Fair Value Information - Assets and Liabilities Measured at Fair Value on Non-Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011
Description of Assets
Investment securities-HTM		$ (656)
Covered loans held-for-sale		(250)
Impaired loans- non-covered	(3,930)	(6,707)
OREO- non-covered	(336)	(523)
OREO- covered	(467)	(2,192)
Level 1 [Member]
Description of Assets
Investment securities-HTM
Covered loans held-for-sale
Impaired loans- non-covered
OREO- non-covered
OREO- covered
Level 2 [Member]
Description of Assets
Investment securities-HTM
Covered loans held-for-sale
Impaired loans- non-covered
OREO- non-covered
OREO- covered
Level 3 [Member]
Description of Assets
Investment securities-HTM		2,383
Covered loans held-for-sale		1,404
Impaired loans- non-covered	12,460	30,014
OREO- non-covered	3,008	4,866
OREO- covered	1,067	2,541
Carrying Value [Member]
Description of Assets
Investment securities-HTM		2,383
Covered loans held-for-sale		1,404
Impaired loans- non-covered	12,460	30,014
OREO- non-covered	3,008	4,866
OREO- covered	$ 1,067	$ 2,541

- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents investments in debt securities which are categorized as held-to-maturity and that have scheduled maturities more than one year from the balance sheet date or operating cycle, if longer; such investments are normally measured at amortized cost (carrying value) unless circumstances indicate that the value to be recovered from the investment is less than its carried amount. The held-to-maturity category is for those securities that the Company has the positive intent and ability to hold until maturity.

+ References+ Details