Investment Securities (Pooled Trust Preferred Securities) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2011		Dec. 31, 2010	Jun. 30, 2010
Amortized Cost	$ 2,168,082		$ 1,953,842
Investment securities available-for-sale	2,202,855		1,960,222	2,264,467
Pooled Trust Preferred Securities Group 1 [Member]
Amortized Cost	27,349		27,368	3,403
Investment securities available-for-sale	9,738		8,400
Unrealized Gain/(Loss)	(17,611)
Realized Losses	0
Pooled Trust Preferred Securities Group 1 [Member] | TROPC 2003-1A [Member]
Pooled trust preferred securities, Class	A4L
Lowest Credit Rating	C	[1]
Amortized Cost	978
Investment securities available-for-sale	641
Unrealized Gain/(Loss)	(337)
Realized Losses	0
Actual Deferrals and Defaults as a Percent of Original Collateral	40.10%
Expected Defaults as a Percentage of Remaining Performing Collateral	15.30%
Excess Subordination as a Percentage of Current Performing Collateral	0.00%
Pooled Trust Preferred Securities Group 1 [Member] | MM Community Funding IX [Member]
Pooled trust preferred securities, Class	B-2
Lowest Credit Rating	C	[1]		C
Amortized Cost	2,081			1,287
Investment securities available-for-sale	1,094
Unrealized Gain/(Loss)	(987)
Realized Losses	0
Actual Deferrals and Defaults as a Percent of Original Collateral	34.40%
Expected Defaults as a Percentage of Remaining Performing Collateral	14.40%
Excess Subordination as a Percentage of Current Performing Collateral	0.00%
Pooled Trust Preferred Securities Group 1 [Member] | Reg Div Funding 2004 [Member]
Pooled trust preferred securities, Class	B-2
Lowest Credit Rating	D	[1]
Amortized Cost	4,208
Investment securities available-for-sale	795
Unrealized Gain/(Loss)	(3,413)
Realized Losses	0
Actual Deferrals and Defaults as a Percent of Original Collateral	43.10%
Expected Defaults as a Percentage of Remaining Performing Collateral	12.40%
Excess Subordination as a Percentage of Current Performing Collateral	0.00%
Pooled Trust Preferred Securities Group 1 [Member] | Pretsl XII [Member]
Pooled trust preferred securities, Class	B-1
Lowest Credit Rating	C	[1]
Amortized Cost	2,886
Investment securities available-for-sale	1,693
Unrealized Gain/(Loss)	(1,193)
Realized Losses	0
Actual Deferrals and Defaults as a Percent of Original Collateral	30.40%
Expected Defaults as a Percentage of Remaining Performing Collateral	6.70%
Excess Subordination as a Percentage of Current Performing Collateral	0.00%
Pooled Trust Preferred Securities Group 1 [Member] | Pretsl XV [Member]
Pooled trust preferred securities, Class	B-1
Lowest Credit Rating	C	[1]
Amortized Cost	1,695
Investment securities available-for-sale	608
Unrealized Gain/(Loss)	(1,087)
Realized Losses	0
Actual Deferrals and Defaults as a Percent of Original Collateral	35.40%
Expected Defaults as a Percentage of Remaining Performing Collateral	10.00%
Excess Subordination as a Percentage of Current Performing Collateral	0.00%
Pooled Trust Preferred Securities Group 1 [Member] | Reg Div Funding 2005 [Member]
Pooled trust preferred securities, Class	B-1
Lowest Credit Rating	C	[1]
Amortized Cost	311
Investment securities available-for-sale	114
Unrealized Gain/(Loss)	(197)
Realized Losses	0
Actual Deferrals and Defaults as a Percent of Original Collateral	51.30%
Expected Defaults as a Percentage of Remaining Performing Collateral	30.90%
Excess Subordination as a Percentage of Current Performing Collateral	0.00%
Pooled Trust Preferred Securities Group 1 [Member] | MM Community Funding II [Member]
Pooled trust preferred securities, Class	B
Lowest Credit Rating	BB	[1]
Amortized Cost	979
Investment securities available-for-sale	947
Unrealized Gain/(Loss)	(32)
Realized Losses	0
Actual Deferrals and Defaults as a Percent of Original Collateral	4.70%
Expected Defaults as a Percentage of Remaining Performing Collateral	0.00%
Excess Subordination as a Percentage of Current Performing Collateral	26.90%
Pooled Trust Preferred Securities Group 1 [Member] | Pretsl XXVII LTD [Member]
Pooled trust preferred securities, Class	B
Lowest Credit Rating	CC	[1]
Amortized Cost	4,823
Investment securities available-for-sale	1,154
Unrealized Gain/(Loss)	(3,669)
Realized Losses	0
Actual Deferrals and Defaults as a Percent of Original Collateral	28.10%
Expected Defaults as a Percentage of Remaining Performing Collateral	23.70%
Excess Subordination as a Percentage of Current Performing Collateral	23.60%
Pooled Trust Preferred Securities Group 1 [Member] | Trapeza Ser 13A [Member]
Pooled trust preferred securities, Class	A2A
Lowest Credit Rating	CCC-	[1]
Amortized Cost	9,388
Investment securities available-for-sale	2,692
Unrealized Gain/(Loss)	(6,696)
Realized Losses	0
Actual Deferrals and Defaults as a Percent of Original Collateral	29.20%
Expected Defaults as a Percentage of Remaining Performing Collateral	22.60%
Excess Subordination as a Percentage of Current Performing Collateral	34.20%
Single Issuer Trust Preferred Securities [Member]
Amortized Cost	11,920
Investment securities available-for-sale	11,222
Unrealized Gain/(Loss)	(698)
Realized Losses	0
Single Issuer Trust Preferred Securities [Member] | First Empire Cap (M&T) 1 [Member]
Lowest Credit Rating	BBB-	[1]
Amortized Cost	955
Investment securities available-for-sale	1,021
Unrealized Gain/(Loss)	66
Realized Losses	0
Single Issuer Trust Preferred Securities [Member] | First Empire Cap (M&T) 2 [Member]
Lowest Credit Rating	BBB-	[1]
Amortized Cost	2,903
Investment securities available-for-sale	3,062
Unrealized Gain/(Loss)	159
Realized Losses	0
Single Issuer Trust Preferred Securities [Member] | Fleet Cap Tr V (BOA) [Member]
Lowest Credit Rating	BB+	[1]
Amortized Cost	3,354
Investment securities available-for-sale	2,873
Unrealized Gain/(Loss)	(481)
Realized Losses	0
Single Issuer Trust Preferred Securities [Member] | JP Morgan Chase Cap XIII [Member]
Lowest Credit Rating	BBB+	[1]
Amortized Cost	4,708
Investment securities available-for-sale	4,266
Unrealized Gain/(Loss)	(442)
Realized Losses	0
Trust Preferred Securities [Member]
Amortized Cost	39,269
Investment securities available-for-sale	20,960
Unrealized Gain/(Loss)	(18,309)
Realized Losses	$ 0
TROPC 2003-1A [Member]
Number of Issuers Currently Performing	19
Number of Issuers Currently Remaining	39
MM Community Funding IX [Member]
Number of Issuers Currently Performing	20
Number of Issuers Currently Remaining	33
Reg Div Funding 2004 [Member]
Number of Issuers Currently Performing	25
Number of Issuers Currently Remaining	45
Pretsl XII [Member]
Number of Issuers Currently Performing	50
Number of Issuers Currently Remaining	77
Pretsl XV [Member]
Number of Issuers Currently Performing	51
Number of Issuers Currently Remaining	72
Reg Div Funding 2005 [Member]
Number of Issuers Currently Performing	22
Number of Issuers Currently Remaining	49
MM Community Funding II [Member]
Number of Issuers Currently Performing	5
Number of Issuers Currently Remaining	8
Pretsl XXVII LTD [Member]
Number of Issuers Currently Performing	33
Number of Issuers Currently Remaining	49
Trapeza Ser 13A [Member]
Number of Issuers Currently Performing	36
Number of Issuers Currently Remaining	56

[1] Lowest rating for the security provided by any nationally recognized credit rating agency.