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Revenue Concentration	12 Months Ended
Revenue Concentration	Dec. 31, 2016
Revenue Concentration [Abstract]
Revenue Concentration	(18)Revenue Concentration Revenue from the Company’s ten largest lessees represented 41.5%, 51.9% and 55.4% of total revenue for the years ended December 31, 2016, 2015 and 2014, respectively. Revenue from the Company’s single largest lessee, CMA CGM, accounted for 10.8%, or $31.7 million, 11.6%, or $29.0 million, and 11.4%, or $25.9 million, of total revenue for the years ended December 31, 2016, 2015 and 2014, respectively.