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Changes in Receivable from FDIC (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Changes in the receivable from the FDIC
Beginning balance	$ 34,691	$ 48,149
Decrease in estimated losses on covered loans	(203)
Increase in estimated losses on covered OREO	149	1,338
Reimbursable expenses from the FDIC	150	341
Net amortization	(1,134)	(1,539)
Reimbursements from the FDIC	(1,143)	(4,368)
Ending balance	$ 32,510	$ 43,921

X

- Definition

FDIC indemnification reimbursable expenses accrued.

+ References

No definition available.

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Period Type:	duration

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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Balance Type:	credit
Period Type:	duration

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.

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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=28368275&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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