Basis of Presentation and Significant Accounting Policies Supplemental Cash Flow information (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018	Aug. 03, 2018	Dec. 31, 2017
Non Cash Exchange of Puerto Rico Bonds	$ 510,215
Income Taxes Paid	11,387	$ 31,408
AMPS Exchange Carrying Value of Surplus Notes Issued				$ 187,220
Non Cash Impact of Rehabilitation Exit Transaction		1,918,561
Cash and cash equivalents	51,951	52,505	$ 63,089
Restricted Cash	12,561	0	19,405
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	67,680	53,529	83,493		$ 624,681
Long-term Debt [Member]
Interest Paid, Including Capitalized Interest, Operating and Investing Activities	109,527	195,333
Variable Interest Entity, Primary Beneficiary [Member]
Restricted Cash	$ 3,168	$ 1,024	$ 999