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CUSTOMER DEPOSIT ACCOUNTS (Details) (USD $) | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
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CUSTOMER DEPOSIT ACCOUNTS |  |  |
Threshold for classifying customer deposit accounts | $ 100,000 | $ 100,000 | $ 100,000
Customer deposit account balances |  |  |
Noninterest-bearing demand | 3,492,795,000 | 2,676,466,000 |
Interest-bearing checking | 971,179,000 | 757,446,000 |
Money market accounts | 4,678,409,000 | 4,457,376,000 |
Savings deposits | 1,164,618,000 | 984,518,000 |
Total core deposits | 10,307,001,000 | 8,875,806,000 |
Time deposits: |  |  |
Less than $100,000 | 2,186,604,000 | 2,239,836,000 |
$100,000 or greater | 4,959,397,000 | 4,525,617,000 |
Total time deposits | 7,146,001,000 | 6,765,453,000 |
Total deposits | 17,453,002,000 | 15,641,259,000 |
Time deposits $100 thousand or greater held by the Company's foreign branch located in Hong Kong | $ 264,600,000 | $ 481,800,000 |

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- Definition Amount of deposits in accounts that offer many of the same services as checking accounts although transactions may be somewhat more limited, share some of the characteristics of a money market fund and are insured by the Federal government, also known as money market accounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher OTS -Name Federal Regulation (FR) -Number Title 12 -Chapter V -Section 563c.102 -Paragraph 14 -Subparagraph a(i) -LegacyDoc This is a non-GAAP reference that was included in the 2009 taxonomy. It will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.12) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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