Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Assets:
Fixed income securities, at fair value (amortized cost of $2,465,967 and $3,020,744)	$ 3,460,894
Short-term investments, at fair value (amortized cost of $772,214 and $430,405)	772,299	$ 430,331
Other investments	469,438	391,217
Total investments	3,930,332	3,937,223
Cash and cash equivalents	17,514	63,089
Restricted Cash	0	19,405
Premium receivables	441,526	495,391
Reinsurance recoverable on paid and unpaid losses	27,215	23,133
Deferred ceded premium	56,272	61,134
Subrogation recoverable	1,984,826	1,932,960
Derivative assets	72,376	59,468
Income Taxes Receivable	14,092	47,040
Insurance intangible asset	454,830	718,931
Other assets	190,566	137,628
Total assets	14,713,066	14,588,711
Liabilities:
Unearned premiums	556,908	629,971
Loss and loss expense reserves	1,494,106	1,826,078
Ceded premiums payable	30,795	32,913
Long-term debt	2,946,620	2,928,929
Accrued interest payable	407,096	375,808
Derivative Liability	88,245	76,699
Other liabilities	137,757	63,792
Total liabilities	13,160,150	12,955,564
Stockholders’ equity:
Preferred stock, par value $0.01 per share; 20,000,000 shares authorized; issued and outstanding shares—none	0	0
Common Stock, Value, Issued	456	454
Additional paid-in capital	226,794	219,429
Accumulated other comprehensive income	19,088	(48,715)
Retained earnings	1,246,990	1,421,302
Treasury stock, shares at cost: 0 and 8,202	(380)	(473)
Total Ambac Financial Group, Inc. stockholders’ equity	1,492,948	1,591,997
Noncontrolling interest	59,968	41,150
Total stockholders’ equity	1,552,916	1,633,147
Total liabilities and stockholders’ equity	14,713,066	14,588,711
Deferred Income Tax Liabilities, Net	31,716	40,130
Variable Interest Entity, Primary Beneficiary [Member]
Assets:
Fixed income securities, at fair value (amortized cost of $2,465,967 and $3,020,744)	3,138,714	2,737,286
Restricted Cash	28,500	999
Derivative assets	62,941	66,302
Other assets	4,790	1,058
Total assets	7,523,517	7,093,309
Liabilities:
Long-term debt	5,648,083	5,268,596
Accrued interest payable	529	556
Derivative Liability	1,818,273	1,712,062
Other liabilities	22	30
Total liabilities	7,466,907	6,981,244
Stockholders’ equity:
Financing Receivable, after Allowance for Credit Loss	$ 4,288,572	$ 4,287,664