FAIR VALUE (Details) (Fair Value, Measurements, Recurring, USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Fair Value Measurements
Investment securities available-for-sale
Total investment securities available-for-sale	$ 2,588,993	$ 2,607,029
Derivative
Derivatives liabilities	(41,024)	(42,060)
Fair Value Measurements \| Foreign exchange options
Derivative
Derivative assets	5,340	5,011
Fair Value Measurements \| Interest rate swaps
Derivative
Derivative assets	34,192	36,943
Fair Value Measurements \| Short-term foreign exchange contracts
Derivative
Short-term foreign exchange contracts	1,303	896
Fair Value Measurements \| U.S. Treasury securities
Investment securities available-for-sale
Total investment securities available-for-sale	470,764	460,677
Fair Value Measurements \| U.S. Government agency and U.S. Government sponsored enterprise debt securities
Investment securities available-for-sale
Total investment securities available-for-sale	197,537	197,855
Fair Value Measurements \| U.S. Government agency and U.S. Government sponsored enterprise mortgage-backed securities - Commercial mortgage-backed securities
Investment securities available-for-sale
Total investment securities available-for-sale	145,044	180,665
Fair Value Measurements \| U.S. Government agency and U.S. Government sponsored enterprise mortgage-backed securities - Residential mortgage-backed securities
Investment securities available-for-sale
Total investment securities available-for-sale	1,035,415	1,144,085
Fair Value Measurements \| Municipal securities
Investment securities available-for-sale
Total investment securities available-for-sale	206,758	167,093
Fair Value Measurements \| Other commercial mortgage-backed securities: \| Investment grade
Investment securities available-for-sale
Total investment securities available-for-sale	51,359	17,084
Fair Value Measurements \| Corporate debt securities \| Investment grade
Investment securities available-for-sale
Total investment securities available-for-sale	453,323	411,983
Fair Value Measurements \| Corporate debt securities \| Non-investment grade
Investment securities available-for-sale
Total investment securities available-for-sale	18,000	17,417
Fair Value Measurements \| Other securities
Investment securities available-for-sale
Total investment securities available-for-sale	10,793	10,170
Quoted Prices in Active Markets for Identical Assets (Level 1)
Investment securities available-for-sale
Total investment securities available-for-sale	470,764	460,677
Quoted Prices in Active Markets for Identical Assets (Level 1) \| U.S. Treasury securities
Investment securities available-for-sale
Total investment securities available-for-sale	470,764	460,677
Significant Other Observable Inputs (Level 2)
Investment securities available-for-sale
Total investment securities available-for-sale	2,112,945	2,141,552
Derivative
Derivatives liabilities	(37,791)	(39,008)
Significant Other Observable Inputs (Level 2) \| Foreign exchange options
Derivative
Derivative assets	5,340	5,011
Significant Other Observable Inputs (Level 2) \| Interest rate swaps
Derivative
Derivative assets	34,192	36,943
Significant Other Observable Inputs (Level 2) \| Short-term foreign exchange contracts
Derivative
Short-term foreign exchange contracts	1,303	896
Significant Other Observable Inputs (Level 2) \| U.S. Government agency and U.S. Government sponsored enterprise debt securities
Investment securities available-for-sale
Total investment securities available-for-sale	197,537	197,855
Significant Other Observable Inputs (Level 2) \| U.S. Government agency and U.S. Government sponsored enterprise mortgage-backed securities - Commercial mortgage-backed securities
Investment securities available-for-sale
Total investment securities available-for-sale	145,044	180,665
Significant Other Observable Inputs (Level 2) \| U.S. Government agency and U.S. Government sponsored enterprise mortgage-backed securities - Residential mortgage-backed securities
Investment securities available-for-sale
Total investment securities available-for-sale	1,035,415	1,144,085
Significant Other Observable Inputs (Level 2) \| Municipal securities
Investment securities available-for-sale
Total investment securities available-for-sale	206,758	167,093
Significant Other Observable Inputs (Level 2) \| Other commercial mortgage-backed securities: \| Investment grade
Investment securities available-for-sale
Total investment securities available-for-sale	51,359	17,084
Significant Other Observable Inputs (Level 2) \| Corporate debt securities \| Investment grade
Investment securities available-for-sale
Total investment securities available-for-sale	453,323	411,983
Significant Other Observable Inputs (Level 2) \| Corporate debt securities \| Non-investment grade
Investment securities available-for-sale
Total investment securities available-for-sale	12,716	12,617
Significant Other Observable Inputs (Level 2) \| Other securities
Investment securities available-for-sale
Total investment securities available-for-sale	10,793	10,170
Significant Unobservable Inputs (Level 3)
Investment securities available-for-sale
Total investment securities available-for-sale	5,284	4,800
Derivative
Derivatives liabilities	(3,233)	(3,052)
Significant Unobservable Inputs (Level 3) \| Corporate debt securities \| Non-investment grade
Investment securities available-for-sale
Total investment securities available-for-sale	$ 5,284	$ 4,800

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.

+ References+ Details

Fair values as of the balance sheet date for all assets resulting from contracts that meet the criteria of being accounted for as derivative instruments and which are expected to be converted into cash or otherwise disposed of within a year or the normal operating cycle, if longer, net of the effects of master netting arrangements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name FASB Staff Position (FSP)

-Number FIN39-1

-Paragraph 10A, 10B

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 107

-Paragraph 10

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 45

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Current Assets

-URI http://asc.fasb.org/extlink&oid=6509628

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 10

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13433-108611

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 4, 17

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 43

-Section A

-Paragraph 4

-Chapter 3

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 15

-URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13495-108611

Reference 9: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 45

-Paragraph 6

-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41271-113958

+ Details

- Definition

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.

+ References+ Details

- Definition

Derivative instrument obligations meeting the definition of a liability which the Company is a party to as of the balance sheet date.

+ References+ Details