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Fair Value - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2013
Securities
Fair Value [Line Items]
Number Of Securities Continuous Unrealized Loss Position More Than Twelve Months	3
Securities | Corporate Trust Preferred
Fair Value [Line Items]
Fair value inputs recovery rate	0.00%
Number Of Pooled Trust Preferred Securities	1
Loan | Fair Value, Inputs, Level 3
Fair Value [Line Items]
Number of impaired assets	18
Property | Fair Value, Inputs, Level 2
Fair Value [Line Items]
Number Of Other Real Estate Owned Assets	3

X

- Definition

Fair Value Inputs, Recovery Rate.

+ References

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- Details

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X

- Definition

Number of impaired assets.

+ References

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+ Details

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- Definition

Number Of Other Real Estate Owned Assets.

+ References

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- Definition

Number of Pooled Trust Preferred Securities.

+ References

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X

- Definition

Number Of Securities Continuous Unrealized Loss Position More Than Twelve Months.

+ References

No definition available.

+ Details

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