Subsequent Events (Details) (USD $)	1 Months Ended	12 Months Ended				1 Months Ended
	Dec. 31, 2012 Term Loan [Member]	Dec. 31, 2013 Term Loan [Member]	Feb. 18, 2014 Subsequent Event [Member]	Dec. 31, 2013 London Interbank Offered Rate (LIBOR) [Member] Term Loan [Member]	Feb. 24, 2014 Longtrain Leasing [Member] Subsequent Event [Member]	Jan. 31, 2014 Longtrain Leasing [Member] Loan Facility 2012 [Member] Subsequent Event [Member] Term Loan [Member]	Jan. 31, 2014 Longtrain Leasing [Member] Loan Facility 2014 [Member] Subsequent Event [Member] Term Loan [Member]	Jan. 31, 2014 Longtrain Leasing [Member] Loan Facility 2014 [Member] London Interbank Offered Rate (LIBOR) [Member] Subsequent Event [Member] Term Loan [Member]
Subsequent Event [Line Items]
Cash dividend declared by the Company			$ 0.40
Proceeds from Issuance of Secured Debt							$ 316,200,000
Refinance original lease fleet financing facility						194,200,000
Net proceeds from refinancing	98,400,000	99,400,000				122,000,000
Term loan facility additional borrowing capacity							100,000,000.0
Interest rate margin on loan				2.50%				2.00%
Carrying value of debt					$ 317,800,000