Investments (Additional Information Of Trust Preferred Securities With Credit Rating Below Investment Grade) (Details) (USD $)	3 Months Ended			12 Months Ended
	Mar. 31, 2015		Mar. 31, 2014	Dec. 31, 2014
Schedule of Investments [Line Items]
Available-for-sale Securities, Amortized Cost	$ 270,336,000			$ 251,954,000
Securities held-to-maturity, Amortized Cost	87,455,000			90,786,000
Investment securities available for sale, at fair value	273,856,000			254,043,000
Securities held-to-maturity, Estimated Fair Value	91,117,000			94,191,000
Model assumption, recovery rate	0.00%
Credit-related net investment impairment losses	0		0	0
Marketable Equity Securities [Member] | P1 [Member]
Schedule of Investments [Line Items]
Type	Pooled
Class	Mezz
Original Cost	633,000
Available-for-sale Securities, Amortized Cost	16,000
Investment securities available for sale, at fair value	311,000
Difference (1)	295,000	[1]
Lowest Credit Rating	Caa1
Number of issuers currently performing	5
Actual deferrals/defaults (as a % of original dollar)	14.50%
Expected deferrals/defaults (as a % of remaining performing collateral)	19.00%	[2]
Excess Subordination as a Percentage of Current Performing Collateral (3)	74.50%
Marketable Equity Securities [Member] | P2 [Member]
Schedule of Investments [Line Items]
Type	Pooled
Class	Mezz
Original Cost	2,535,000
Available-for-sale Securities, Amortized Cost	0
Investment securities available for sale, at fair value	0
Difference (1)	0	[1]
Lowest Credit Rating	Ca
Number of issuers currently performing	3
Actual deferrals/defaults (as a % of original dollar)	22.30%
Expected deferrals/defaults (as a % of remaining performing collateral)	0.00%	[2]
Excess Subordination as a Percentage of Current Performing Collateral (3)	0.00%
Marketable Equity Securities [Member] | P3 [Member]
Schedule of Investments [Line Items]
Type	Pooled
Class	Mezz
Original Cost	2,962,000
Available-for-sale Securities, Amortized Cost	1,419,000
Investment securities available for sale, at fair value	756,000
Difference (1)	(663,000)	[1]
Lowest Credit Rating	Caa3
Number of issuers currently performing	17
Actual deferrals/defaults (as a % of original dollar)	21.80%
Expected deferrals/defaults (as a % of remaining performing collateral)	7.10%	[2]
Excess Subordination as a Percentage of Current Performing Collateral (3)	0.00%
Marketable Equity Securities [Member] | P5 [Member]
Schedule of Investments [Line Items]
Type	Pooled
Class	Mezz
Original Cost	6,015,000
Available-for-sale Securities, Amortized Cost	512,000
Investment securities available for sale, at fair value	664,000
Difference (1)	152,000	[1]
Lowest Credit Rating	C
Number of issuers currently performing	7
Actual deferrals/defaults (as a % of original dollar)	15.30%
Expected deferrals/defaults (as a % of remaining performing collateral)	19.00%	[2]
Excess Subordination as a Percentage of Current Performing Collateral (3)	39.90%
Marketable Equity Securities [Member] | S5 [Member]
Schedule of Investments [Line Items]
Type	Single
Original Cost	261,000
Available-for-sale Securities, Amortized Cost	235,000
Investment securities available for sale, at fair value	249,000
Difference (1)	14,000	[1]
Lowest Credit Rating	NR
Number of issuers currently performing	1
Actual deferrals/defaults (as a % of original dollar)	0.00%
Expected deferrals/defaults (as a % of remaining performing collateral)	0.00%
Held-to-maturity Securities [Member] | P6 [Member]
Schedule of Investments [Line Items]
Type	Pooled
Class	Mezz
Original Cost	1,225,000
Securities held-to-maturity, Amortized Cost	47,000
Securities held-to-maturity, Estimated Fair Value	622,000
Difference (1)	575,000	[1]
Lowest Credit Rating	Caa1
Number of issuers currently performing	5
Actual deferrals/defaults (as a % of original dollar)	14.50%
Expected deferrals/defaults (as a % of remaining performing collateral)	19.00%	[2]
Excess Subordination as a Percentage of Current Performing Collateral (3)	74.50%
Held-to-maturity Securities [Member] | P7 [Member]
Schedule of Investments [Line Items]
Type	Pooled
Class	Mezz
Original Cost	3,367,000
Securities held-to-maturity, Amortized Cost	0
Securities held-to-maturity, Estimated Fair Value	0
Difference (1)	0	[1]
Lowest Credit Rating	Ca
Number of issuers currently performing	3
Actual deferrals/defaults (as a % of original dollar)	22.30%
Expected deferrals/defaults (as a % of remaining performing collateral)	0.00%	[2]
Excess Subordination as a Percentage of Current Performing Collateral (3)	0.00%
Held-to-maturity Securities [Member] | S9 [Member]
Schedule of Investments [Line Items]
Type	Single
Original Cost	4,000,000
Securities held-to-maturity, Amortized Cost	4,000,000
Securities held-to-maturity, Estimated Fair Value	4,000,000
Difference (1)	$ 0	[1]
Lowest Credit Rating	NR
Number of issuers currently performing	1
Actual deferrals/defaults (as a % of original dollar)	0.00%
Expected deferrals/defaults (as a % of remaining performing collateral)	0.00%

[1] The differences noted consist of unrealized gains (losses) recorded at March 31, 2015 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.