Income Taxes (Details 3) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Net operating losses
Alternative minimum tax credit without expiration	$ 17,649,000	$ 15,882,000
Valuation allowance on acquired non-amortizable intangible tax assets and other tax assets	3,044,000	1,614,000
ExpressJet
Net operating losses
Valuation allowance on acquired non-amortizable intangible tax assets and other tax assets	69,800,000	73,000,000
Deferred tax assets for net operating losses in states with short carry-forward periods	1,000,000
Federal
Net operating losses
Operating loss carryforward	191,500,000
State
Net operating losses
Operating loss carryforward	$ 651,200,000