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Fair Value Measurements Fair Value, Reconciliation of Level 3 - Assets (Details) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 6 Months Ended | ||||||||||
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Jun. 30, 2014
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Jun. 30, 2013
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Jun. 30, 2014
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Jun. 30, 2013
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Convertible Debt Securities [Member]
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| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | ||||||||||||
| AFS Securities, Beginning Asset Value | $ 2,693 | $ 3,341 | $ 3,174 | $ 3,087 | ||||||||
| AFS Debt Security, (losses) included in OCI | (63) | (108) | (544) | 146 | ||||||||
| AFS Securities, Ending Asset Value | 2,630 | 3,233 | 2,630 | 3,233 | ||||||||
| Unrealized (Gains) Losses Still Held - Assets | (63) | [1] | (108) | [1] | (544) | [1] | 146 | [1] | ||||
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Redeemable Preferred Stock [Member]
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| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | ||||||||||||
| AFS Securities, Beginning Asset Value | 4,599 | [2] | 42,539 | [2] | 0 | [2] | 42,539 | [2] | ||||
| AFS Debt Security, (losses) included in OCI | (55) | 0 | (55) | 0 | ||||||||
| Purchase of redeemable preferred shares | 0 | 0 | 4,599 | 0 | ||||||||
| AFS Securities, Ending Asset Value | 4,544 | [2] | 42,539 | [2] | 4,544 | [2] | 42,539 | [2] | ||||
| Unrealized (Gains) Losses Still Held - Assets | $ (55) | [1] | $ 0 | [1] | $ (55) | [1] | $ 0 | [1] | ||||
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