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Background and Business Description AMPS Exchange (Details) - USD ($) | Aug. 03, 2018 | Jun. 30, 2018 | Jun. 22, 2018 | Dec. 31, 2017 | May 01, 2013
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AMPS Exchange Supporting Holder Percent of Total Outstanding |  |  | 89.00% |  |
AMPS Exchange Supporting Holder Minimum Tender Commitment |  |  | 80.00% |  |
Successor [Member] |  |  |  |  |
Preferred Stock, Shares Outstanding |  | 0 |  | 0 |
Stockholders' Equity Attributable to Noncontrolling Interest |  | $ 264,110,000 |  | $ 264,110,000 |
Warrants issued exercise price |  |  |  |  | $ 16.67
Ambac Assurance Corporation [Member] |  |  |  |  |
Preferred Stock, Shares Outstanding |  |  |  | 26,411 |
Preferred Stock, Liquidation Preference, Value |  |  |  | $ 660,275,000 |
Subsequent Event [Member] |  |  |  |  |
AMPS Exchange Surplus Notes Issued Per Share | $ 13,875 |  |  |  |
AMPS Exchange Shares Tendered | 22,096 |  |  |  |
AMPS Exchange Cash Paid Per Share | $ 500 |  |  |  |
AMPS Exchange Warrants Issued Per Share | 37.3076 |  |  |  |
AMPS Exchange Percent Acquired | 84.40% |  |  |  |
AMPS Exchange Shares Acquired | 22,296 |  |  |  |
AMPS Exchange Aggregate Liquidation Preference | $ 557,400,000 |  |  |  |
AMPS Exchange Total Surplus Notes Issued | 212,740,000 |  |  |  |
AMPS Exchange Interest Included in Surplus Notes Issued | 96,617,000 |  |  |  |
AMPS Exchange Total Cash Paid | $ 11,048,000 |  |  |  |
AMPS Exchange Total Warrants Issued | 824,307 |  |  |  |
AMPS Exchange Nominal Discount | $ 227,000,000 |  |  |  |
AMPS Exchange Nominal Discount at Fair Value | 252,000,000 |  |  |  |
AMPS Exchange Expected Loss Based on Carry Value | 83,000,000 |  |  |  |
AMPS Liquidation Preference Value Per Share | 25,000 |  |  |  |
Subsequent Event [Member] | Successor [Member] |  |  |  |  |
Stockholders' Equity Attributable to Noncontrolling Interest | 41,150,000 |  |  |  |
Subsequent Event [Member] | Afg [Member] |  |  |  |  |
AMPS Exchange Aggregate Liquidation Preference | $ 34,650,000 |  |  |  |

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- Definition AMPS Exchange Expected Loss Based on Carry Value + References No definition available. + Details
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- Definition AMPS Exchange Nominal Discount at Fair Value + References No definition available. + Details
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- Definition AMPS Exchange Supporting Holder Minimum Tender Commitment + References No definition available. + Details
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