Assets and Liabilities Measured at Fair Value (Details) (Recurring Fair Value Measurement [Member], USD $) In Thousands, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013
Asset:
Interest rate derivatives	$ 0	[1]	$ 18	[1]
Assets Held-for-sale, Long Lived, Fair Value Disclosure	2,925	[2]
Liabilities:
Interest rate derivatives	0	[1]	392	[1]
Level 1 [Member]
Asset:
Interest rate derivatives	0	[1]	0	[1]
Assets Held-for-sale, Long Lived, Fair Value Disclosure	0	[2]
Liabilities:
Interest rate derivatives	0	[1]	0	[1]
Level 2 [Member]
Asset:
Interest rate derivatives	0	[1]	18	[1]
Assets Held-for-sale, Long Lived, Fair Value Disclosure	2,925	[2]
Liabilities:
Interest rate derivatives	0	[1]	392	[1]
Level 3 [Member]
Asset:
Interest rate derivatives	0	[1]	0	[1]
Assets Held-for-sale, Long Lived, Fair Value Disclosure	0	[2]
Liabilities:
Interest rate derivatives	$ 0	[1]	$ 0	[1]

[1] The fair values of interest rate derivatives are the amount the Company would receive or pay to terminate the contracts, considering quoted market prices of comparable agreements. (Also see Note 8)

[2] (2)Represents the fair value, less costs to sell, of the Company aircraft