Accumulated Other Comprehensive Income Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total Accumulated Other Comprehensive Loss, beginning balance	$ 1,181
Other Comprehensive Income (Loss), Net of Tax	(1,181)	$ 1,181	$ (2,256)
Total Accumulated Other Comprehensive Loss, ending balance	0	1,181
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total Accumulated Other Comprehensive Loss, beginning balance	1,181	0	2,256
Other Comprehensive Income (Loss), Net of Tax	(1,181)	1,181	(2,256)
Total Accumulated Other Comprehensive Loss, ending balance	0	1,181	0
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total Accumulated Other Comprehensive Loss, beginning balance	1,181	0	435
Other Comprehensive Income (Loss), Net of Tax	(1,181)	1,181	(435)
Total Accumulated Other Comprehensive Loss, ending balance	0	1,181	0
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total Accumulated Other Comprehensive Loss, beginning balance	0	0	1,821
Other Comprehensive Income (Loss), Net of Tax	0	0	(1,821)
Total Accumulated Other Comprehensive Loss, ending balance	$ 0	$ 0	$ 0