Accumulated Other Comprehensive Income Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total Accumulated Other Comprehensive Loss, beginning balance	$ (5,088)
Other Comprehensive Income (Loss), Net of Tax	200	(3,203)	(5,104)
Total Accumulated Other Comprehensive Loss, ending balance	(4,888)	(5,088)
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total Accumulated Other Comprehensive Loss, beginning balance	(5,088)	(1,885)	3,219
Other Comprehensive Income (Loss), Net of Tax	200	(3,203)	(5,104)
Total Accumulated Other Comprehensive Loss, ending balance	(4,888)	(5,088)	(1,885)
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total Accumulated Other Comprehensive Loss, beginning balance	7	29	(1)
Other Comprehensive Income (Loss), Net of Tax	1,122	(22)	30
Total Accumulated Other Comprehensive Loss, ending balance	1,129	7	29
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	(5,095)	(1,914)	3,220
Other Comprehensive Income (Loss), Net of Tax	(922)	(3,181)	(5,134)
Total Accumulated Other Comprehensive Loss, ending balance	$ (6,017)	$ (5,095)	$ (1,914)