

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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X

- Definition

Amount of decreases to the indemnification asset due to write offs of loans, net of recoveries, relating to loss sharing agreements with the Federal Deposit Insurance Corporation (FDIC).

+ References

No definition available.

+ Details

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X

- Definition

The increase (decrease) in the allowance for credit losses related to financing receivables.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 11B

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524

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X

- Definition

Total Increase or Decrease in the real estate owned valuation allowance for period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.10(4))

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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