Seat Licenses And Other Intangible Assets (Components Of Other Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Gross Value	$ 7,895	$ 7,879
Accumulated Amortization	(2,875)	(2,023)
Net Value	5,020	5,856
Seat Licenses [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Lives	5 years
Gross Value	2,936	2,606
Accumulated Amortization	(1,393)	(857)
Net Value	1,543	1,749
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Lives	8 years	8 years
Gross Value	5,400	5,400
Accumulated Amortization	(2,306)	(1,631)
Net Value	3,094	3,769
Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Lives	15 years	15 years
Gross Value	2,400	2,400
Accumulated Amortization	(547)	(387)
Net Value	1,853	2,013
Website [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Lives	12 years	12 years
Gross Value	95	79
Accumulated Amortization	(22)	(5)
Net Value	$ 73	$ 74
Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Lives	15 years
Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Lives	3 years