Securities (Schedule Of Amortized Cost And Fair Value Of Securities) (Details) (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Securities available for sale, Amortized Cost	$ 4,520,793	$ 1,445,721
Securities available for sale, Gross Unrealized Gains	63,173	51,701
Securities available for sale, Gross Unrealized Losses	9,993	8,537
Securities available for sale, Fair Value	4,573,973	1,488,885
U.S. Treasury [Member]
Securities available for sale, Amortized Cost	10,804	10,797
Securities available for sale, Gross Unrealized Gains	47	52
Securities available for sale, Gross Unrealized Losses		5
Securities available for sale, Fair Value	10,851	10,844
U.S. Government Agencies [Member]
Securities available for sale, Amortized Cost	424,141	106,054
Securities available for sale, Gross Unrealized Gains	2,141	971
Securities available for sale, Gross Unrealized Losses	802	434
Securities available for sale, Fair Value	425,480	106,591
Municipal Obligations [Member]
Securities available for sale, Amortized Cost	311,316	181,747
Securities available for sale, Gross Unrealized Gains	8,055	4,107
Securities available for sale, Gross Unrealized Losses	535	5,411
Securities available for sale, Fair Value	318,836	180,443
Mortgage-Backed Securities [Member]
Securities available for sale, Amortized Cost	2,248,990	761,704
Securities available for sale, Gross Unrealized Gains	42,452	38,032
Securities available for sale, Gross Unrealized Losses	6,315	50
Securities available for sale, Fair Value	2,285,127	799,686
Collateralized Mortgage Obligations [Member]
Securities available for sale, Amortized Cost	1,503,096	367,662
Securities available for sale, Gross Unrealized Gains	8,849	6,880
Securities available for sale, Gross Unrealized Losses	2,220	2,491
Securities available for sale, Fair Value	1,509,725	372,051
Other Debt Securities [Member]
Securities available for sale, Amortized Cost	17,950	14,329
Securities available for sale, Gross Unrealized Gains	957	999
Securities available for sale, Gross Unrealized Losses	23	43
Securities available for sale, Fair Value	18,884	15,285
Other Equity Securities [Member]
Securities available for sale, Amortized Cost	4,496	3,428
Securities available for sale, Gross Unrealized Gains	672	660
Securities available for sale, Gross Unrealized Losses	98	103
Securities available for sale, Fair Value	$ 5,070	$ 3,985

For an unclassified balance sheet, this item represents investments in debt and equity securities which are categorized neither as held-to-maturity nor trading.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 12
-Subparagraph b
-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 FASB Staff Position (FSP)
-Number FAS115-1/124-1
-Paragraph 15E
-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 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 22
-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 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS115-1/124-1
-Paragraph 15D
-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 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 13
-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 FASB
-Name FASB Staff Position (FSP)
-Number FAS115-1/124-1
-Paragraph 15C
-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 Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 14
-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 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 16
-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 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 25
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6379932&loc=d3e22054-111558

+ Details

- Definition

This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

+ References+ Details

- Definition

This item represents the gross unrealized gains for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities.

+ References+ Details