FAIR VALUE MEASUREMENTS (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012		Dec. 31, 2011
Assets
Trading securities			$ 8,240
Significant Unobservable Inputs (Level 3) [Member] | Private mortgage-backed securities [Member]
Assets
Assets	3,532
Significant Unobservable Inputs (Level 3) [Member] | Impaired Loans [Member]
Assets
Assets nonrecurring	7,817	[1]
Significant Unobservable Inputs (Level 3) [Member] | Other Real Estate Owned [Member]
Assets
Assets nonrecurring	11,974	[1]
Recurring [Member] | Balance [Member]
Assets
Trading securities			8,240
Liabilities
Total recurring fair value measurements	361,208		315,506
Recurring [Member] | Balance [Member] | Derivative instruments [Member]
Liabilities
Liabilities	46,793		44,407
Recurring [Member] | Balance [Member] | U.S. government agency securities [Member]
Assets
Securities available for sale	20,822
Recurring [Member] | Balance [Member] | Agency mortgage-backed securities [Member]
Assets
Securities available for sale	221,425		238,391
Recurring [Member] | Balance [Member] | Agency collateralized mortgage obligations [Member]
Assets
Securities available for sale	68,376		53,801
Recurring [Member] | Balance [Member] | Private mortgage-backed securities [Member]
Assets
Securities available for sale	3,532		6,110
Recurring [Member] | Balance [Member] | Single issuer trust preferred securities Issued by banks and insurers [Member]
Assets
Securities available for sale	2,240		4,210
Recurring [Member] | Balance [Member] | Pooled trust preferred securities issued by banks and insurers [Member]
Assets
Securities available for sale	2,981		2,820
Recurring [Member] | Balance [Member] | Marketable securities [Member]
Assets
Securities available for sale	9,910
Recurring [Member] | Balance [Member] | Loans held for sale [Member]
Assets
Assets	48,187		20,500
Recurring [Member] | Balance [Member] | Derivative instruments [Member]
Assets
Assets	30,528		25,841
Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Assets
Trading securities			8,240
Liabilities
Total recurring fair value measurements	9,910		8,240
Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Derivative instruments [Member]
Liabilities
Liabilities
Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | U.S. government agency securities [Member]
Assets
Securities available for sale
Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Agency mortgage-backed securities [Member]
Assets
Securities available for sale
Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Agency collateralized mortgage obligations [Member]
Assets
Securities available for sale
Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Private mortgage-backed securities [Member]
Assets
Securities available for sale
Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Single issuer trust preferred securities Issued by banks and insurers [Member]
Assets
Securities available for sale
Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Pooled trust preferred securities issued by banks and insurers [Member]
Assets
Securities available for sale
Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Marketable securities [Member]
Assets
Securities available for sale	9,910
Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Loans held for sale [Member]
Assets
Assets
Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Derivative instruments [Member]
Assets
Assets
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Assets
Trading securities
Liabilities
Total recurring fair value measurements	344,785		294,126
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Derivative instruments [Member]
Liabilities
Liabilities	46,793		44,407
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | U.S. government agency securities [Member]
Assets
Securities available for sale	20,822
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Agency mortgage-backed securities [Member]
Assets
Securities available for sale	221,425		238,391
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Agency collateralized mortgage obligations [Member]
Assets
Securities available for sale	68,376		53,801
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Private mortgage-backed securities [Member]
Assets
Securities available for sale
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Single issuer trust preferred securities Issued by banks and insurers [Member]
Assets
Securities available for sale	2,240
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Pooled trust preferred securities issued by banks and insurers [Member]
Assets
Securities available for sale
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Marketable securities [Member]
Assets
Securities available for sale
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Loans held for sale [Member]
Assets
Assets	48,187		20,500
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Derivative instruments [Member]
Assets
Assets	30,528		25,841
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Assets
Trading securities
Liabilities
Total recurring fair value measurements	6,513		13,140
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Derivative instruments [Member]
Liabilities
Liabilities
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | U.S. government agency securities [Member]
Assets
Securities available for sale
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Agency mortgage-backed securities [Member]
Assets
Securities available for sale
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Agency collateralized mortgage obligations [Member]
Assets
Securities available for sale
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Private mortgage-backed securities [Member]
Assets
Securities available for sale	3,532		6,110
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Single issuer trust preferred securities Issued by banks and insurers [Member]
Assets
Securities available for sale			4,210
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Pooled trust preferred securities issued by banks and insurers [Member]
Assets
Securities available for sale	2,981		2,820
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Marketable securities [Member]
Assets
Securities available for sale
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Loans held for sale [Member]
Assets
Assets
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Derivative instruments [Member]
Assets
Assets
Nonrecurring [Member] | Balance [Member]
Assets
Assets nonrecurring	19,791		43,519
Nonrecurring [Member] | Balance [Member] | Impaired Loans [Member]
Assets
Assets nonrecurring			36,861	[2]
Nonrecurring [Member] | Balance [Member] | Collateral Dependent Impaired Loans [Member]
Assets
Assets nonrecurring	7,817		9,000	[2]
Nonrecurring [Member] | Balance [Member] | Other Real Estate Owned [Member]
Assets
Assets nonrecurring	11,974		6,658
Nonrecurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Assets
Assets nonrecurring
Nonrecurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Impaired Loans [Member]
Assets
Assets nonrecurring				[2]
Nonrecurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Collateral Dependent Impaired Loans [Member]
Assets
Assets nonrecurring
Nonrecurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Other Real Estate Owned [Member]
Assets
Assets nonrecurring
Nonrecurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Assets
Assets nonrecurring
Nonrecurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Impaired Loans [Member]
Assets
Assets nonrecurring				[2]
Nonrecurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Collateral Dependent Impaired Loans [Member]
Assets
Assets nonrecurring
Nonrecurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Other Real Estate Owned [Member]
Assets
Assets nonrecurring
Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Assets
Assets nonrecurring	19,791		43,519
Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Impaired Loans [Member]
Assets
Assets nonrecurring			36,861	[2]
Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Collateral Dependent Impaired Loans [Member]
Assets
Assets nonrecurring	7,817
Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Other Real Estate Owned [Member]
Assets
Assets nonrecurring	11,974		6,658
Nonrecurring [Member] | Total Gains (Losses) [Member]
Assets
Assets nonrecurring	(1,284)		(2,682)
Nonrecurring [Member] | Total Gains (Losses) [Member] | Impaired Loans [Member]
Assets
Assets nonrecurring			(2,682)	[2]
Nonrecurring [Member] | Total Gains (Losses) [Member] | Collateral Dependent Impaired Loans [Member]
Assets
Assets nonrecurring	(1,284)
Nonrecurring [Member] | Total Gains (Losses) [Member] | Other Real Estate Owned [Member]
Assets
Assets nonrecurring

[1] Fair value is generally determined through independent appraisals of the underlying collateral, which generally include various Level 3 inputs which are not identifiable. Appraisals may be adjusted by management for qualitative factors such as economic factors and estimated liquidation expenses. The range of these possible adjustments may vary.

[2] Represents all impaired loans with an associated specific reserve at December 31, 2011. Included in this amount are $9.0 million of collateral dependent loans.