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Investments (Additional Information Of Trust Preferred Securities With Credit Rating Below Investment Grade) (Details) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2014 | Mar. 31, 2013 | Dec. 31, 2013
Schedule of Investments [Line Items] |  |  |  |
Available-for-sale Securities, Amortized Cost | $ 351,825,000 |  |  | $ 355,771,000
Securities held-to-maturity, Amortized Cost | 14,344,000 |  |  | 4,117,000
Securities available-for-sale, Estimated Fair Value | 349,940,000 |  |  | 352,660,000
Securities held-to-maturity, Estimated Fair Value | 15,015,000 |  |  | 5,335,000
Model assumption, recovery rate | 0.00% |  |  |
Credit-related net investment impairment losses | 0 |  | 0 | 0
P4 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Model assumption, number of banks deferring will cure | 1 |  |  |
Marketable Equity Securities [Member] | P1 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Type | Pooled |  |  |
Class | Mezz |  |  |
Original Cost | 826,000 |  |  |
Available-for-sale Securities, Amortized Cost | 190,000 |  |  |
Securities available-for-sale, Estimated Fair Value | 381,000 |  |  |
Difference (1) | 191,000 | [1] |  |
Lowest Credit Rating | Caa3 |  |  |
Number of issuers currently performing | 7 |  |  |
Actual deferrals/defaults (as a % of original dollar) | 19.50% |  |  |
Expected deferrals/defaults (as a % of remaining of performing collateral) | 20.00% | [2] |  |
Excess Subordination as a Percentage of Current Performing Collateral (4) | 52.20% | [3] |  |
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 |  |  |
Securities available-for-sale, Estimated Fair Value | 0 |  |  |
Difference (1) | 0 | [1] |  |
Lowest Credit Rating | Ca |  |  |
Number of issuers currently performing | 6 |  |  |
Actual deferrals/defaults (as a % of original dollar) | 22.30% |  |  |
Expected deferrals/defaults (as a % of remaining of performing collateral) | 0.00% | [2] |  |
Excess Subordination as a Percentage of Current Performing Collateral (4) | 0.00% | [3] |  |
Marketable Equity Securities [Member] | P3 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Type | Pooled | [4] |  |
Class | Mezz | [4] |  |
Original Cost | 2,962,000 | [4] |  |
Available-for-sale Securities, Amortized Cost | 1,419,000 | [4] |  |
Securities available-for-sale, Estimated Fair Value | 403,000 | [4] |  |
Difference (1) | (1,016,000) | [1],[4] |  |
Lowest Credit Rating | Caa3 | [4] |  |
Number of issuers currently performing | 22 | [4] |  |
Actual deferrals/defaults (as a % of original dollar) | 24.10% | [4] |  |
Expected deferrals/defaults (as a % of remaining of performing collateral) | 8.20% | [2],[4] |  |
Excess Subordination as a Percentage of Current Performing Collateral (4) | 17.30% | [3],[4] |  |
Marketable Equity Securities [Member] | P4 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Type | Pooled | [4] |  |
Class | Mezz | [4] |  |
Original Cost | 4,060,000 | [4] |  |
Available-for-sale Securities, Amortized Cost | 400,000 | [4] |  |
Securities available-for-sale, Estimated Fair Value | 162,000 | [4] |  |
Difference (1) | (238,000) | [1],[4] |  |
Lowest Credit Rating | Ca | [4] |  |
Number of issuers currently performing | 9 | [4] |  |
Actual deferrals/defaults (as a % of original dollar) | 19.20% | [4] |  |
Expected deferrals/defaults (as a % of remaining of performing collateral) | 7.10% | [4],[5] |  |
Excess Subordination as a Percentage of Current Performing Collateral (4) | 22.30% | [3],[4] |  |
Marketable Equity Securities [Member] | P5 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Type | Pooled |  |  |
Class | Mezz |  |  |
Original Cost | 6,062,000 |  |  |
Available-for-sale Securities, Amortized Cost | 678,000 |  |  |
Securities available-for-sale, Estimated Fair Value | 501,000 |  |  |
Difference (1) | (177,000) | [1] |  |
Lowest Credit Rating | Ca |  |  |
Number of issuers currently performing | 9 |  |  |
Actual deferrals/defaults (as a % of original dollar) | 22.70% | [4] |  |
Expected deferrals/defaults (as a % of remaining of performing collateral) | 20.00% | [2] |  |
Excess Subordination as a Percentage of Current Performing Collateral (4) | 49.20% | [3] |  |
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 |  |  |
Securities available-for-sale, Estimated Fair Value | 319,000 |  |  |
Difference (1) | 84,000 | [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 of performing collateral) | 0.00% |  |  |
Held-to-maturity Securities [Member] | P6 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Type | Pooled |  |  |
Class | Mezz |  |  |
Original Cost | 1,599,000 |  |  |
Securities held-to-maturity, Amortized Cost | 120,000 |  |  |
Securities held-to-maturity, Estimated Fair Value | 762,000 |  |  |
Difference (1) | 642,000 | [1] |  |
Lowest Credit Rating | Caa3 |  |  |
Number of issuers currently performing | 7 |  |  |
Actual deferrals/defaults (as a % of original dollar) | 19.50% |  |  |
Expected deferrals/defaults (as a % of remaining of performing collateral) | 20.00% | [2] |  |
Excess Subordination as a Percentage of Current Performing Collateral (4) | 52.20% | [3] |  |
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 | 6 |  |  |
Actual deferrals/defaults (as a % of original dollar) | 22.30% |  |  |
Expected deferrals/defaults (as a % of remaining of performing collateral) | 0.00% | [2] |  |
Excess Subordination as a Percentage of Current Performing Collateral (4) | 0.00% | [3] |  |
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 of performing collateral) | 0.00% |  |  |
[1] | The differences noted consist of unrealized gains (losses) recorded at March 31, 2014 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] | .
[5] | 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 is currently deferring will cure. If additional underlying issuers cure, this bond could recover at a higher percentage.

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