Commitments and Contingencies (Operating Lease Payments) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013 sqft
Operating Leased Assets [Line Items]
Aircraft hanger square feet	100,000
Cost of aircraft hanger	$ 15,700,000
Other Leases [Member]
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2013	22,561,000
2014	12,499,000
2015	8,807,000
2016	4,733,000
2017	3,113,000
2018 and beyond	1,533,000
Total minimum lease payments	53,246,000
Hanger Lease [Member]
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2013	592,000
2014	602,000
2015	832,000
2016	834,000
2017	833,000
2018 and beyond	14,610,000
Total minimum lease payments	$ 18,303,000
Boeing 767 Aircraft [Member]
Operating Leased Assets [Line Items]
Number of leased aircrafts	6