Seat Licenses And Other Intangible Assets (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Finite-Lived Intangible Assets [Line Items]
Purchase of seat licenses	$ 392,000	$ 700,000	$ 484,000
Seat Licenses [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization expense	500,000	300,000	100,000
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 800,000	$ 900,000	$ 400,000