FAIR VALUE MEASUREMENTS (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Assets and financial liabilities measured at fair value on a recurring basis
Available-for-sale securities:	$ 467,444	$ 419,756
Municipal bonds and obligations
Assets and financial liabilities measured at fair value on a recurring basis
Available-for-sale securities:	82,336	77,854
Government guaranteed residential mortgage-backed securities
Assets and financial liabilities measured at fair value on a recurring basis
Available-for-sale securities:	44,947	45,096
Government-sponsored residential mortgage-backed securities
Assets and financial liabilities measured at fair value on a recurring basis
Available-for-sale securities:	280,012	247,611
Corporate bonds
Assets and financial liabilities measured at fair value on a recurring basis
Available-for-sale securities:	9,703	9,727
Trust preferred securities
Assets and financial liabilities measured at fair value on a recurring basis
Available-for-sale securities:	19,069	17,815
Other bonds and obligations
Assets and financial liabilities measured at fair value on a recurring basis
Available-for-sale securities:	292	644
Marketable equity securities
Assets and financial liabilities measured at fair value on a recurring basis
Available-for-sale securities:	31,085	21,009
Level 1 Inputs
Assets and financial liabilities measured at fair value on a recurring basis
Available-for-sale securities:	31,085
Derivative liabilities	4,669
Level 2 Inputs
Assets and financial liabilities measured at fair value on a recurring basis
Available-for-sale securities:	435,542
Loans held for sale, fair value	114,698
Derivative assets	15,747
Derivative liabilities	32,244
Level 3 Inputs
Assets and financial liabilities measured at fair value on a recurring basis
Trading account security	17,237
Available-for-sale securities:	817
Derivative assets	7,832
Level 3 Inputs \| Trust preferred securities
Assets and financial liabilities measured at fair value on a recurring basis
Available-for-sale securities:	800
Recurring basis \| Level 1 Inputs
Assets and financial liabilities measured at fair value on a recurring basis
Derivative liabilities	4,669
Recurring basis \| Level 1 Inputs \| Marketable equity securities
Assets and financial liabilities measured at fair value on a recurring basis
Available-for-sale securities:	31,085	21,009
Recurring basis \| Level 2 Inputs
Assets and financial liabilities measured at fair value on a recurring basis
Loans held for sale, fair value	114,698
Derivative assets	15,747	13,926
Derivative liabilities	32,244	26,864
Recurring basis \| Level 2 Inputs \| Municipal bonds and obligations
Assets and financial liabilities measured at fair value on a recurring basis
Available-for-sale securities:	82,336	77,854
Recurring basis \| Level 2 Inputs \| Government guaranteed residential mortgage-backed securities
Assets and financial liabilities measured at fair value on a recurring basis
Available-for-sale securities:	44,947	45,096
Recurring basis \| Level 2 Inputs \| Government-sponsored residential mortgage-backed securities
Assets and financial liabilities measured at fair value on a recurring basis
Available-for-sale securities:	280,012	247,611
Recurring basis \| Level 2 Inputs \| Corporate bonds
Assets and financial liabilities measured at fair value on a recurring basis
Available-for-sale securities:	9,703	9,727
Recurring basis \| Level 2 Inputs \| Trust preferred securities
Assets and financial liabilities measured at fair value on a recurring basis
Available-for-sale securities:	18,252	17,271
Recurring basis \| Level 2 Inputs \| Other bonds and obligations
Assets and financial liabilities measured at fair value on a recurring basis
Available-for-sale securities:	292	644
Recurring basis \| Level 3 Inputs
Assets and financial liabilities measured at fair value on a recurring basis
Trading account security	17,237	17,395
Derivative assets	7,833
Derivative liabilities		66
Recurring basis \| Level 3 Inputs \| Trust preferred securities
Assets and financial liabilities measured at fair value on a recurring basis
Available-for-sale securities:	817	544
Recurring basis \| Total Fair Value
Assets and financial liabilities measured at fair value on a recurring basis
Trading account security	17,237	17,395
Loans held for sale, fair value	114,698
Derivative assets	23,580	13,926
Derivative liabilities	36,913	26,930
Recurring basis \| Total Fair Value \| Municipal bonds and obligations
Assets and financial liabilities measured at fair value on a recurring basis
Available-for-sale securities:	82,336	77,854
Recurring basis \| Total Fair Value \| Government guaranteed residential mortgage-backed securities
Assets and financial liabilities measured at fair value on a recurring basis
Available-for-sale securities:	44,947	45,096
Recurring basis \| Total Fair Value \| Government-sponsored residential mortgage-backed securities
Assets and financial liabilities measured at fair value on a recurring basis
Available-for-sale securities:	280,012	247,611
Recurring basis \| Total Fair Value \| Corporate bonds
Assets and financial liabilities measured at fair value on a recurring basis
Available-for-sale securities:	9,703	9,727
Recurring basis \| Total Fair Value \| Trust preferred securities
Assets and financial liabilities measured at fair value on a recurring basis
Available-for-sale securities:	19,069	17,815
Recurring basis \| Total Fair Value \| Other bonds and obligations
Assets and financial liabilities measured at fair value on a recurring basis
Available-for-sale securities:	292	644
Recurring basis \| Total Fair Value \| Marketable equity securities
Assets and financial liabilities measured at fair value on a recurring basis
Available-for-sale securities:	$ 31,085	$ 21,009

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 Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale.

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Fair value of derivative asset, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position.

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- Definition

Fair value of derivative liability, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position.

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- 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 Trading Securities which consist of all investments in certain debt and equity securities that are bought and held principally for the purpose of selling them in the near term (thus held for only a short period of time) or for which an entity has elected the fair value option. Trading generally reflects active and frequent buying and selling, and trading securities are generally used with the objective of generating profits on short-term differences in price, but this category of investments may also include items which are not intended to be sold in the near term or for which the fair value option has been elected.

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