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Revenue Concentration	12 Months Ended
Revenue Concentration	Dec. 31, 2015
Revenue Concentration [Abstract]
Revenue Concentration	(18)Revenue Concentration Revenue from the Company’s ten largest lessees represented 51.9%, 55.4% and 56.6% of total revenue for the years ended December 31, 2015, 2014 and 2013, respectively. Revenue from the Company’s single largest lessee, CMA CGM, accounted for 11.6%, or $29.0 million, 11.4%, or $25.9 million, and 11.2%, or $23.8 million, of total revenue for the years ended December 31, 2015, 2014 and 2013, respectively.