Basis of Presentation and Significant Accounting Policies Supplemental Cash Flow information (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Non Cash Exchange of Puerto Rico Bonds	$ 510,215
Income Taxes Paid	852	$ 26,910
Non Cash Impact of Rehabilitation Exit Transaction	0	1,918,561
Cash and cash equivalents	17,514	44,398		$ 63,089
Restricted Cash	0		$ 0	19,405	$ 0
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	46,014	45,450		83,493		$ 624,681
Long-term Debt [Member]
Interest Paid, Including Capitalized Interest, Operating and Investing Activities	74,426	157,896
Variable Interest Entity, Primary Beneficiary [Member]
Restricted Cash	$ 28,500	$ 1,052		$ 999