Investments (Additional Information Of Trust Preferred Securities With Credit Rating Below Investment Grade) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended		12 Months Ended
	Jun. 30, 2012		Dec. 31, 2011
Schedule of Investments [Line Items]
Available-for-sale Securities, Amortized Cost	$ 372,168		$ 358,281
Investment securities available for sale, at fair value	376,891		360,783
Securities held-to-maturity, Amortized Cost	19,319		23,458
Held-to-maturity Securities, Fair Value	19,627		23,423
P3 [Member]
Schedule of Investments [Line Items]
Other-than-temporary impairment losses	11,000		115,000
P4 [Member]
Schedule of Investments [Line Items]
Other-than-temporary impairment losses	293,000		240,000
Available-for-sale Securities [Member] | P1 [Member]
Schedule of Investments [Line Items]
Type	Pooled
Class	Mezz
Original Cost	1,158
Available-for-sale Securities, Amortized Cost	490
Investment securities available for sale, at fair value	222
Difference	(268)	[1]
Lowest Credit Rating	Ca
# of issuers currently performing	14
Actual deferrals/defaults (as a % of original dollar)	26.10%
Expected deferrals/defaults (as a % of remaining of performing collateral)	17.60%	[2]
Excess Subordination as a Percentage of Current Performing Collateral	20.00%	[3]
Available-for-sale Securities [Member] | P2 [Member]
Schedule of Investments [Line Items]
Type	Pooled
Class	Mezz
Original Cost	3,944
Available-for-sale Securities, Amortized Cost	1,197
Investment securities available for sale, at fair value	776
Difference	(421)	[1]
Lowest Credit Rating	Ca
# of issuers currently performing	13
Actual deferrals/defaults (as a % of original dollar)	25.90%
Expected deferrals/defaults (as a % of remaining of performing collateral)	22.50%	[2]
Excess Subordination as a Percentage of Current Performing Collateral	9.10%	[3]
Available-for-sale Securities [Member] | P3 [Member]
Schedule of Investments [Line Items]
Type	Pooled	[4]
Class	Mezz	[4]
Original Cost	2,962	[4]
Available-for-sale Securities, Amortized Cost	1,419	[4]
Investment securities available for sale, at fair value	373	[4]
Difference	(1,046)	[1],[4]
Lowest Credit Rating	Caa3	[4]
# of issuers currently performing	24	[4]
Actual deferrals/defaults (as a % of original dollar)	24.50%	[4]
Expected deferrals/defaults (as a % of remaining of performing collateral)	21.80%	[2],[4]
Excess Subordination as a Percentage of Current Performing Collateral	0.00%	[3],[4]
Available-for-sale Securities [Member] | P4 [Member]
Schedule of Investments [Line Items]
Type	Pooled	[5]
Class	Mezz	[5]
Original Cost	4,060	[5]
Available-for-sale Securities, Amortized Cost	672	[5]
Investment securities available for sale, at fair value	209	[5]
Difference	(463)	[1],[5]
Lowest Credit Rating	Ca	[5]
# of issuers currently performing	11	[5]
Actual deferrals/defaults (as a % of original dollar)	24.20%	[5]
Expected deferrals/defaults (as a % of remaining of performing collateral)	0.00%	[5],[6]
Excess Subordination as a Percentage of Current Performing Collateral	0.00%	[3],[5]
Available-for-sale Securities [Member] | P5 [Member]
Schedule of Investments [Line Items]
Type	Pooled
Class	Mezz
Original Cost	5,806
Available-for-sale Securities, Amortized Cost	826
Investment securities available for sale, at fair value	335
Difference	(491)	[1]
Lowest Credit Rating	Ca
# of issuers currently performing	14
Actual deferrals/defaults (as a % of original dollar)	27.50%
Expected deferrals/defaults (as a % of remaining of performing collateral)	21.70%	[2]
Excess Subordination as a Percentage of Current Performing Collateral	16.40%	[3]
Available-for-sale Securities [Member] | S1 [Member]
Schedule of Investments [Line Items]
Type	Single
Original Cost	2,048
Available-for-sale Securities, Amortized Cost	2,028
Investment securities available for sale, at fair value	2,049
Difference	21	[1]
Lowest Credit Rating	BB+
# of issuers currently performing	1
Available-for-sale Securities [Member] | S2 [Member]
Schedule of Investments [Line Items]
Type	Single
Original Cost	535
Available-for-sale Securities, Amortized Cost	509
Investment securities available for sale, at fair value	511
Difference	2	[1]
Lowest Credit Rating	BB+
# of issuers currently performing	1
Available-for-sale Securities [Member] | S3 [Member]
Schedule of Investments [Line Items]
Type	Single
Original Cost	261
Available-for-sale Securities, Amortized Cost	235
Investment securities available for sale, at fair value	128
Difference	(107)	[1]
Lowest Credit Rating	NR
# of issuers currently performing	1
Available-for-sale Securities [Member] | S4 [Member]
Schedule of Investments [Line Items]
Type	Single
Original Cost	3,000
Available-for-sale Securities, Amortized Cost	3,000
Investment securities available for sale, at fair value	3,060
Difference	60	[1]
Lowest Credit Rating	B2
# of issuers currently performing	1
Available-for-sale Securities [Member] | S5 [Member]
Schedule of Investments [Line Items]
Type	Single
Original Cost	1,000
Available-for-sale Securities, Amortized Cost	1,000
Investment securities available for sale, at fair value	1,038
Difference	38	[1]
Lowest Credit Rating	B2
# of issuers currently performing	1
Held-to-maturity Securities [Member] | P6 [Member]
Schedule of Investments [Line Items]
Type	Pooled
Class	Mezz
Original Cost	2,241
Securities held-to-maturity, Amortized Cost	315
Held-to-maturity Securities, Fair Value	445
Difference	130	[1]
Lowest Credit Rating	Ca
# of issuers currently performing	14
Actual deferrals/defaults (as a % of original dollar)	26.10%
Expected deferrals/defaults (as a % of remaining of performing collateral)	17.60%	[2]
Excess Subordination as a Percentage of Current Performing Collateral	20.00%	[3]
Held-to-maturity Securities [Member] | P7 [Member]
Schedule of Investments [Line Items]
Type	Pooled
Class	Mezz
Original Cost	5,237
Securities held-to-maturity, Amortized Cost	1,061
Held-to-maturity Securities, Fair Value	1,035
Difference	(26)	[1]
Lowest Credit Rating	Ca
# of issuers currently performing	13
Actual deferrals/defaults (as a % of original dollar)	25.90%
Expected deferrals/defaults (as a % of remaining of performing collateral)	22.50%	[2]
Excess Subordination as a Percentage of Current Performing Collateral	9.10%	[3]
Held-to-maturity Securities [Member] | S6 [Member]
Schedule of Investments [Line Items]
Type	Single
Original Cost	4,000
Securities held-to-maturity, Amortized Cost	4,000
Held-to-maturity Securities, Fair Value	4,000
Lowest Credit Rating	NR
# of issuers currently performing	1
Held-to-maturity Securities [Member] | S7 [Member]
Schedule of Investments [Line Items]
Type	Single
Original Cost	3,360
Securities held-to-maturity, Amortized Cost	3,101
Held-to-maturity Securities, Fair Value	2,940
Difference	(161)	[1]
Lowest Credit Rating	NR
# of issuers currently performing	1
Held-to-maturity Securities [Member] | S8 [Member]
Schedule of Investments [Line Items]
Type	Single
Original Cost	3,564
Securities held-to-maturity, Amortized Cost	3,533
Held-to-maturity Securities, Fair Value	3,544
Difference	$ 11	[1]
Lowest Credit Rating	NR
# of issuers currently performing	1

[1] The differences noted consist of unrealized losses recorded at June 30, 2012 and noncredit other-than-temporary impairment losses recorded subsequent to April 1, 2009 that have not been reclassified as credit losses.

[2] Performing collateral is defined as total collateral minus all collateral that has been called, is currently deferring, or currently in default. This model for this security assumes that all collateral that is currently deferring will default with a zero recovery rate. The underlying issuers can cure, thus this bond could recover at a higher percentage upon default than zero.

[3] Excess subordination is defined as the additional defaults/deferrals necessary in the next reporting period to deplete the entire credit enhancement (excess interest and over-collateralization) beneath our tranche within each pool to the point that would cause a "break in yield." This amount assumes that all currently performing collateral continues to perform. A break in yield means that our security would not be expected to receive all the contractual cash flows (principal and interest) by maturity. The "percent of current performing collateral" is the ratio of the "excess subordination amount" to current performing collateral—a higher percent means there is more excess subordination to absorb additional defaults/deferrals, and the better our security is protected from loss.

[4] Other-than-temporary impairment losses of $11,000 were recognized during the six months ended June 30, 2012. Other-than-temporary impairment losses of $115,000 were recognized during the year ended December 31, 2011.

[5] Other-than-temporary impairment losses of $293,000 were recognized during the six months ended June 30, 2012. Other-than-temporary impairment losses of $240,000 were recognized during the year ended December 31, 2011.

[6] Performing collateral is defined as total collateral minus all collateral that has been called, is currently deferring, or currently in default. The model for this security assumes that one of the banks that are currently deferring will cure by June 2013. If additional underlying issuers cure, this bond could recover at a higher percentage.