Discontinued Operations (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Discontinued operations including amounts of operating revenue and income (loss) before income taxes [Abstract]
Operating revenues	$ 0	$ 1,091	$ 10,516
Loss before income taxes	$ 0	$ (496)	$ (904)