Accumulated Other Comprehensive Income AOCI (Table) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017	Jun. 30, 2018	Jan. 01, 2018	Jun. 30, 2017	Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (37,166)		$ (37,166)		$ 3,852
Change in fair value of debt attributable to instrument-specific credit risk	658	$ 0
Other Comprehensive Income (Loss), Net of Tax	620	(2,498)	516	$ (3,754)
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent			528
Reclassification adjustment for amounts included in net loss	6	764	(5)	735
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	1,005		1,005		566
Other Comprehensive Income (Loss), Net of Tax			(479)
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(3,286)		(3,286)		(3,286)
Other Comprehensive Income (Loss), Net of Tax			0
Accumulated Net Investment Gain (Loss) Including Portion Attributable to Noncontrolling Interest [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	1,005	186	1,005	186		$ 967		$ (2,313)	$ (3,572)
Prior Period Reclassification Adjustment					40
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets							$ (526)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(44)	(3,263)	(474)	(4,493)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(6)	764	(5)	735
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax	(38)	(2,499)		(3,758)
Accumulated Foreign Currency Adjustment Including Portion Attributable to Noncontrolling Interest [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	3,286	3,780	3,286	3,780		3,286		3,780	3,780
Prior Period Reclassification Adjustment					0
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets							(3,286)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	0	0	0	0
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	0	0	0	0
Other Comprehensive Income (Loss), Net of Tax	0	0		0
Accumulated Gain (Loss), Financial Liability, Fair Value Option, Including Portion Attributable to Noncontrolling Interest [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(41,457)		(41,457)		0	(40,799)
Prior Period Reclassification Adjustment					40,455
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets							40,455
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax			1,002
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			0
Other Comprehensive Income (Loss), Net of Tax	658		1,002
Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(37,166)	3,966	(37,166)	3,966		$ (36,546)		$ 1,467	$ 208
Prior Period Reclassification Adjustment					$ 40,495
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets							$ 36,643
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	614	(3,263)		(4,493)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(6)	764		735
Other Comprehensive Income (Loss), Net of Tax	620	(2,499)		(3,758)
AOCI Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Net of Tax			523
Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	$ 3	$ 2	11	$ 4
Reclassification adjustment for amounts included in net loss			$ (5)