Investment Securities (Amortized Cost, Gross Unrealized Gains, Gross Unrealized Losses, And Fair Values Of Investment Securities) (Details) (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Total investment securities, Amortized Cost	$ 2,448,709	$ 2,845,432
Total investment securities, Gross Unrealized Gains	38,404	26,772
Total investment securities, Gross Unrealized Losses	15,633	31,278
Total investment securities, Fair Value	2,471,480	2,840,926
Securities Available-for-Sale, Amortized Cost	1,176,942	2,005,330
Securities Available-for-Sale, Gross Unrealized Gains	19,404	18,903
Securities Available-for-Sale, Gross Unrealized Losses	11,842	20,666
Securities Available-for-Sale, Fair Value	1,184,504	2,003,567
Securities Held-to-Maturity, Amortized Cost	1,271,767	840,102
Held-to-maturity Securities, Unrecognized Holding Gains	19,000	7,869
Held-to-maturity Securities, Unrecognized Holding Losses	3,791	10,612
Securities Held-to-Maturity, Fair Value	1,286,976	837,359
Other Equity Securities [Member]
Securities Available-for-Sale, Amortized Cost	1,468	1,468
Securities Available-for-Sale, Gross Unrealized Gains	1,562	224
Securities Available-for-Sale, Fair Value	3,030	1,692
U.S. Government Sponsored Entities [Member]
Securities Available-for-Sale, Amortized Cost	210,000	830,269
Securities Available-for-Sale, Gross Unrealized Gains	212	1,653
Securities Available-for-Sale, Gross Unrealized Losses	360	6,840
Securities Available-for-Sale, Fair Value	209,852	825,082
Securities Held-to-Maturity, Amortized Cost	99,943	99,921
Held-to-maturity Securities, Unrecognized Holding Gains	2,204	2,639
Securities Held-to-Maturity, Fair Value	102,147	102,560
State And Municipal Securities [Member]
Securities Available-for-Sale, Amortized Cost	1,872	1,875
Securities Available-for-Sale, Gross Unrealized Gains	6
Securities Available-for-Sale, Gross Unrealized Losses	66	157
Securities Available-for-Sale, Fair Value	1,812	1,718
Securities Held-to-Maturity, Amortized Cost	129,842	130,107
Held-to-maturity Securities, Unrecognized Holding Gains	609
Held-to-maturity Securities, Unrecognized Holding Losses	2,191	8,946
Securities Held-to-Maturity, Fair Value	128,260	121,161
Mortgage-Backed Securities [Member]
Securities Available-for-Sale, Amortized Cost	387,670	627,574
Securities Available-for-Sale, Gross Unrealized Gains	13,376	14,854
Securities Available-for-Sale, Gross Unrealized Losses	726	123
Securities Available-for-Sale, Fair Value	400,320	642,305
Securities Held-to-Maturity, Amortized Cost	1,032,013	600,107
Held-to-maturity Securities, Unrecognized Holding Gains	16,187	5,230
Held-to-maturity Securities, Unrecognized Holding Losses	1,593	1,653
Securities Held-to-Maturity, Fair Value	1,046,607	603,684
Other Debt Securities [Member]
Securities Held-to-Maturity, Amortized Cost	9,969	9,967
Held-to-maturity Securities, Unrecognized Holding Losses	7	13
Securities Held-to-Maturity, Fair Value	9,962	9,954
U.S. Treasury Securities [Member]
Securities Available-for-Sale, Amortized Cost	125,534	125,573
Securities Available-for-Sale, Gross Unrealized Losses	3,552	6,745
Securities Available-for-Sale, Fair Value	121,982	118,828
Collateralized Mortgage Obligations [Member]
Securities Available-for-Sale, Amortized Cost	19,824	24,719
Securities Available-for-Sale, Gross Unrealized Gains	586	590
Securities Available-for-Sale, Gross Unrealized Losses	95	115
Securities Available-for-Sale, Fair Value	20,315	25,194
Asset-Backed Securities [Member]
Securities Available-for-Sale, Amortized Cost	187	245
Securities Available-for-Sale, Gross Unrealized Losses	4	5
Securities Available-for-Sale, Fair Value	183	240
Corporate Bonds [Member]
Securities Available-for-Sale, Amortized Cost	341,516	336,476
Securities Available-for-Sale, Gross Unrealized Gains	603	1,307
Securities Available-for-Sale, Gross Unrealized Losses	6,286	5,792
Securities Available-for-Sale, Fair Value	335,833	331,991
Mutual Funds [Member]
Securities Available-for-Sale, Amortized Cost	4,000	4,000
Securities Available-for-Sale, Gross Unrealized Losses	33	73
Securities Available-for-Sale, Fair Value	3,967	3,927
Preferred Stock Of Government Sponsored Entities [Member]
Securities Available-for-Sale, Amortized Cost	569	569
Securities Available-for-Sale, Gross Unrealized Gains	2,814	150
Securities Available-for-Sale, Fair Value	3,383	719
Other Foreign Debt Securities [Member]
Securities Available-for-Sale, Amortized Cost	57,995	38,013
Securities Available-for-Sale, Gross Unrealized Gains	54	67
Securities Available-for-Sale, Gross Unrealized Losses	683	646
Securities Available-for-Sale, Fair Value	57,366	37,434
Trust Preferred Securities [Member]
Securities Available-for-Sale, Amortized Cost	26,307	14,549
Securities Available-for-Sale, Gross Unrealized Gains	191	58
Securities Available-for-Sale, Gross Unrealized Losses	37	170
Securities Available-for-Sale, Fair Value	$ 26,461	$ 14,437

Amortized Cost of Investment Securities

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Gross Unrealized Gains of Investment Securities

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Investment Securities Gross Unrealized Losses

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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.

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

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For an unclassified balance sheet, this item represents investments in debt securities which are categorized as held-to-maturity. The held-to-maturity category is for those securities that the entity has the positive intent and ability to hold until maturity.

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This item represents the aggregate fair value of investments in debt securities as of the balance sheet date and which are categorized as held-to-maturity.

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As of the balance sheet date, the excess of fair value over carrying value (amortized cost) of a debt security categorized as held-to-maturity, exclusive of dividend or interest income recognized but not yet received and exclusive of any write-downs for other-than-temporary impairment. Such item represents the gross unrecognized holding gain.

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As of the balance sheet date, the excess of carrying value (amortized cost) over fair value of a debt security categorized as held-to-maturity, exclusive of dividend or interest income recognized but not yet received and exclusive of any write-downs for other-than-temporary impairment. Such item represents the gross unrecognized holding loss.

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Value of the investment at close of period. For schedules of investments that are categorized, the value would be aggregated by category. For investment in and advances to affiliates, if operations of any controlled companies are different in character from those of the company, group such affiliates within divisions and by type of activities.

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