Long-Term Debt (Tables)

12 Months Ended

Dec. 31, 2017

Debt Disclosure [Abstract]

Schedule of Long-term Debt Instruments

The carrying value of long-term debt was as follows:

December 31,	2017		2016
Ambac Assurance:
5.1% surplus notes, general account, due 2020	$	668,667	$	730,648
5.1% surplus notes, segregated account, due 2020	—		33,107
5.1% junior surplus notes, segregated account, due 2020	249,036		248,247
Secured borrowing	73,993		102,403
Ambac Assurance long-term debt	$	991,696	$	1,114,405
Variable Interest Entities long-term debt	$	12,160,544	$	11,155,936