Accumulated Other Comprehensive Income Accumulated other comprehensive income (table) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, Unrealized Gain (Loss) Arising During Period, before Tax		$ 3,804	$ 0
Other Comprehensive Income, Other, Net of Tax		(45)	0
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ 3,852	(40,768)	3,852	$ 208
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent			(5,214)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, before Tax		0	494	0
Reclassification adjustment for amounts included in net loss		(18)	1,076
Other Comprehensive Income (Loss), Net of Tax		4,124	(3,643)
Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income, Other, Net of Tax		(45)
Accumulated Other Comprehensive Income (Loss), Net of Tax		45
Prior Period Reclassification Adjustment	0
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets	0		0
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, before Tax		0
AOCI Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	0		0	0
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent			0
Reclassification adjustment for amounts included in net loss			0
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	566		566	(3,572)
Other Comprehensive Income (Loss), Net of Tax			(4,138)
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)	3,780
Other Comprehensive Income (Loss), Net of Tax			494
Accumulated Gain (Loss), Financial Liability, Fair Value Option, Including Portion Attributable to Noncontrolling Interest [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax			0
Accumulated Other Comprehensive Income (Loss), Net of Tax	0	(44,259)	0	$ 0
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		40,455
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			0
Other Comprehensive Income (Loss), Net of Tax		3,804	0
Accumulated Net Investment Gain (Loss) Including Portion Attributable to Noncontrolling Interest [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax		13	(5,214)
Accumulated Other Comprehensive Income (Loss), Net of Tax	160		160
Prior Period Reclassification Adjustment	40
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets	(526)		(526)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax		(18)	(1,076)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, before Tax		371
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax		366
Accumulated Foreign Currency Adjustment Including Portion Attributable to Noncontrolling Interest [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax		0	0
Accumulated Other Comprehensive Income (Loss), Net of Tax	3,286		3,286
Prior Period Reclassification Adjustment			0
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets	(3,286)		(3,286)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax		0	(494)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, before Tax		0
Other Comprehensive Income (Loss), Net of Tax		0
AOCI Including Portion Attributable to Noncontrolling Interest [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax		3,772
Accumulated Other Comprehensive Income (Loss), Net of Tax	(40,768)		(40,768)
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		36,643
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax		(18)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, before Tax		371
Other Comprehensive Income (Loss), Net of Tax		4,125
AOCI Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Net of Tax		$ 4,125	(3,644)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification adjustment for amounts included in net loss			$ 1,570