Accumulated Other Comprehensive Income Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total Accumulated Other Comprehensive Loss, beginning balance	$ 2,256
Other Comprehensive Income (Loss), Net of Tax	(2,256)	$ (693)	$ 7,837
Net Income (Loss) Attributable to Noncontrolling Interest	(53)	0	0
Total Accumulated Other Comprehensive Loss, ending balance	0	2,256
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total Accumulated Other Comprehensive Loss, beginning balance	2,256	2,949	(4,888)
Other Comprehensive Income (Loss), Net of Tax	(2,256)	(693)	7,837
Total Accumulated Other Comprehensive Loss, ending balance	0	2,256	2,949
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total Accumulated Other Comprehensive Loss, beginning balance	435	364	1,129
Other Comprehensive Income (Loss), Net of Tax	(435)	71	(765)
Total Accumulated Other Comprehensive Loss, ending balance	0	435	364
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	1,821	2,585	(6,017)
Other Comprehensive Income (Loss), Net of Tax	(1,821)	(764)	8,602
Total Accumulated Other Comprehensive Loss, ending balance	$ 0	$ 1,821	$ 2,585