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Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Fair Value
Debt Instrument, Unamortized Discount (Premium), Net	$ 4,971		$ 5,293
Liabilities
Deferred financing costs	(43,684)		(44,889)
Adjustment to Purchase Price of Debt	14,252		16,308
Cash Collateral for Interest Rate Swap Contracts	1,300
Asset Impairment (Charges) Reversal, Net	(1,400)	$ 900
Fair value of derivative instruments (assets)	4,580		13,923
Fair value of derivative instruments (liabilities)	19,487		10,966
Level 2
Liabilities
Assets Held-for-sale, Impairment Charges	(2,501)		(1,846)
Carrying Value
Liabilities
Debt and Capital Lease Obligations	7,427,632		7,595,922
Estimate of Fair Value | Level 2
Liabilities
Debt and Capital Lease Obligations	7,466,058		7,559,063
Carrying value containers impaired to fair value [Member] | Level 2
Liabilities
Assets Held-for-sale, Long Lived, Fair Value Disclosure	8,429		5,750
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Liabilities
Fair value of derivative instruments (assets)	2,173		10,531
Fair value of derivative instruments (liabilities)	19,487		10,966
Not Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Liabilities
Fair value of derivative instruments (assets)	2,407		3,392
Fair value of derivative instruments (liabilities)	$ 0		$ 0

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