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Employment Benefit Plans (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2013
Postemployment Benefits [Abstract] |
Projected Benefit Payments from Postretirement Plan | The following table sets forth projected benefit payments from Ambac’s postretirement plan over the next ten years for current retirees:
|  | Amount |
2014 |  |  | 299 |
2015 |  |  | 327 |
2016 |  |  | 339 |
2017 |  |  | 337 |
2018 |  |  | 358 |
All later years |  |  | 2,141 |
|  | $ | 3,801 |
Schedule of Assumptions on Stock Options Grant | The Black-Scholes-Merton model was used to estimate the fair value of the service condition based stock options on the grant date. The assumptions for the 2013 stock option grant are as follows:
|  | 2013 |
Risk-free interest rate |  |  | 0.963 | %
Expected volatility |  |  | 50.2 | %
Dividend yield |  |  | 0.0 | %
Expected life |  |  | 3.33 years |
Option Activity | A summary of option activity for the years ending December 31, 2013 and 2012 is as follows:
|  | Successor Ambac – 8 months Ended December 31, 2013 |
|  | Shares |  |  | Weighted Average Exercise Price |  |  | Aggregate Intrinsic Value |  |  | Weighted Average Remaining Contractual Life |
Outstanding at beginning of period |  |  | — |  |  | $ | — |  |  |  |  |  |  |  |  |
Granted |  |  | 66,668 |  |  |  | 20.63 |  |  | $ | 262 |  |  |  | 6.98 |
Exercised |  |  | — |  |  |  | na. |  |  |  |  |  |  |  |  |
Forfeited or expired |  |  | — |  |  |  | na. |  |  |  |  |  |  |  |  |
Outstanding at end of period |  |  | 66,668 |  |  | $ | 20.63 |  |  | $ | 262 |  |  |  | 6.98 |
Exercisable |  |  | — |  |  | $ | — |  |  | $ | — |  |  |  | na. |
|  | Predecessor Ambac – 4 months Ended April 30, 2013 |
|  | Shares |  |  | Weighted Average Exercise Price |  |  | Aggregate Intrinsic Value |  |  | Weighted Average Remaining Contractual Life |
Outstanding at beginning of period |  |  | 602,775 |  |  |  | $41.17 |  |  |  |  |  |  |  |  |
Granted |  |  | — |  |  |  | na. |  |  |  |  |  |  |  |  |
Exercised |  |  | — |  |  |  | na. |  |  |  |  |  |  |  |  |
Forfeited or expired |  |  | (602,775) |  |  |  | $41.17 |  |  |  |  |  |  |  |  |
Outstanding at end of period |  |  | — |  |  |  | na. |  |  |  | $— |  |  |  | na. |
Exercisable |  |  | — |  |  |  | $ — |  |  |  | $— |  |  |  | na. |
|  | Predecessor Ambac – December 31, 2012 |
|  | Shares |  |  | Weighted Average Exercise Price |  |  | Aggregate Intrinsic Value |  |  | Weighted Average Remaining Contractual Life |
Outstanding at beginning of year |  |  | 1,139,429 |  |  |  | $45.15 |  |  |  |  |  |  |  |  |
Granted |  |  | — |  |  |  | na. |  |  |  |  |  |  |  |  |
Exercised |  |  | — |  |  |  | na. |  |  |  |  |  |  |  |  |
Forfeited or expired |  |  | (536,654) |  |  |  | $49.63 |  |  |  |  |  |  |  |  |
Outstanding at end of year |  |  | 602,775 |  |  |  | $41.17 |  |  |  | $— |  |  |  | 1.46 |
Exercisable |  |  | 602,775 |  |  |  | $41.17 |  |  |  | $— |  |  |  | 1.46 |
RSU Awards Information | Information with respect to the RSU awards is as follows:
|  | 2013 |
RSUs and other stock awarded |  |  | 155,123 |
Weighted average fair value per share |  | $ | 20.63 |
Gross RSU expense |  | $ | 1,051 |
Net income effect |  | $ | 1,051 |
Summary of Rsu and Other Stock Activity | A summary of RSU activity for 2013 and 2012 is as follows:
|  | Successor Ambac – 8 Months Ended December 31, 2013 |
|  | Shares |  |  | Weighted Average Grant Date Fair Value |
Outstanding at beginning of period |  |  | — |  |  | $ | — |
Granted |  |  | 155,123 |  |  | $ | 20.63 |
Delivered |  |  | (937 | ) |  | $ | 20.63 |
Forfeited |  |  | — |  |  | $ | — |
Outstanding at end of period |  |  | 154,186 |  |  | $ | 20.63 |
|  | Predecessor Ambac – 4 Months Ended April 30, 2013 |
|  | Shares |  |  | Weighted Average Grant Date Fair Value |
Outstanding at beginning of period |  |  | 104,389 |  |  | $ | 21.43 |
Granted |  |  | — |  |  | $ | — |
Delivered |  |  | (843 | ) |  | $ | 74.43 |
Forfeited |  |  | (103,546 | ) |  | $ | 20.40 |
Outstanding at end of period |  |  | — |  |  | $ | — |
|  | Predecessor Ambac – December 31, 2012 |
|  | Shares |  |  | Weighted Average Grant Date Fair Value |
Outstanding at beginning of year |  |  | 113,739 |  |  | $ | 23.96 |
Granted |  |  | — |  |  | $ | — |
Delivered |  |  | (9,350 | ) |  | $ | 52.16 |
Forfeited |  |  | — |  |  | $ | — |
Outstanding at end of year |  |  | 104,389 |  |  | $ | 21.43 |

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