Seaspan (SESCF) 20-F 26 Mar 19 2018 FY Annual report (foreign) Financial data

Document and Entity Information

Document and Entity Information - shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Document Information [Line Items]
Document Type	20-F
Amendment Flag	false
Document Period End Date	Dec. 31, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	FY
Trading Symbol	SSW
Entity Registrant Name	Seaspan CORP
Entity Central Index Key	0001332639
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding	176,871,891
Entity Preferred Stock, Shares Outstanding	33,272,706	32,872,706
Series D Preferred Shares [Member]
Document Information [Line Items]
Entity Preferred Stock, Shares Outstanding	7,017,313
Series E Preferred Shares [Member]
Document Information [Line Items]
Entity Preferred Stock, Shares Outstanding	5,415,937
Series G Preferred Shares [Member]
Document Information [Line Items]
Entity Preferred Stock, Shares Outstanding	7,800,800
Series H Preferred Shares [Member]
Document Information [Line Items]
Entity Preferred Stock, Shares Outstanding	9,025,105
Series I Preferred Stock [Member]
Document Information [Line Items]
Entity Preferred Stock, Shares Outstanding	6,000,000

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 357,327	$ 253,176
Short-term investments	2,532	104
Accounts receivable (note 4)	13,001	11,678
Loans to affiliate (note 4)	0	36,100
Prepaid expenses and other	36,519	44,869
Gross investment in lease (note 5)	44,348	35,478
Fair value of financial instruments (note 18(c))	113	0
Total current assets	453,840	381,405
Vessels (note 6)	5,926,274	4,537,216
Gross investment in lease (note 5)	817,631	687,896
Goodwill	75,321	75,321
Other assets (note 7)	204,931	196,304
Total assets	7,477,997	5,878,142
Current liabilities:
Accounts payable and accrued liabilities (note 15(a))	70,211	63,220
Current portion of deferred revenue (note 8)	55,915	55,367
Current portion of long-term debt (note 9)	722,641	257,800
Current portion of long-term obligations under capital lease (note 10)	48,384	43,912
Current portion of other long-term liabilities (note 11)	32,243	23,635
Total current liabilities	929,394	443,934
Deferred revenue (note 8)	376,884	328,681
Long-term debt (note 9)	2,764,900	2,192,833
Long-term obligations under capital lease (note 10)	591,372	595,016
Other long-term liabilities (note 11)	180,157	199,386
Fair value of financial instruments (note 18(c))	127,172	168,860
Total liabilities	4,969,879	3,928,710
Puttable preferred shares; $0.01 par value; 1,986,449 issued and outstanding (2017 - nil) (notes 3 and 12)	48,139	0
Share capital (note 12):
Preferred shares; $0.01 par value; 150,000,000 shares authorized (2017 – 150,000,000); 33,272,706 shares issued and outstanding (2017 – 32,872,706)	0	0
Class A common shares; $0.01 par value; 400,000,000 shares authorized (2017 – 200,000,000); 176,835,837 shares issued and outstanding (2017 – 131,664,101)	2,102	1,646
Treasury shares	(371)	(377)
Additional paid in capital	3,126,457	2,752,988
Deficit	(645,638)	(781,137)
Accumulated other comprehensive loss	(22,571)	(23,688)
Total shareholders' equity	2,459,979	1,949,432
Total liabilities and shareholders' equity	7,477,997	5,878,142
Commitments and contingencies (note 16)	0	0
Subsequent events (note 20)	$ 0	$ 0

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2018	Dec. 31, 2017
Puttable preferred shares, par value	$ 0.01	$ 0.01
Puttable preferred shares, issued	1,986,449	0
Puttable preferred shares, outstanding	1,986,449	0
Preferred shares, par value	$ 0.01	$ 0.01
Preferred shares, authorized	150,000,000	150,000,000
Preferred shares, issued	33,272,706	32,872,706
Preferred shares, outstanding	33,272,706	32,872,706
Class A Common Shares [Member]
Common shares, par value	$ 0.01	$ 0.01
Common shares, authorized	400,000,000	200,000,000
Common shares, issued	176,835,837	131,664,101
Common shares, outstanding	176,835,837	131,664,101

Consolidated Statements of Oper

Consolidated Statements of Operations (Unaudited) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Statement [Abstract]
Revenue	$ 1,096,331,000	$ 831,324,000	$ 877,905,000
Operating expenses:
Ship operating	219,270,000	183,916,000	192,327,000
Cost of services, supervision fees	0	1,300,000	7,390,000
Depreciation and amortization	245,801,000	199,938,000	216,098,000
General and administrative	31,565,000	40,091,000	32,118,000
Operating leases (note 11)	129,747,000	115,544,000	85,910,000
Loss (gain) on disposals (note 6)	0	(13,604,000)	31,876,000
Expenses related to customer bankruptcy	0	1,013,000	19,732,000
Vessel impairments	0	0	285,195,000
Total operating expenses	626,383,000	528,198,000	870,646,000
Operating earnings	469,948,000	303,126,000	7,259,000
Other expenses (income):
Interest expense and amortization of deferred financing fees	212,065,000	116,389,000	119,882,000
Interest income	(4,197,000)	(4,558,000)	(8,455,000)
Refinancing expenses	0	0	1,962,000
Acquisition related gain on contract settlement	(2,430,000)	0	0
Change in fair value of financial instruments (note 18(c))	(15,490,000)	12,631,000	29,118,000
Equity income on investment (note 7)	(1,216,000)	(5,835,000)	(188,000)
Other expense	2,418,000	9,262,000	3,979,000
Total other expenses (income)	191,150,000	127,889,000	146,298,000
Net earnings (loss)	$ 278,798,000	$ 175,237,000	$ (139,039,000)
Earnings (loss) per share (note 13):
Class A common share, basic	$ 1.34	$ 0.94	$ (1.89)
Class A common share, diluted	$ 1.31	$ 0.94	$ (1.89)

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement Of Income And Comprehensive Income [Abstract]
Net earnings (loss)	$ 278,798	$ 175,237	$ (139,039)
Other comprehensive income:
Amounts reclassified to net earnings during the year relating to cash flow hedging instruments (note 18(c))	1,117	2,859	4,373
Comprehensive income (loss)	$ 279,915	$ 178,096	$ (134,666)

Consolidated Statements of Putt

Consolidated Statements of Puttable Preferred Shares and Shareholders' Equity - USD ($) $ in Thousands	Total	Series D Puttable Preferred Shares [Member]	Class A Common Shares [Member]	Series F Preferred Shares [Member]	Series G Preferred Shares [Member]	Series H Preferred Shares [Member]	Series I Preferred Stock [Member]	Common Shares [Member]	Common Shares [Member]Class A Common Shares [Member]	Non-puttable Preferred Shares [Member]	Non-puttable Preferred Shares [Member]Series F Preferred Shares [Member]	Non-puttable Preferred Shares [Member]Series G Preferred Shares [Member]	Non-puttable Preferred Shares [Member]Series H Preferred Shares [Member]	Non-puttable Preferred Shares [Member]Series I Preferred Stock [Member]	Treasury Shares [Member]	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member]Class A Common Shares [Member]	Additional Paid-in Capital [Member]Series F Preferred Shares [Member]	Additional Paid-in Capital [Member]Series G Preferred Shares [Member]	Additional Paid-in Capital [Member]Series H Preferred Shares [Member]	Additional Paid-in Capital [Member]Series I Preferred Stock [Member]	Deficit [Member]	Accumulated Other Comprehensive Loss [Member]
Balance at Dec. 31, 2015	$ 1,776,183							$ 986		$ 237					$ (356)	$ 2,266,661						$ (460,425)	$ (30,920)
Balance, shares at Dec. 31, 2015								98,622,160		23,673,403
Net earnings (loss)	(139,039)																					(139,039)
Other comprehensive income	4,373																						4,373
Shares issued, value			$ 99,525	$ 140,000	$ 194,544	$ 225,000			$ 68		$ 56	$ 78	$ 90				$ 99,457	$ 139,944	$ 194,466	$ 224,910
Shares issued, shares									6,770,408		5,600,000	7,800,000	9,000,000
Fees and expenses in connection with issuance of common and preferred shares	(21,797)															(21,797)
Dividends on Class A common shares	(152,915)																					(152,915)
Dividends on preferred shares	(53,630)																					(53,630)
Amortization of Series C preferred share issuance costs																116						(116)
Shares issued through dividend reinvestment program	4,359							$ 3								4,356
Shares issued through dividend reinvestment program, shares								286,009
Share-based compensation expense (note 14):
Restricted Class A common shares, phantom share units, stock appreciation rights issued and restricted stock units	6,228							$ 2								6,226
Restricted Class A common shares, phantom share units, stock appreciation rights issued and restricted stock units, shares								164,235
Other share-based compensation	5,772							$ 4								7,139						(1,371)
Other share-based compensation, shares								446,643
Common shares repurchased, including related expenses	(8,269)							$ (6)								(8,263)
Common stock repurchased including related expenses, shares								(564,270)
Redemption of preferred shares including related expenses	(333,074)									$ (133)						(332,941)
Redemption of preferred shares including related expenses, shares										(13,321,774)
Treasury shares, value	(11)														(11)
Treasury shares								(2,539)
Balance at Dec. 31, 2016	1,747,249							$ 1,057		$ 328					(367)	2,580,274						(807,496)	(26,547)
Balance, shares at Dec. 31, 2016								105,722,646		32,751,629
Net earnings (loss)	175,237																					175,237
Other comprehensive income	2,859																						2,859
Shares issued, value	2,957		121,348						$ 196	$ 1						2,956	121,152
Shares issued, shares									19,550,000	121,077
Fees and expenses in connection with issuance of common and preferred shares	(2,649)															(2,649)
Dividends on Class A common shares	(83,615)																					(83,615)
Dividends on preferred shares	(64,416)																					(64,416)
Shares issued through dividend reinvestment program	21,785							$ 33								21,752
Shares issued through dividend reinvestment program, shares								3,300,537
Share-based compensation expense (note 14):
Restricted Class A common shares, phantom share units, stock appreciation rights issued and restricted stock units	17,320							$ 13								17,307
Restricted Class A common shares, phantom share units, stock appreciation rights issued and restricted stock units, shares								1,246,604
Other share-based compensation	11,367							$ 18								12,196						(847)
Other share-based compensation, shares								1,846,892
Treasury shares, value	(10)														(10)
Treasury shares								(2,578)
Puttable preferred shares, Balance at Dec. 31, 2017	$ 0
Puttable preferred shares Balance, Shares at Dec. 31, 2017	0
Balance at Dec. 31, 2017	$ 1,949,432							$ 1,317		$ 329					(377)	2,752,988						(781,137)	(23,688)
Balance, shares at Dec. 31, 2017								131,664,101		32,872,706
Net earnings (loss)	278,798																					278,798
Other comprehensive income	1,117																						1,117
Shares issued, value			$ 13,908				$ 150,000		$ 25					$ 60			$ 13,883				$ 149,940
Shares issued, shares								0	2,514,996					6,000,000
Preferred shares issued		$ 46,676
Preferred shares issued, shares		1,986,449
Warrants issued (note 12(c))	67,523															67,523
Exercise of warrants (note 12(c))	328,563							$ 385								328,178
Exercise of warrants (note 12(c)), shares								38,461,539
Fees and expenses in connection with issuance of common and preferred shares	(74,339)															(74,339)
Dividends on Class A common shares	(72,744)																					(72,744)
Dividends on preferred shares	(68,712)																					(68,712)
Puttable preferred shares accretion of preferred shares with holder put option		$ 1,463
Accretion of preferred shares with holder put option	(1,463)																					(1,463)
Shares issued through dividend reinvestment program	22,807							$ 30								22,777
Shares issued through dividend reinvestment program, shares								2,986,159
Share-based compensation expense (note 14):
Restricted Class A common shares, phantom share units, stock appreciation rights issued and restricted stock units	3,134							$ 3								3,131
Restricted Class A common shares, phantom share units, stock appreciation rights issued and restricted stock units, shares								325,221
Other share-based compensation	1,949							$ 9								2,320						(380)
Other share-based compensation, shares								890,927
Redemption of preferred shares including related expenses	(140,000)									$ (56)						(139,944)
Redemption of preferred shares including related expenses, shares										(5,600,000)
Treasury shares, value	6														6
Treasury shares								(7,106)
Puttable preferred shares, Balance at Dec. 31, 2018	$ 48,139	$ 48,139
Puttable preferred shares Balance, Shares at Dec. 31, 2018	1,986,449	1,986,449
Balance at Dec. 31, 2018	$ 2,459,979							$ 1,769		$ 333					$ (371)	$ 3,126,457						$ (645,638)	$ (22,571)
Balance, shares at Dec. 31, 2018								176,835,837		33,272,706

Consolidated Statements of Pu_2

Consolidated Statements of Puttable Preferred Shares and Shareholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Class A Common Shares [Member]
Dividends per common share	$ 0.50	$ 0.75	$ 1.50
Series C Preferred Shares [Member]
Dividends per preferred share			1.19
Series D Preferred Shares [Member]
Dividends per preferred share	1.99	1.99	1.99
Series E Preferred Shares [Member]
Dividends per preferred share	2.06	2.06	2.06
Series F Preferred Shares [Member]
Dividends per preferred share	1.77	1.74	0.79
Series G Preferred Shares [Member]
Dividends per preferred share	2.05	2.05	0.76
Series H Preferred Shares [Member]
Dividends per preferred share	1.97	$ 1.97	$ 0.43
Series I Preferred Stock [Member]
Dividends per preferred share	$ 0.23

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Operating activities:
Net earnings (loss)	$ 278,798,000	$ 175,237,000	$ (139,039,000)
Items not involving cash:
Depreciation and amortization	245,801,000	199,938,000	216,098,000
Share-based compensation (note 14)	3,134,000	17,526,000	6,378,000
Amortization of deferred financing fees, debt discount and fair value of long-term debt	19,947,000	11,899,000	14,181,000
Amounts reclassified from other comprehensive loss to interest expense (note 18(c))	333,000	1,927,000	3,407,000
Unrealized change in fair value of financial instruments	(57,445,000)	(44,060,000)	(53,998,000)
Acquisition related gain on contract settlement	(2,430,000)	0	0
Equity income on investment (note 7)	(1,216,000)	(5,835,000)	(188,000)
Refinancing expenses and recoveries	0	0	1,677,000
Operating leases (note 11)	(23,594,000)	(22,589,000)	(19,003,000)
Amortization of acquired revenue contracts	8,117,000	4,511,000	3,273,000
Vessel impairments	0	0	285,195,000
Expenses related to customer bankruptcy	0	0	18,883,000
Loss (gain) on disposals	0	(13,604,000)	31,876,000
Other	16,000	6,690,000	34,000
Changes in assets and liabilities:
Accounts receivable	15,495,000	16,584,000	(21,711,000)
Lease receivable	44,275,000	8,141,000	17,783,000
Prepaid expenses and other	17,457,000	(11,223,000)	2,108,000
Deferred dry-dock	(10,264,000)	(8,709,000)	(20,741,000)
Accounts payable and accrued liabilities	(8,288,000)	2,270,000	(8,693,000)
Deferred revenue	(46,806,000)	(7,377,000)	4,778,000
Other long-term liabilities	(1,470,000)	0	0
Fair value of financial instruments	1,991,000	(8,107,000)	(31,211,000)
Cash from operating activities	483,851,000	323,219,000	311,087,000
Financing activities:
Preferred shares issued, net of issuance costs (note 12(b))	144,375,000	2,690,000	541,694,000
Common shares issued, net of issuance costs (note 12(a))	0	118,966,000	95,978,000
Draws on credit facilities	325,600,000	0	220,485,000
Repayment of credit facilities	(469,662,000)	(455,005,000)	(704,291,000)
2025 Notes and 2018 Warrants issued	250,000,000	0	0
Senior unsecured notes issued (note 9)	0	80,000,000	0
Senior unsecured notes repurchased, including related expenses	(17,529,000)	(7,075,000)	0
Draws on long-term obligations under capital lease	46,964,000	176,254,000	180,750,000
Repayment of long-term obligations under capital lease	(48,140,000)	(26,198,000)	(24,733,000)
Common shares repurchased, including related expenses	0	0	(8,269,000)
Preferred shares redeemed, including related expenses	(143,430,000)	0	(333,074,000)
Proceeds from exercise of 2018 Warrants	250,000,000	0	0
Financing fees	(16,122,000)	(8,226,000)	(12,992,000)
Dividends on common shares	(49,937,000)	(61,830,000)	(148,556,000)
Dividends on preferred shares	(65,765,000)	(64,416,000)	(54,085,000)
Proceeds from sale-leaseback of vessels	0	90,753,000	354,000,000
Cash from (used in) financing activities	206,354,000	(154,087,000)	106,907,000
Investing activities:
Expenditures for vessels	(318,740,000)	(338,518,000)	(343,552,000)
Short-term investments	(2,428,000)	307,000	3,004,000
Net proceeds from vessel disposals	0	37,091,000	12,078,000
Proceeds from sale of leased vessels	0	0	20,000,000
Loans to affiliate (note 4)	0	(2,677,000)	(18,096,000)
Repayment of loans to affiliate (note 4)	0	22,325,000	67,831,000
Other assets	(1,417,000)	(2,384,000)	(6,677,000)
Acquisition of GCI (note 3)	(333,581,000)	0	0
Cash acquired from GCI acquisition (note 3)	70,121,000	0	0
Cash used in investing activities	(586,045,000)	(283,856,000)	(265,412,000)
Increase (decrease) in cash and cash equivalents	104,160,000	(114,724,000)	152,582,000
Cash and cash equivalents and restricted cash, beginning of year	267,236,000	381,960,000	229,378,000
Cash and cash equivalents and restricted cash, end of year	$ 371,396,000	$ 267,236,000	$ 381,960,000

General

General	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
General	Seaspan Corporation (the “Company”) was incorporated on May 3, 2005 in the Marshall Islands and owns and operates containerships pursuant to primarily long-term, fixed-rate time charters to major container liner companies.

Significant accounting policies

Significant accounting policies	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Significant accounting policies	2. Significant accounting policies: (a) Basis of presentation: These consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America and the following accounting policies have been consistently applied in the preparation of the consolidated financial statements. At December 31, 2018, the Company had a working capital deficiency of $475,554,000 which included $320,396,000 of senior unsecured notes maturing in April 2019. This deficit was fully funded in January 2019 by aggregate proceeds of $500,000,000, received on issuance of $250,000,000 in debentures and warrants to purchase 38,461,539 Class A common shares at $6.50 per share, which were immediately exercised. (b) Principles of consolidation: The accompanying consolidated financial statements include the accounts of Seaspan Corporation and its wholly-owned subsidiaries. All significant intercompany balances and transactions have been eliminated upon consolidation. The Company also consolidates any variable interest entities (“VIEs”) of which it is the primary beneficiary. The primary beneficiary is the enterprise that has both the power to make decisions that most significantly affect the economic performance of the VIE and has the right to receive benefits or the obligation to absorb losses that in either case could potentially be significant to the VIE. The impact of the consolidation of these VIEs is described in note 10. The Company accounts for its investment in companies in which it has significant influence by the equity method. The Company’s proportionate share of earnings is included in earnings and added to or deducted from the cost of the investment. (c) Foreign currency translation: The functional and reporting currency of the Company is the United States dollar. Transactions involving other currencies are converted into United States dollars using the exchange rates in effect at the time of the transactions. At the balance sheet date, monetary assets and liabilities that are denominated in currencies other than the United States dollar are translated into United States dollars using exchange rates at that date. Exchange gains and losses are included in net earnings. (d) Cash equivalents: Cash equivalents include highly liquid securities with terms to maturity of three months or less when acquired. (e) Vessels: Except as described below, vessels are recorded at their cost, which consists of the purchase price, acquisition and delivery costs, less accumulated depreciation. Vessels purchased from the Company’s predecessor upon completion of the Company’s initial public offering in 2005 were initially recorded at the predecessor’s carrying value. Vessels under construction include deposits, installment payments, interest, financing costs, transaction fees, construction design, supervision costs, and other pre-delivery costs incurred during the construction period. Depreciation is calculated on a straight-line basis over the estimated useful life of each vessel, which is 30 years from the date of completion. The Company calculates depreciation based on the estimated remaining useful life and the expected salvage value of the vessel. Vessels that are held for use are evaluated for impairment when events or circumstances indicate that their carrying amounts may not be recoverable from future undiscounted cash flows. Such evaluations include the comparison of current and anticipated operating cash flows, assessment of future operations and other relevant factors. If the carrying amount of the vessel exceeds the estimated net undiscounted future cash flows expected to be generated over the vessel’s remaining useful life, the carrying amount of the vessel is reduced to its estimated fair value. (f) Dry-dock activities: Classification rules require that vessels be dry-docked for inspection including planned major maintenance and overhaul activities for ongoing certification. The Company generally dry-docks its vessels once every five years. Dry-docking activities include the inspection, refurbishment and replacement of steel, engine components, electrical, pipes and valves, and other parts of the vessel. The Company uses the deferral method of accounting for dry-dock activities whereby capital costs incurred are deferred and amortized on a straight-line basis over the period until the next scheduled dry-dock activity. (g) Goodwill: Goodwill represents the excess of the purchase price of an acquired enterprise over the fair value assigned to assets acquired and liabilities assumed in a business combination. Goodwill is not amortized, but reviewed for impairment annually or more frequently if impairment indicators arise. When goodwill is reviewed for impairment, the Company may elect to assess qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount, including goodwill. Alternatively, the Company may bypass this step and use a fair value approach to identify potential goodwill impairment and, when necessary, measure the amount of impairment. The Company uses a discounted cash flow model to determine the fair value of reporting units, unless there is a readily determinable fair market value. (h) Deferred financing fees: Deferred financing fees represent the unamortized costs incurred on issuance of the Company’s credit and lease arrangements and are presented as a direct deduction from the related debt liability when available. Amortization of deferred financing fees on credit facilities is provided on the effective interest rate method over the term of the facility based on amounts available under the facilities. Amortization of deferred financing fees on long-term obligations under capital leases is provided on the effective interest rate method over the term of the underlying obligation and amortization of deferred financing fees on operating leases is provided on a straight line basis over the lease term. Amortization of deferred financing fees is recorded as interest expense. ( i ) Revenue recognition: The Company derives its revenue primarily from the charter of its vessels. Each charter agreement is evaluated and classified as an operating or capital lease. For time charters classified as operating leases, revenue for the lease and service components is recognized each day the vessel is on-hire and performance obligations are satisfied. For capital leases that are sales-type leases, the difference between the gross investment in the lease and the present value of its components, i.e. the minimum lease payments and the estimated residual value, is recorded as unearned lease interest income. The discount rate used in determining the present values is the interest rate implicit in the lease. The present value of the minimum lease payments, computed using the interest rate implicit in the lease, is recorded as the sales price, from which the carrying value of the vessel at the commencement of the lease is deducted in order to determine the profit or loss on sale. Unearned lease interest income is amortized to income over the period of the lease so as to produce a constant periodic rate of return on the net investment in lease. Revenue from vessel management is recognized each day the vessel is managed, when services are provided and the performance obligations are satisfied. (j) Leases: Leases, where the Company is the lessee, are classified as either capital leases or operating leases based on an assessment of the terms of the lease. For sale-leaseback transactions, the Company, as seller-lessee, would recognize a gain or loss over the term of the lease as an adjustment to the lease expense, unless the loss is required to be recognized immediately by accounting standards. The term of the lease includes the fixed non-cancelable term of the lease plus all renewal periods where that renewal appears reasonably assured. (k) Derivative financial instruments: From time to time, the Company utilizes derivative financial instruments. All of the Company’s derivatives are measured at their fair value at the end of each period. Derivatives that mature within one year are classified as current. For derivatives not designated as accounting hedges, changes in their fair value are recorded in earnings. The Company’s hedging policies permit the use of various derivative financial instruments to manage interest rate risk. The Company has entered into interest rate swaps and swaptions to reduce the Company’s exposure to changing interest rates on its credit facilities. The Company had previously designated certain of its interest rate swaps as accounting hedges and applied hedge accounting to those instruments. While hedge accounting was applied, the effective portion of the unrealized gains or losses on those designated interest rate swaps was recorded in other comprehensive loss. By September 30, 2008, the Company de-designated all of the interest rate swaps it had accounted for as hedges to that date. Subsequent to their de-designation dates, changes in their fair value are recorded in earnings. The Company evaluates whether the occurrence of any of the previously hedged interest payments are considered to be remote. When the previously hedged interest payments are not considered remote of occurring, unrealized gains or losses in accumulated other comprehensive income associated with the previously designated interest rate swaps are recognized in earnings when and where the interest payments are recognized. If such interest payments are identified as being remote, the accumulated other comprehensive income balance pertaining to these amounts is reversed through earnings immediately. (l) Fair value measurement: Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability (i.e. the “exit price”) in an orderly transaction between market participants at the measurement date. The hierarchy is broken down into three levels based on the observability of inputs as follows: • Level 1 — Valuations based on quoted prices in active markets for identical assets or liabilities that the Company has the ability to access. Valuation adjustments and block discounts are not applied to Level 1 instruments. Since valuations are based on quoted prices that are readily and regularly available in an active market, valuation of these products does not entail a significant degree of judgment. • Level 2 — Valuations based on one or more quoted prices in markets that are not active or for which all significant inputs are observable, either directly or indirectly. • Level 3 — Valuations based on inputs that are unobservable and significant to the overall fair value measurement. (m) Share-based compensation: The Company has granted restricted shares, phantom share units, performance share units, SARs, restricted stock units and stock options to certain of its officers, members of management and directors as compensation. Compensation cost is measured at the grant date fair values as follows: • Restricted shares, phantom share units and restricted stock units are measured based on the quoted market price of the Company’s Class A common shares on the date of the grant. • SARs and performance share units are measured at fair value using the Monte Carlo model. • Stock options are measured at fair value using the Black-Scholes model. The fair value of each grant is recognized on a straight-line basis over the requisite service period. The Company accounts for forfeitures in share-based compensation expense as they occur. (n) Earnings per share: The treasury stock method is used to compute the dilutive effect of the Company’s share-based compensation awards. Under this method, the incremental number of shares used in computing diluted earnings per share (“EPS”) is the difference between the number of shares assumed issued and purchased using assumed proceeds. The if-converted method is used to compute the dilutive effect of the Company’s convertible preferred shares. Under the if-converted method, dividends applicable to the convertible preferred shares are added back to earnings attributable to common shareholders, and the convertible preferred shares and paid-in kind dividends are assumed to have been converted at the share price applicable at the end of the period. The if-converted method is applied to the computation of diluted EPS only if the effect is dilutive. The cumulative dividends applicable to the Series D, E, F, G, H and I preferred shares reduce the earnings available to common shareholders, even if not declared. (o) Use of estimates: The preparation of consolidated financial statements requires management to make estimates and assumptions that affect the: • reported amounts of assets and liabilities, • disclosure of contingent assets and liabilities at the balance sheet dates and • reported amounts of revenue and expenses during the reporting fiscal periods. Areas where accounting judgments and estimates are significant to the Company and where actual results could differ from those estimates, include the: • assessment of going concern; • assessment of vessel useful lives; • expected vessel salvage values; • recoverability of the carrying value of vessels which are subject to future market events; • carrying value of goodwill; and • fair value of interest rate swaps, other derivative financial instruments and share-based awards. (p) Comparative information: Certain information has been reclassified to conform to the financial statement presentation adopted for the current year. (q) Recently adopted accounting pronouncements: Revenue from Contracts with Customers Effective January 1, 2018, the Company adopted Accounting Standards Update (“ASU”) 2014-09, “Revenue from Contracts with Customers”, that introduced a new five-step revenue recognition model to determine how an entity should recognize revenue related to the transfer of goods or services to customers in an amount that reflects the consideration the entity is entitled to receive for those goods or services. The Company’s revenue is comprised primarily of time charter revenue and interest income from leasing. The time charter revenue includes a lease element, which is evaluated under Accounting Standards Codification (“ASC”) 840 “Leases”, and a service element, which is evaluated under ASU 2014-09. Under previous accounting standards, service revenue was recognized when the amounts were fixed or determinable, services had been rendered and collectability was reasonably assured. Under ASU 2014-09, recognition of such service revenue occurs when the services are provided and the performance obligations are satisfied. The Company evaluated the service revenue under ASU 2014-09 and determined that the amounts recognized and the pattern of recognition are substantially the same as under the previous revenue standard. The Company adopted ASU 2014-09 using the modified retrospective method and applied the new standard only to contracts not completed as of January 1, 2018. There is no impact on the Company’s consolidated financial statements. Definition of a Business Effective January 1, 2018, the Company adopted ASU 2017-01, “Clarifying the Definition of a Business”, which provides a new framework for determining whether transactions should be accounted for as acquisitions of assets or businesses. The Company analyzed its March 13, 2018 acquisition of Greater China Intermodal Investments LLC (“GCI”) under this standard (see note 3). Statement of Cash Flows – Restricted cash Effective January 1, 2018, the Company adopted ASU 2016-18, “Statement of Cash Flows – Restricted Cash”, which requires that a statement of cash flows explain the change during the period in cash, cash equivalents and restricted cash. In addition, the amounts of restricted cash and nature of the restrictions are required to be disclosed. The Company’s consolidated statements of cash flows and supplemental cash flow note reflect the changes as required. Equity-Linked Financial Instruments with Down Round Features Effective January 1, 2018, the Company elected to early adopt ASU 2017-11, “Earnings Per Share”, which changes the classification analysis of certain equity-linked financial instruments with down round features. When determining whether certain financial instruments should be classified as liabilities or equity instruments, a down round feature no longer precludes equity classification when assessing whether the instrument is indexed to an entity’s own stock. The standard is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018, with early adoption permitted. There is no impact on the Company’s consolidated financial statements. (r) Recent accounting pronouncements: Leases In February 2016, the Financial Accounting Standards Board (“FASB”) issued ASU 2016-02, “Leases”, which requires lessees to recognize all rights and obligations created by those leases, including operating leases, with a term greater than 12 months on the balance sheet. The accounting for lessors will remain largely unchanged from the existing accounting standards. The standard is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Under ASU 2016-02, each lease agreement will be evaluated to identify the lease components and non-lease components at lease inception. The total consideration in the lease agreement will be allocated to the lease and non-lease components based on their relative standalone selling prices. Lessors will continue to recognize the lease revenue component using an approach that is substantially equivalent to existing guidance for operating leases (straight-line basis). In July 2018, the FASB issued ASU 2018-11, “Leases – Targeted Improvements” that allows lessors to elect, as a practical expedient, to not separate lease and non-lease components and allows these components to be accounted for as a single lease component if both (1) the timing and pattern of transfer to the lessee of the lease component and the related non-lease component are the same and (2) the lease component, if accounted for separately, would be classified as an operating lease. In addition, a company is permitted to use its effective date as the date of initial application. Therefore, a company electing this option will not restate comparative period financial information, will not make the new required lease disclosures in comparative periods beginning before the effective date and will recognize its cumulative effect transition adjustment as of the effective date. Under the practical expedient mentioned above, it is expected that time charter revenue and service revenue will be presented under a single lease component presentation. The Company will elect this expedient upon adoption. The Company intends to adopt ASU 2016-02 on January 1, 2019 using the modified retrospective method, whereby a cumulative effect adjustment will be made as of that day with no retrospective effect. The Company also intends to elect to apply the package of practical expedients such that for any expired or existing leases it will not reassess lease classification, initial direct costs or whether any expired or existing contracts are or contain leases. The adoption of ASU 2016-02 will result in a change in the accounting method for certain of the Company’s sale-leaseback transactions and office leases. Under ASU 2016-02, the Company will recognize a right-of-use asset and a lease liability on the balance sheet for these sale-leaseback transactions and office leases of approximately $1.1 billion based on the present value of the future minimum lease payments, whereas currently no right-of-use asset or lease liability is recognized. The existing deferred gain related to the sale-leaseback transactions of $0.2 billion will be eliminated through a credit directly to retained earnings. The impact on the Company’s consolidated balance sheet will be an increase to its assets and liabilities. Operating lease expense related to these sale-leaseback transactions and office leases will be recognized on a straight-line basis over the term of the lease, adjusted for changes in interest rate-based variable lease payments in the period of change. This will result in a timing difference in expense recognition on the consolidated statement of operations. The adoption of ASU 2016-02 will require the Company to complete its lease classification assessment at lease commencement rather than when a lease is entered into. Historically, for charters that were negotiated concurrently with the construction of the related vessels, the fair value of the constructed asset was presumed to be its newbuilding cost. If such charters were classified as direct financing leases at the time the lease was entered into, no gain or loss was recognized subsequently on commencement of the charter. On adoption of ASU 2016-02, the fair value of the vessel will be determined based on information available at the lease commencement date, rather than lease inception date, and any difference in the fair value of the vessel upon commencement of the charter and its carrying value will be recognized as a gain or loss upon commencement of the charter. Measurement of credit loss In June 2016, FASB issued ASU 2016-13, “Measurement of Credit Loss on financial Instruments”. ASU 2016-13 replaces the current incurred loss impairment methodology with the expected credit loss impairment model (“CECL”), which requires consideration of a broader range of reasonable and supportable information to estimate expected credit losses over the life of the instrument instead of only when losses are incurred. This standard applies to financial assets measured at amortized cost basis and investments in leases recognized by the lessor. The revised guidance is effective for fiscal years, and interim periods within those years, beginning after December 15, 2019. Early adoption is permitted for fiscal years, and interim period within those years, beginning after December 15, 2018. The Company is evaluating the revised guidance to determine the impact it will have on its consolidated financial statements. Fair value measurement In August 2015, FASB issued ASU 2018-13, “Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement”. ASU 2018-13 revises fair value disclosures, including requiring additional information on changes in unrealized gains and losses and significant unobservable inputs as it relates to Level 3 fair value measurements. The revised guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. Early adoption is permitted upon issuance of this update. The Company is evaluating the revised guidance to determine the impact it will have on its consolidated financial statements.

Acquisition of GCI

Acquisition of GCI	12 Months Ended
	Dec. 31, 2018
Business Combinations [Abstract]
Acquisition of GCI	3. Acquisition of GCI: On March 13, 2018, the Company acquired the remaining 89.2% of equity interest in GCI from affiliates of The Carlyle Group and the minority owners of GCI. GCI’s fleet of 18 containerships, including two newbuilds, was comprised of 10000 TEU and 14000 TEU eco-class vessels. The aggregate purchase price was $498,050,000, comprised of: Cash $ 331,904 1,986,449 of the Company's Series D preferred shares 47,158 2,514,996 of the Company's Class A common shares 13,908 Settlement of intercompany balances 41,279 Carrying value of previously held equity interest 61,891 Transaction fees 1,910 Aggregate purchase price $ 498,050 Under the Agreement and Plan of Merger (the “Merger Agreement”), $10,000,000 was deposited in escrow for settlement of potential indemnifiable damages. If there are no claims for indemnification, the escrowed amount will be released within two business days after March 13, 2019. The value of the Company’s Series D preferred shares and Class A common shares was determined based on the closing market price of those shares on March 13, 2018, the date the acquisition closed. The initial holders of the 1,986,449 Series D preferred shares have a right commencing on September 13, 2019 and ending on October 13, 2019 to cause the Company to repurchase any of these shares they hold at that time for a price of $24.84 per share. Therefore, these Series D preferred shares are recorded as temporary equity. The Company incurred $1,910,000 of acquisition-related costs that have been capitalized as a cost of the net assets acquired. The Company accounted for the transaction as an asset acquisition as substantially all of the fair value of the gross assets acquired is concentrated in a single identifiable group of similar identifiable assets. Accordingly, the consideration has been allocated on a relative fair value basis to the assets acquired and liabilities assumed. The following table summarizes the value attributed to the identifiable assets acquired and liabilities assumed; Cash and cash equivalents $ 70,121 Current assets 5,316 Vessels 1,369,628 Vessels under construction 28,924 Other assets 107,407 Total assets acquired 1,581,396 Debt assumed 1,038,081 Current liabilities 31,115 Other long-term liabilities 14,150 Net assets acquired $ 498,050 As part of the acquisition, the Company purchased certain identifiable contracts (time charters) which had an estimated useful life of 5.3 years and is recorded in Other Assets and Other Long-Term Liabilities.

Related party transactions

Related party transactions	12 Months Ended
	Dec. 31, 2018
Related Party Transactions [Abstract]
Related party transactions	4. Related party transactions: (a) Prior to March 13, 2018, the Company had a 10.8% equity interest in GCI. The Company purchased the remaining 89.2% interest in GCI on March 13, 2018 (see note 3) and consolidated GCI from the date of acquisition. At December 31, 2018, the Company had nil (2017 - $36,100,000) due from GCI recorded as loans to affiliate, relating to payments made in connection with vessels GCI acquired pursuant to a right of first refusal. The loans bore interest at rates from 5% to 6% per annum. At December 31, 2018, the Company had nil (2017 - $1,385,500) due to GCI included in accounts payable and accrued liabilities. At December 31, 2018, the Company had $255,000 (2017 - $318,500) due from other related parties included in accounts receivable. (b) The Company incurred the following income or expenses with related parties: 2018 2017 2016 Fees paid: Interest expense $ 19,380 $ — $ — Arrangement fees — 1,827 7,598 Transaction fees — 2,262 6,317 Income earned: Interest income 427 2,677 7,513 Management fees 914 4,447 4,266 Supervision fees — 1,300 7,800 The income or expenses with related parties relate to amounts paid to or received from individuals or entities that are associated with the Company or with the Company’s directors or officers and these transactions are governed by pre-arranged contracts. In February 2018, the Company issued to Fairfax Financial Holdings Ltd. and its affiliates (“Fairfax”), in a private placement, $250,000,000 aggregate principal of 5.50% senior notes due in 2025 (“2025 Notes”) and warrants to purchase 38,461,539 of the Company’s Class A common shares for an aggregate purchase price of $250,000,000 (“2018 Warrants”) (note 9). The 2025 Notes are secured by ownership interest in Greater China Intermodal Investments LLC. The proceeds of the 2025 Notes and the 2018 Warrants were allocated to each security on a relative fair value basis. The indenture relating to the 2025 Notes provides that, subject to certain limitations, the Fairfax investors will have the right to designate a maximum of two members to the Company’s Board of Directors. On March 13, 2018, the Company and Fairfax entered into a subscription agreement pursuant to which the Company agreed to sell, and Fairfax agreed to purchase, $250,000,000 in aggregate principal amount of 5.50% senior notes due in 2026 (“2026 Notes”) and warrants to purchase 38,461,539 Class A common shares at an exercise price of $6.50 per share in January 2019 (“2019 Warrants”). On May 31, 2018, the Company entered into an agreement with Fairfax to receive a $500,000,000 equity investment through the early exercise of the 2018 Warrants on July 16, 2018 and 2019 Warrants on January 15, 2019. In consideration for the early exercise of the 2018 and 2019 Warrants, on July 16, 2018, Fairfax was issued additional seven-year warrants to purchase 25,000,000 Class A common shares at an exercise price of $8.05 per share (“New Warrants”). As a result of these transactions, Fairfax became a related party. Interest expense relates to interest expense on the 2025 Notes. Arrangement fees were paid to a company controlled by a former director in connection with services associated with debt and lease financings. The former director resigned from the Board of Directors in April 2017 and the agreement governing the arrangement fees was terminated. In addition, the Company paid a termination fee of $6,250,000 with 945,537 of its common shares which is included in Other Expenses in 2017. During the year ended December 31, 2017, transaction fees were paid to the Company’s former CEO in connection with services he provided relating to new build, purchase or sale contracts. These fees were capitalized to vessels. The obligation was contractually entered into during the former CEO’s employment and was paid in the Company’s common shares during the year ended December 31, 2018. The former CEO’s employment ended on December 31, 2017, at which time he was no longer considered a related party. Prior to March 13, 2018, interest income earned on the balance due from GCI was included in loans to affiliate. Prior to March 13, 2018, management and supervision fees earned from GCI for the management of GCI’s existing and newbuild vessels, respectively, were included in revenue.

Gross investment in lease

Gross investment in lease	12 Months Ended
	Dec. 31, 2018
Leases [Abstract]
Gross investment in lease	5. Gross investment in lease: 2018 2017 Gross investment in lease $ 861,979 $ 723,374 Current portion (44,348 ) (35,478 ) $ 817,631 $ 687,896 In April 2015, the Company entered into an agreement with MSC to bareboat charter five 11000 TEU vessels for a 17-year term, beginning from the vessel delivery dates. Pursuant to the Company’s right of first refusal agreement with GCI, the Company retained three of the vessels and GCI acquired the remaining two vessels. In June 2016, two of the five 11000 TEU vessels and associated bareboat charter contracts were acquired by the Company from GCI. At the end of each 17-year bareboat charter term, MSC has agreed to purchase each vessel for $32,000,000. Each transaction is considered a direct financing lease and accounted for as a disposition of vessels upon delivery of each vessel. In 2017, four of the five 11000 TEU vessels delivered and commenced their 17-year bareboat charters. In January 2018, the fifth 11000 TEU vessel was delivered and commenced its 17-year bareboat charter.

Vessels

Vessels	12 Months Ended
	Dec. 31, 2018
Property Plant And Equipment [Abstract]
Vessels	6. Vessels: December 31, 2018 Cost Accumulated depreciation Net book value Vessels $ 8,004,011 $ 2,077,737 $ 5,926,274 December 31, 2017 Cost Accumulated depreciation Net book value Vessels $ 6,116,091 $ 1,725,237 $ 4,390,854 Vessels under construction 146,362 — 146,362 Vessels $ 6,262,453 $ 1,725,237 $ 4,537,216 During the year ended December 31, 2018, the Company capitalized interest costs of $769,000 (2017 – $9,757,000) to vessels under construction. In 2017, the Company sold four 4250 TEU vessels; the Seaspan Alps, Seaspan Kenya, Seaspan Mourne and Seaspan Grouse for net sale proceeds of $37,100,000, resulting in a gain on disposition of $13,604,000. In 2016, the Company sold two 4600 TEU vessels; the Seaspan Excellence and Seaspan Efficiency for net sale proceeds of $12,078,000, resulting in a loss on disposition of $31,876,000. At December 31, 2018, the Company did not identify any events or changes in circumstances indicating that the carrying amount of the assets may not be recoverable and accordingly, no impairment was recorded at December 31, 2018. The Company performed an impairment test of its vessels as of December 31, 2017. As of December 31, 2017, the Company concluded that there were circumstances which could be considered indicators that the carrying amount of its vessels may not be recoverable. Although short-term charter rates and vessel market value for smaller vessels, which are at the highest risk of impairment, had generally shown improvement during 2017, time charter rates and vessel market values had remained volatile during 2017 and did not show indication of being stabilized in any meaningful manner. The Company believed the continued instability in the market during 2017 to be an indicator of possible impairment. As a result, the Company performed an impairment test of its vessels at December 31, 2017 and determined that the undiscounted future cash flows each particular vessel was expected to generate over its remaining useful life was greater than its carrying value, and concluded no impairment charge was required. As of December 31, 2016, the Company recorded non-cash vessel impairments of $285,195,000 on 16 vessels held for use, which included four 4250 TEU, two 3500 TEU and ten 2500 TEU vessels.

Other assets

Other assets	12 Months Ended
	Dec. 31, 2018
Other Assets [Abstract]
Other assets	7. Other assets: 2018 2017 Equity investment in affiliate (a) $ — $ 60,683 Intangible assets (b) 111,968 27,486 Deferred dry-dock (c) 36,660 42,536 Deferred financing fees (c) 17,286 19,484 Restricted cash (d) 14,069 14,060 Capital assets 600 3,268 Other 24,348 28,787 Other assets $ 204,931 $ 196,304 (a) Equity investment in affiliate In March 2011, the Company entered into an agreement to participate in GCI, an investment vehicle established by an affiliate of The Carlyle Group. The Company accounted for its 10.8% investment in GCI using the equity method. As at December 31, 2017, the equity investment of $60,683,000 was comprised of the Company’s capital contribution of $51,406,000 and its cumulative equity income on investment of $9,277,000. On March 13, 2018, the Company acquired the remaining 89.2% (note 3). (b) Intangible assets Intangible assets primarily comprises of the fair value of time charter contracts acquired. In connection with the acquisition of GCI on March 13, 2018 (note 3), the Company recognized $100,750,000 for the fair value of time charter contracts. During the year ended December 31, 2018, the Company recorded $16,269,000 of amortization expense related to all acquired contracts. The future amortization expense related to the fair value of all time charter contracts acquired is approximated as follows: 2019 $ 19,739 2020 19,223 2021 17,658 2022 16,090 2023 12,390 Thereafter 25,199 $ 110,299 (c) Deferred charges During the years ended December 31, 2018 and 2017, changes in deferred charges were as follows: Dry-docking Financing fees December 31, 2016 $ 49,037 $ 19,062 Costs incurred 8,708 2,554 Amortization expensed (1) (15,209 ) (2,132 ) December 31, 2017 $ 42,536 $ 19,484 Costs incurred 10,756 27 Amortization expensed (1) (16,632 ) (2,225 ) December 31, 2018 $ 36,660 $ 17,286 _____________ (1) (d) Restricted cash Restricted cash represents amounts required to be set aside by contractual agreement for two of the Company’s capital leases. The restriction will be removed upon termination of the charter agreements.

Deferred revenue

Deferred revenue	12 Months Ended
	Dec. 31, 2018
Deferred Revenue Disclosure [Abstract]
Deferred revenue	8. Deferred revenue: 2018 2017 Deferred revenue on time charters $ 22,318 $ 26,907 Deferred interest on lease receivable 410,481 355,451 Other deferred revenue — 1,690 Deferred revenue 432,799 384,048 Current portion of deferred revenue (55,915 ) (55,367 ) Deferred revenue $ 376,884 $ 328,681

Long-term debt

Long-term debt	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Long-term debt	9. Long-term debt: 2018 2017 Long-term debt: Revolving credit facilities (a) (c) $ 788,198 $ 854,121 Term loan credit facilities (b) (c) 2,158,743 1,196,016 Senior unsecured notes (d) 400,396 417,925 2025 Notes (e) 250,000 — 3,597,337 2,468,062 Fair value adjustment on term loan credit facilities (b) (2,339 ) — Debt discount on 2025 Notes (e) (83,392 ) — Deferred financing fees (24,065 ) (17,429 ) Long-term debt 3,487,541 2,450,633 Current portion of long-term debt (722,641 ) (257,800 ) Long-term debt $ 2,764,900 $ 2,192,833 (a) Revolving facilities As of December 31, 2018, the Company had four revolving credit facilities (“Revolvers”) available and a line of credit which provided for aggregate borrowings of up to $938,209,000 (2017 – $974,132,000), of which $150,011,000 (2017 - $120,000,000) was undrawn. One of the term loan facilities (“Term Loans”) has a revolving loan component and this component has been included in the Revolvers. In February 2018, the Company cancelled its $120,000,000 364-day, unsecured revolving loan facility, which had not been drawn. In August 2018, the Company entered into a two-year revolving credit facility to draw up to $150,000,000 for use in general corporate purposes. The facility bears interest at LIBOR plus margin. Under certain events, including receipt of proceeds from various other financings, the Company’s cash balance being outside of a certain range or change of control, prepayments may be required on portions of the outstanding balance. The Company has pledged ownership interest in Greater China Intermodal Investments LLC as collateral for this revolving facility and for the 2025 Notes. As of December 31, 2018, no amounts have been drawn under the revolving facility. The revolvers mature between August 2019 and December 2023. The following is a schedule of future minimum repayments of revolving credit facilities as of December 31, 2018: 2019 $ 197,320 2020 53,281 2021 56,416 2022 422,941 2023 58,240 $ 788,198 Interest is calculated as one month LIBOR plus a margin per annum. At December 31, 2018, the one month average LIBOR was 2.4% (2017 – 1.5%) and the margins ranged between 0.5% and 1.4% (2017 – 0.5% and 1.4%) for revolving credit facilities. The weighted average rate of interest, including the margin, for the Company’s revolving credit facilities was 3.0% at December 31, 2018 (2017 – 2.2%). Interest payments are made monthly. The Company is subject to commitment fees ranging between 0.2% and 0.5% (2017 – 0.2% and 0.4%) calculated on the undrawn amounts under the various facilities. For secured facilities, revolver loan payments are made in semi-annual payments commencing six or thirty-six months after delivery of the associated newbuilding containership for the secured facilities. One revolving facility, with a principal outstanding of $58,240,000, is due in full at maturity on December 31, 2023. (b) Term Loans As of December 31, 2018, the Company had $2,158,743,000 (2017 - $1,301,616,000) of Term Loans available, of which nil (2017 - $105,600,000) was undrawn. One of the Term Loans has a revolving loan component which has been included in the Revolvers. In March 2018, the Company entered into a secured Term Loan for $100,000,000 which bears interest at LIBOR plus a margin. The facility is secured by 11 vessels currently owned by the Company which were previously unencumbered. As part of the acquisition of GCI on March 13, 2018, the Company assumed long-term debt which was recorded at its fair value of $1,038,081,000 (note 3). The assumed long-term debt consists primarily of 12 Term Loans to finance 16 operating vessels. The Term Loans bear interest at LIBOR plus a margin. In April 2018, the Company entered into a secured Term Loan for up to $120,000,000 to finance two 10000 TEU vessels that were delivered in May 2018. The loan bears interest at LIBOR plus a margin. In August 2018, the Company made a repayment of $29,200,000 for the remaining principal balance of one of its secured Term Loans. As of December 31, 2018, as a result of the repayment on the secured Term Loan, four vessels were unencumbered. The Company also made a prepayment of $29,000,000 for the remaining balance of another unsecured Term Loan. In September 2018, the Company made a repayment of $100,900,000 on the principal balance of one of its secured Term Loans. As of December 31, 2018, as a result of the repayment on the secured Term Loan, two of the four vessels under security were unencumbered. In November 2018, the Company made a repayment of $36,484,000 for the remaining principal balance of another secured Term Loan. As of December 31, 2018, as a result of the repayment on the secured Term Loan, six vessels were in the process of becoming unencumbered (note 20). Term Loans mature between September 2020 and January 2030. The following is a schedule of future minimum repayments of Term Loans as of December 31, 2018: 2019 $ 207,194 2020 265,270 2021 412,091 2022 277,719 2023 517,640 Thereafter 478,829 $ 2,158,743 Certain Term Loans, with a total principal outstanding of $2,093,228,000, have interest calculated as one month, three month or six month LIBOR plus a margin per annum, dependent on the interest period selected by the Company. At December 31, 2018, the one month, three month and six month average LIBOR was 2.4%, 2.6% and 2.5%, respectively (2017 – 1.6%, 1.5% and 1.5%, respectively) and the margins ranged between 0.4% and 4.8% (2017 – 0.4% and 4.8%) for Term Loans. One Term Loan, with a total principal outstanding of $65,515,000 (2017 – $78,288,000), has interest calculated based on the Export-Import Bank of Korea (KEXIM) rate plus 0.7% (2017 – 0.7%) per annum. The weighted average rate of interest, including the margin, was 4.8% at December 31, 2018 (2017 – 3.6%) for Term Loans. Interest payments are made in monthly, quarterly or semi-annual payments. Term Loan payments are made in quarterly or semi-annual payments commencing three, six or thirty-six months after delivery of the associated newbuilding containership or utilization date. Waivers For one of the Company’s Term Loans, the Company initially obtained a waiver from the lender extending the period for securing acceptable replacement charters for two of the vessels to the fourth quarter of 2017. In September 2017, the Company received another waiver from the lender which extends the period for securing replacement charters to October 2020. If either of the vessels remains unemployed for a consecutive period of more than 90 days, then the waiver will be terminated. For four GCI vessels financed by the same lender, a similar waiver was received by GCI, also extending the period for securing replacement charters to October 2020. Two of these vessels have since been released from security as the vessel loans have been fully repaid. For another Term Loan, the Company entered into a supplement to the loan agreement, in which the lender extended the period for securing an acceptable replacement charter for one vessel to the fourth quarter of 2018. In March 2018, the Company entered into another supplement to the loan agreement with the lender to remove the requirement to secure an acceptable replacement charter by the fourth quarter of 2018. In connection with this supplement to the loan agreement the Company prepaid $10,000,000 of the loan balance in March 2018. The final maturity of this facility is December 2022. (c) Credit facilities – other terms As of December 31, 2018, the Company’s credit facilities, including those of GCI, are secured by first-priority mortgages granted on 70 vessels, of which six are in the process of being released from security. The security for each of the Company’s current secured credit facilities includes: • A first priority mortgage on the collateral vessels funded by the related credit facility; • An assignment of the Company’s time charters and earnings related to the related collateral vessels; • An assignment of the insurance on each of the vessels that are subject to a related mortgage; • An assignment of the Company’s related shipbuilding contracts and the corresponding refund guarantees; • A pledge over shares of various subsidiaries; and • A pledge over the related retention accounts. The Company may prepay certain amounts outstanding without penalty, other than breakage costs in certain circumstances. Under each of the credit facilities, a prepayment may be required as a result of certain events, including the sale or loss of a vessel, a termination or expiration of a charter (and the inability to enter into a charter suitable to lenders within a period of time), termination of a shipbuilding contract or a change of control. The amount that must be prepaid may be calculated based on the loan to market value ratio or some other ratio that takes into account the market value of the relevant vessels. In these circumstances, valuations of the Company’s vessels are conducted on a “without charter” basis as required under the relevant credit facility agreement. Each credit facility, other than the credit facilities of GCI’s subsidiaries, contains financial covenants requiring the Company to maintain minimum liquidity, tangible net worth, interest coverage ratios, interest and principal coverage ratios, and debt to assets ratios, as defined. The facilities within GCI are held within special purpose entities, all of which are wholly-owned subsidiaries of GCI. Each facility is guaranteed by GCI and as the guarantor, GCI must meet certain consolidated financial covenants under these Term Loans including maintaining certain minimum tangle net worth, cash requirements and debt to asset ratios. Some of the facilities also have an interest and principal coverage ratio requirement for the subsidiary borrower. The Company is in compliance with these covenants at December 31, 2018. (d) Senior unsecured notes During 2014, the Company issued, in a public offering, 13,800,000 senior unsecured notes due 2019 at a price of $25.00 per note for gross proceeds of $345,000,000. The 2019 Notes will mature on April 30, 2019 and bear interest at a rate of 6.375% per annum payable quarterly. In 2018, the Company repurchased $17,529,000 of senior unsecured notes. On October 10, 2017, the Company issued, in a public offering, 3,200,000 senior unsecured notes due 2027 at a price of $25.00 per note for gross proceeds of $80,000,000. The 2027 Notes will mature on October 30, 2027 and bear interest at a rate of 7.125% per annum, payable quarterly. (e) 2025 Notes In February 2018, the Company issued to Fairfax the 2025 Notes bearing interest at 5.5% for an aggregate principal of $250,000,000 and the 2018 Warrants (notes 4 and 12(c)) to purchase 38,461,539 of the Company’s Class A common shares for an aggregate purchase price of $250,000,000 In March 2018, the Company and Fairfax entered into a subscription agreement pursuant to which the Company agreed to sell and Fairfax agreed to purchase, the 2026 Notes bearing interest at 5.5% for an aggregate principal of $250,000,000 and the 2019 Warrants to purchase 38,461,539 Class A common shares of the Company at $6.50 per share, for an aggregate purchase price of $250,000,000 in January 2019. This transaction closed on January 15, 2019. The ownership interest in Greater China Intermodal Investments LLC has been pledged as collateral for the Fairfax Notes and for one revolving facility. In July 2018, the 2025 Notes and 2026 Notes were amended to allow Fairfax to call for early redemption of some or all of the 2025 Notes and 2026 Notes on each respective anniversary date of issuance (the “Annual Put Right”) by providing written notice between 150 days and 120 days prior to each applicable anniversary date. On September 26, 2018, Fairfax waived its right to call for early redemption of the 2025 Notes on the February 2019 anniversary date. On February 20, 2019, Fairfax waived its right to call for early redemption of the 2025 Notes on the February 2020 anniversary date (note 20).

Long-term obligations under cap

Long-term obligations under capital lease	12 Months Ended
	Dec. 31, 2018
Capital Lease Obligations [Abstract]
Long-term obligations under capital lease	10. Long-term obligations under capital lease: 2018 2017 Long-term obligations under capital lease $ 647,664 $ 648,840 Deferred financing fees (7,908 ) (9,912 ) Long-term obligations under capital lease 639,756 638,928 Current portion of long-term obligations under capital lease (48,384 ) (43,912 ) Long-term obligations under capital lease $ 591,372 $ 595,016 The Company, through certain of its wholly-owned subsidiaries, has entered into non-recourse or limited recourse sale-leaseback arrangements with financial institutions to fund the construction of certain vessels under existing shipbuilding contracts. Under these arrangements, the Company has agreed to transfer the vessels to the lessors and, commencing on the delivery date of the vessels by the shipyard, lease the vessels back from the lessor over the applicable lease term as a capital lease. In the arrangements where the shipbuilding contracts are novated to the lessors, the lessors assume responsibility for the remaining payments under the shipbuilding contracts. In certain of the arrangements, the lessors are companies whose only assets and operations are to hold the Company’s leases and vessels. The Company operates the vessels during the lease term, supervises the vessels’ construction before the lease term begins or is required to purchase the vessels from the lessor at the end of the lease term. As a result, the Company is considered to be the primary beneficiary of the lessors and consolidates the lessors for financial reporting purposes. The vessels are recorded as an asset and the obligations under these arrangements are recorded as a liability. The terms of the leases are as follows: ( i ) Under this arrangement, the lessor has provided financing of $144,185,000. The 12-year lease term began in June 2011, which was the vessel’s delivery date. Lease payments include an interest component based on three month LIBOR plus a 2.6% margin. At the end of the lease, the outstanding balance of up to $48,000,000 will be due and title of the vessel will transfer to the Company. As at December 31, 2018, the carrying value of the vessel under this facility was $136,311,000. ( ii ) Under this arrangement, the lessor has provided financing of $109,000,000. The 12-year lease term began in March 2012, which was the vessel’s delivery date. Lease payments include an interest component based on three month LIBOR plus a 3.0% margin. At the end of the lease, the Company will have the option to purchase the vessel from the lessor for $1. As at December 31, 2018, the carrying value of the vessel under this facility was $139,407,000. The weighted average rate of interest, including the margin, was 5.64% at December 31, 2018 (2017 – 4.8%). (iii) Leases for three 4500 TEU vessels: Under these arrangements, the lessor provided refinancing of $150,000,000. The five year lease terms began in March 2015. At delivery, the Company sold and leased the vessels back over the terms of the sale-leaseback transactions. At the end of the lease terms, the Company is obligated to purchase the vessels at a pre-determined purchase price. As at December 31, 2018, the carrying value of the vessels under these facilities was $215,080,000. As of December 31, 2018, the carrying value of the five vessels funded under these facilities was $490,798,000 (2017 – for five vessels and one vessel under construction $602,695,000). (iv) Leases for five 11000 TEU vessels: Under these arrangements, the lessor provided financing of $420,750,000. The 17-year lease terms began between August 2017 and January 2018, which were the vessels’ delivery dates. Lease payments include interest components based on three month LIBOR plus a 3.3% margin. At delivery, the Company sold and leased the vessels back over the term of the sale-leaseback transactions. At the end of the lease terms, the Company is obligated to purchase the vessels at a pre-determined purchase price. The Company is subject to 0.8% commitment fees calculated on the undrawn amounts. Upon delivery, these vessels commenced 17-year bareboat charters with MSC. Based on amounts funded, payments due to the lessors for all ten vessels would be as follows: 2019 $ 59,086 2020 150,401 2021 46,352 2022 46,808 2023 88,552 Thereafter 281,370 672,569 Less amounts representing interest (24,905 ) 647,664

Other long-term liabilities

Other long-term liabilities	12 Months Ended
	Dec. 31, 2018
Other Liabilities Disclosure [Abstract]
Other long-term liabilities	11. Other long-term liabilities: 2018 2017 Deferred gain on sale-leasebacks (a) $ 181,053 $ 203,737 Other 31,347 19,284 Other long-term liabilities 212,400 223,021 Current portion of other long-term liabilities (32,243 ) (23,635 ) Other long-term liabilities $ 180,157 $ 199,386 (a) During the year ended December 31, 2018, the Company did not enter into any sale-leaseback transactions. In May 2017, the Company entered into a sale-leaseback transaction with Asian special purpose companies, or SPCs, for one 14000 TEU vessel, the YM Wind, for gross proceeds of $144,000,000. Under the transaction, the Company sold the vessel to the SPCs and leased the vessel back from the SPCs over a term of 12 years, with an option to purchase the vessel at the 9.5 year anniversary for a pre-determined fair value purchase price. The sale of this vessel resulted in a deferred gain totaling approximately $31,611,000 which is being recorded as a reduction of the related operating lease expense over the 12 year lease term.

Puttable Preferred Shares and S

Puttable Preferred Shares and Share Capital	12 Months Ended
	Dec. 31, 2018
Equity [Abstract]
Puttable Preferred Shares and Share Capital	12. Puttable preferred shares and share capital: (a) Common shares: At the April 2018 annual general meeting, the Company amended the number of authorized Class A common shares from 200,000,000 to 400,000,000. In addition to Class A common shares, the Company has 25,000,000 Class B common shares and 100 Class C common shares authorized. As at December 31, 2018, there are no Class B or Class C common shares outstanding (2017 – nil and nil). The Company has a dividend reinvestment program (“DRIP”) that allows interested shareholders to reinvest all or a portion of cash dividends received in the Company’s common shares. If new common shares are issued by the Company, the reinvestment price is equal to the average price of the Company’s common shares for the five days immediately prior to the reinvestment, less a discount. The discount rate is set by the Board of Directors and is currently 3%. If common shares are purchased in the open market, the reinvestment price is equal to the average price per share paid. In March 2017, the Company entered into an equity distribution agreement with sales agents under which the Company may, from time to time, issue Class A common shares in one or more at-the-market (“ATM”) offerings up to an aggregate of $75,000,000 in gross sales proceeds. In 2017, the Company issued 11,800,000 Class A common shares under the ATM offerings for gross proceeds of $74,953,000. The ATM offering completed the authorized issuances under the equity distribution agreement. In November 2017, the Company entered into a second equity distribution agreement under which the Company may, from time to time, issue Class A common shares in ATM offerings for up to an aggregate of $100,000,000. In 2017 the Company issued 6,750,000 Class A common shares under the ATM offerings for gross proceeds of $40,395,000. During the year ended December 31, 2018, the Company did not issue any common shares under an ATM offering. In March 2018, the Company issued 2,514,996 Class A common shares for $13,908,000 as part of the consideration paid for the acquisition of GCI (note 3). (b) Preferred shares: At December 31, 2018, the Company had the following preferred shares outstanding: Liquidation preference Shares Dividend rate Redemption by Company December December Series Authorized Issued per annum permitted on or after 2018 2017 A 315,000 — ― ― $ ― $ ― B 260,000 — ― ― ― ― C 40,000,000 — ― ― ― ― D 20,000,000 7,017,313 (2) 7.95 % January 30, 2018 (2) 175,433 (1) 125,772 E 15,000,000 5,415,937 8.25 % February 13, 2019 (2) 135,398 135,398 F 20,000,000 ― (3) ― ― ― (3) 140,000 G 15,000,000 7,800,800 8.20 % June 16, 2021 (2) 195,020 195,020 H 15,000,000 9,025,105 7.875 % August 11, 2021 (2) 225,628 225,628 I 6,000,000 6,000,000 8.00 % October 30, 2023 (2) 150,000 ― R 1,000,000 ― ― ― ― ― __________ (1) Includes 1,986,449 puttable preferred shares, with aggregate liquidation preference of $49,661,000. (2) Redeemable by the Company, in whole or in part, at a redemption price equal to its liquidation preference of $25.00 per share plus unpaid dividends. The preferred shares are not convertible into common shares and are not redeemable by the holder. (3) In July 2018, the Company redeemed all Series F preferred shares for $140,000,000 plus accrued dividends of $3,430,000. In September 2018, the Company issued an aggregate of 6,000,000 Series I preferred share for gross proceeds of $150,000,000. Dividends are cumulative at a fixed rate of 8.00% until, but excluding October 30, 2023. From and including October 30, 2023, dividends are based on three-month LIBOR plus a margin of 5.008%. Preferred share repurchase plans In June 2017, the Company entered into a preferred share repurchase plan for up to $10,000,000 of its Series D, E, G and H preferred shares, which expired in December 2017. The Company did not make any repurchases under the plan during the years ended December 31, 2017 and 2018. At-the-market offering of preferred shares In November 2016, the Company entered into an equity distribution agreement with a sales agent under which the Company may, from time to time, issue Series D, Series E, Series G and Series H preferred shares in one or more ATM offerings up to an aggregate of $150,000,000 in gross sales proceeds. During the year ended December 31, 2017, the Company issued an aggregate of 121,077 of its Series D, E, G, and H preferred shares in a follow-on public offering for gross proceeds of $2,957,000. During the year ended December 31, 2018, the Company did not issue any preferred shares under an ATM offering. The preferred shares are subject to certain financial covenants and the Company is in compliance with these covenants at December 31, 2018. Puttable preferred shares The Company issued 1,986,449 Series D preferred shares as consideration for the acquisition of GCI on March 13, 2018, which are redeemable at the option of the holder for a period, beginning 18 months and ending 19 months after issuance. Upon issuance, these preferred shares were recorded outside of permanent equity at a fair value of $23.74 per share, accreted up to the holder’s redemption value of $24.84 per share until the earliest redemption date. As at December 31, 2018, the accreted value of the puttable Series D preferred shares was $48,139,000 (2017 – nil). (c) Warrants: The 2018 Warrants entitle the holder to purchase one share of the Company’s Class A common shares at an exercise price of $6.50 per share, subject to customary anti-dilution adjustments. Each warrant is exercisable within seven years. The holder may pay the aggregate exercise price in cash, by redemption of a fixed amount of 2025 Notes or by any combination of the foregoing. The Company can elect to require early exercise of the 2018 Warrants, at any time after February 14, 2022, if the volume weighted average price of the Company’s Class A common shares, averaged over a 20-day period, equals or exceeds twice the exercise price of the 2018 Warrants at that time. On July 16, 2018, the Company closed an agreement such that Fairfax agreed to exercise the 2018 Warrants immediately to purchase 38,461,539 Class A common shares and to exercise the 2019 Warrants upon issuance in January 2019, both in cash. In consideration for Fairfax early exercising the 2018 Warrants and the 2019 Warrants, the Company issued New Warrants to purchase 25,000,000 Class A common shares at an exercise price of $8.05 per share, subject to customary anti-dilution adjustments. Each warrant is exercisable within seven years. The holder may pay the aggregate exercise price by cash, by cashless exercise or by any combination of the foregoing. The Company can elect to require early exercise of the New Warrants, at any time after July 16, 2022, if the volume weighted average price of the Company’s Class A common shares, averaged over a 20-day period, equals or exceeds twice the exercise price of the New Warrants three days prior to the exercise notice. If the 2019 Warrants were not exercised in January 2019, 12,500,000 of the New Warrants or the Class A common shares, if exercised, would be cancelled. The 2019 Warrants were issued on January 15, 2019 and immediately exercised for cash.

Earnings per share

Earnings per share	12 Months Ended
	Dec. 31, 2018
Earnings Per Share [Abstract]
Earnings per share	13. Earnings per share: Earnings Shares Per For the year ended December 31, 2018 (numerator) (denominator) amount Net earnings $ 278,798 Less preferred share dividends: Series D (14,610 ) Series E (11,170 ) Series F (8,289 ) Series G (15,992 ) Series H (17,768 ) Series I (3,400 ) Basic EPS: Earnings attributable to common shareholders $ 207,569 154,848,000 $ 1.34 Effect of dilutive securities: Share-based compensation — 91,000 2018 Warrants and New Warrants — 3,129,000 Diluted EPS (1) Earnings attributable to common shareholders (1) $ 207,569 158,068,000 $ 1.31 Earnings Shares Per For the year ended December 31, 2017 (numerator) (denominator) amount Net earnings $ 175,237 Less preferred share dividends: Series D (9,925 ) Series E (11,100 ) Series F (9,730 ) Series G (15,990 ) Series H (17,731 ) Basic EPS: Earnings attributable to common shareholders $ 110,761 117,524,000 $ 0.94 Effect of dilutive securities: Share-based compensation — 81,400 Diluted EPS (1) Earnings attributable to common shareholders (1) $ 110,761 117,605,400 $ 0.94 Earnings Shares Per For the year ended December 31, 2016 (numerator) (denominator) amount Net loss $ (139,039 ) Less preferred share dividends: Series C (14,420 ) Series D (9,900 ) Series E (11,077 ) Series F (6,055 ) Series G (7,404 ) Series H (6,841 ) Basic EPS: Loss attributable to common shareholders $ (194,736 ) 102,869,000 $ (1.89 ) Effect of dilutive securities: Share-based compensation — — Diluted EPS (1) Earnings attributable to common shareholders (1) $ (194,736 ) 102,869,000 $ (1.89 ) __________________ (1) The unexercised share-based compensation awards and convertible Series F preferred shares are not included in the computation of diluted EPS when their effects are anti-dilutive.

Share-based compensation

Share-based compensation	12 Months Ended
	Dec. 31, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Share-based compensation	14. Share-based compensation: In December 2005, the Company’s Board of Directors adopted the Seaspan Corporation Stock Incentive Plan (the “Plan”), under which officers, employees and directors may be granted options, restricted shares, phantom shares, and other stock-based awards as may be determined by the Company’s Board of Directors. In December 2015, the Plan, which is administered by the Company’s Board of Directors, was amended to increase the total shares of common stock reserved for issuance under the Plan to 3,000,000. The Plan was also amended to an indefinite term from the date of its adoption. In December 2017, the Plan was further amended to increase the total shares of common stock reserved for issuance under the Plan to 5,000,000. At December 31, 2018, there are 2,187,420 (2017 – 2,952,896) remaining shares left for issuance under this Plan. A summary of the Company’s outstanding restricted shares, phantom share units, SARs and restricted stock units as of and for the years ended December 31, 2018, 2017 and 2016 are presented below: Restricted shares Phantom share units Stock appreciation rights Restricted stock units Stock options Number W.A. Number W.A. grant Number of W.A. grant Number W.A. grant Number W.A. grant of shares date FV of units date FV SARs date FV of units date FV of options date FV December 31, 2015 44,947 $ 18.39 $ 647,001 $ 14.73 $ 5,876,811 $ 2.30 $ 32,828 $ 21.03 $ — $ — Granted 56,861 15.48 60,000 18.84 — — 528,232 16.57 — — Vested (44,947 ) 18.39 — — — — (37,374 ) 18.56 — — Exchanged — — (70,000 ) 19.91 — — — — — — Expired — — — — (3,438,614 ) 2.26 — — — — Cancelled — — — — — — (299 ) 20.21 — — December 31, 2016 56,861 15.48 637,001 14.55 2,438,197 2.29 523,387 16.71 — — Granted 107,270 8.97 90,000 6.85 — — 88,293 5.93 — — Vested (56,861 ) 15.48 — — — — (537,216 ) 16.16 — — Expired — — — — (1,929,260 ) 2.00 — — — — Cancelled (12,737 ) 9.53 — — (22,963 ) 3.40 (3,280 ) 9.16 — — December 31, 2017 94,533 8.89 727,001 13.60 485,974 3.40 71,184 7.80 — — Granted 664,326 7.68 30,000 6.86 — — 109,248 9.73 500,000 7.20 Vested (119,509 ) 8.52 — — — — (83,220 ) 9.87 — — Exchanged — — (113,333 ) 18.80 — — — — — — Expired — — — — (485,974 ) 3.40 — — — — Cancelled (53,608 ) 7.10 (76,666 ) 7.90 — — (12,441 ) 7.28 — — December 31, 2018 585,742 $ 7.76 567,002 $ 12.97 — $ — 84,771 $ 8.33 500,000 $ 7.20 During the year ended December 31, 2018, the Company amortized $2,989,000 (2017 – $10,400,000; 2016 - $6,228,000) in share-based compensation expense related to the above share-based compensation awards. At December 31, 2018, there was $1,474,000 (2017 – $4,178,000) of total unamortized compensation costs relating to unvested share-based compensation awards, which are expected to be recognized over a weighted-average period of 24 months. In July 2017, 1,000,000 fully vested Class A common shares were granted to the Company’s chairman of the board (the “Chairman”). In addition, in August 2017, the Chairman purchased 1,000,000 Class A common shares for $6.00 per share. As a result of these transactions, the Company recognized $6,920,000 in share-based compensation expense for the year ended December 31, 2017. (a) Restricted shares and phantom share units: Class A common shares are issued on a one-for-one basis in exchange for the cancellation of vested restricted shares and phantom share units. The restricted shares generally vest over one year and the phantom share units generally vest over three years. During the year ended December 31, 2018, the fair value of restricted shares vested was $1,018,000 (2017 – $880,000). As vested outstanding phantom share units are only exchanged for common shares upon written notice from the holder, the phantom share units that are exchanged for common shares may include units that vested in prior periods. At December 31, 2018, 537,002 (2017 – 587,001) of the outstanding phantom share units were vested and available for exchange by the holder. In December 2018, 500,000 restricted shares, were granted to the CEO of the Company. These restricted shares vest over five years, up to a maximum amount each year. (b) Restricted stock units: Under the Company’s Cash and Share Bonus Plan, the Company grants restricted stock units to eligible participants. The restricted stock units generally vest over three years, in equal one-third amounts on each anniversary date of the date of the grant. The restricted stock units are valued at the market price of the underlying securities on the grant date and the compensation expense, based on the estimated number of awards expected to vest, is recognized over the three-year vesting period. Upon vesting of the restricted stock units, the participant will receive Class A common shares. This plan expired on June 30, 2018. During the year ended December 31, 2018, certain former directors and officers of the Company retired resulting in an aggregate of 12,441 restricted stock units, with a weighted average of $7.28 per unit, to be cancelled. In May 2016, 479,714 restricted stock units were granted to the Company’s former CEO. In December 2017, as part of the terminated employment agreement, the unvested portion of restricted stock units granted in May 2016 fully vested upon his departure. (c) Performance stock units: In May 2016, 786,147 performance stock units were granted to the Company’s former CEO. The weighted average grant date fair value was $10.23 per unit. Upon the former CEO’s retirement the Company agreed to issue him 200,000 Class A common shares in exchange for the cancellation of his outstanding performance stock units granted in May 2016. These shares were issued in January 2018. (d) Stock options: In January 2018, the Company granted the CEO stock options to acquire 500,000 Class A common shares at an exercise price of $7.20 per share. The stock options vest equally on each of the first five anniversaries of the CEO’s start date in January 2018 and expire on January 8, 2028. As at December 31, 2018, no stock options have been vested. (e) Other share-based awards: During 2018, the Company incurred $2,326,000 (2017 - $2,262,000; 2016 - $6,317,000) in transaction fees that were capitalized to vessels, all of which (2017 - $2,231,000; 2016 - $3,159,000) was paid in Class A common shares. During 2018, the Company incurred nil (2017 - $1,872,000; 2016 - $7,598,000) in arrangement fees that were primarily capitalized into deferred financing fees, of which nil (2017 - $1,872,000; 2016 - $3,799,000) were paid in Class A common shares. The agreement governing the arrangement fees was terminated in April 2017. Pursuant to the termination of the agreement, the Company paid arrangement fees for any financings in process as at April 10, 2017 and completed prior to December 31, 2017. The Company paid a termination fee of nil (2017 - $6,250,000; 2016 - nil) with nil (2017 - 945,537; 2016 - nil) of its common shares which is included in other expenses.

Other information

Other information	12 Months Ended
	Dec. 31, 2018
Additional Financial Information Disclosure [Abstract]
Other information	15. Other information: (a) Accounts payable and accrued liabilities: The principal components of accounts payable and accrued liabilities are: 2018 2017 Due to related parties (note 4) $ — $ 1,386 Accrued interest 20,276 14,614 Accounts payable and other accrued liabilities 49,935 47,220 $ 70,211 $ 63,220 (b) Supplemental cash flow information: 2018 2017 2016 Interest paid on debt $ 194,316 $ 111,180 $ 109,272 Interest received 3,737 6,829 8,041 Undrawn credit facility fee paid 619 2,444 2,856 Non-cash transactions: Dividend reinvestment 22,807 21,785 4,359 Arrangement and transaction fees settled in shares (note 14) 2,326 4,199 6,393 Acquisition of time charters through novation from GCI — — 16,200 Acquisition of GCI Subsidiaries through settlement of loans to affiliate — — 107,500 Capital contribution through settlement of loans to affiliate — 6,667 — Carrying value of previously held equity in GCI settled on acquisition (note 3) 61,891 — — Issuance of Class A common shares on acquisition (note 3) 13,908 — — Issuance of New Warrants (note 4) 67,523 — — Issuance of Series D preferred shares on acquisition (note 3) 47,158 — — Offset of swaption against swap liability termination — 10,852 — Recognition of fair value of bareboat charters — — 16,200 Repayment of debt from sale-leaseback transaction proceeds — 53,247 — Settlement of GCI transaction fees paid by the Company (note 3) 15,224 — — Settlement of loans to affiliate, accrued interest and other intercompany balances on acquisition (note 3) 38,849 — — The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the consolidated balance sheets that sum to the amounts shown in the consolidated statements of cash flows: 2018 2017 2016 Cash and cash equivalents $ 357,327 $ 253,176 $ 367,901 Restricted cash included in other assets (note 8) 14,067 14,060 14,059 Total cash, cash equivalents and restricted cash $ 371,394 $ 267,236 $ 381,960

Commitments and contingencies

Commitments and contingencies	12 Months Ended
	Dec. 31, 2018
Commitments And Contingencies Disclosure [Abstract]
Commitments and contingencies	16. Commitments and contingencies: (a) At December 31, 2018, the minimum future revenues to be received on committed time-charter party agreements and interest income from direct financing leases are as follows: 2019 $ 1,094,608 2020 977,926 2021 844,261 2022 688,537 2023 469,754 Thereafter 751,473 $ 4,826,559 The minimum future revenues are based on 100% utilization, relate to committed time-charter party agreements currently in effect and assume no renewals or extensions. (b) At December 31, 2018, based on the contractual delivery dates, the Company had nil commitments (2017 – $140,600,000) for installment payments for vessels under construction. (c) At December 31, 2018, the commitment under operating leases for vessels is $1,279,074,000 for the remainder of 2019 to 2029 and for office space is $8,401,000 for the remainder of 2019 to 2024. Total commitments under these leases are as follows: 2019 $ 159,976 2020 159,171 2021 158,326 2022 151,696 2023 150,760 Thereafter 507,546 $ 1,287,475

Concentrations

Concentrations	12 Months Ended
	Dec. 31, 2018
Risks And Uncertainties [Abstract]
Concentrations	17. Concentrations: The Company’s revenue is derived from the following customers: 2018 2017 2016 COSCO $ 412,276 $ 387,680 $ 424,806 Yang Ming Marine 235,557 141,518 121,576 MOL 162,646 123,333 117,891 Other 285,852 178,793 213,632 $ 1,096,331 $ 831,324 $ 877,905

Financial instruments

Financial instruments	12 Months Ended
	Dec. 31, 2018
Financial Instruments [Abstract]
Financial instruments	18. Financial instruments: (a) Fair value: The carrying values of cash and cash equivalents, short-term investments, restricted cash, accounts receivable, loans to affiliate and accounts payable and accrued liabilities approximate their fair values because of their short term to maturity. As of December 31, 2018, the fair value of the Company’s revolving and term loan credit facilities, excluding deferred financing fees is $2,875,691,000 (2017 - $1,940,215,000) and the carrying value is $2,944,602,000 (2017 - $2,050,137,000). As of December 31, 2018, the fair value of the Company’s long-term obligations under capital lease, excluding deferred financing fees, is $660,919,000 (2017 - $653,007,000) and the carrying value is $647,664,000 (2017 - $648,840,000). The fair value of the revolving and term loan credit facilities and long-term obligations under capital lease, excluding deferred financing fees, are estimated based on expected principal repayments and interest, discounted by relevant forward rates plus a margin appropriate to the credit risk of the Company. Therefore, the Company has categorized the fair value of these financial instruments as Level 2 in the fair value hierarchy. As of December 31, 2018, the fair value of the Company’s senior unsecured notes is $400,049,000 (2017 – $423,184,000) and the carrying value is $400,396,000 (2017 – $417,925,000). The fair value of senior unsecured notes is calculated based on a quoted price that is readily and regularly available in an active market. Therefore, the Company has categorized the fair value of these financial instruments as Level 1 in the fair value hierarchy. As of December 31, 2018, the fair value of the 2025 Notes is $236,349,000 (2017 – nil) and the carrying value is $166,608,000 (2017 – nil). The Annual Put Right included in the 2025 Notes is considered an embedded derivative that is separately accounted for and is re-measured at fair value at the end of each reporting period. The fair value of the derivative put instrument at each reporting period is derived from the difference between the fair value of the 2025 Notes and the fair value of a similar debt without an Annual Put Right, which is calculated using a trinomial tree. The assumptions used include the estimate of the risk-free yield curve, interest volatility and the Company’s specific credit risk. The fair value of the 2025 Notes and derivative put instrument is determined based on interest rate inputs that are unobservable. Therefore, the Company has categorized the fair value of these derivative financial instruments as Level 3 in the fair value hierarchy. The Company’s interest rate derivative financial instruments are re-measured to fair value at the end of each reporting period. The fair values of the interest rate derivative financial instruments are calculated by using discounted cash flows of both the fixed rate and variable rate interest rate payments. The discount rate is derived from a yield curve created by nationally recognized financial institutions adjusted for the associated credit risk. The fair values of the interest rate derivative financial instruments are determined based on inputs that are readily available in public markets or can be derived from information available in publicly quoted markets. Therefore, the Company has categorized the fair value of these derivative financial instruments as Level 2 in the fair value hierarchy. In 2016 the Company’s vessels held for use with a carrying amount of $619,521,000 were written down to their fair value of $334,326,000 resulting in a non-cash impairment charge of $285,195,000 which was included in earnings for the year ended December 31, 2016. The estimated fair value, measured on a non-recurring basis, of the Company’s vessels held for use is calculated based on discounted cash flows using inputs, other than quoted prices in active markets, that are observable either directly or indirectly. Therefore the Company has categorized the fair value of the vessels as Level 2 in the fair value hierarchy. (b) Interest rate derivative financial instruments: The Company uses interest rate derivative financial instruments, consisting of interest rate swaps and interest rate swaptions, to manage its interest rate risk associated with its variable rate debt. If interest rates remain at their current levels, the Company expects that $27,022,000 would be settled in cash in the next 12 months on instruments maturing after December 31, 2018. The amount of the actual settlement may be different depending on the interest rate in effect at the time settlements are made. As of December 31, 2018, the Company had the following outstanding interest rate derivatives: Fixed per annum rate swapped for LIBOR Notional amount as of December 31, 2018 Maximum notional amount (1) Effective date Ending date 5.8700% $ 539,114 $ 539,114 August 31, 2017 November 28, 2025 (2) 5.4200% 362,437 362,437 September 6, 2007 May 31, 2024 5.6000% 121,600 121,600 June 23, 2010 December 23, 2021 (3) 3.2675% 69,882 69,882 September 8, 2015 September 8, 2020 3.0900% 68,443 68,443 June 5, 2015 June 5, 2020 1.6000% 42,293 42,293 April 7, 2014 March 20, 2019 (1) Over the term of the interest rate swaps, the notional amounts increase and decrease. These amounts represent the peak notional amounts over the remaining term of the swap. (2) Swap counterparty has an early termination right in August 2019 which may require the Company to settle the swap earlier than the termination date. The fair value liability as of December 31, 2018 for this swap is $68,728,000. (3) Prospectively de-designated as an accounting hedge in 2008. During the year ended December 31, 2018, the Company paid nil (2017 - $8,107,000; 2016 – 31,211,000) related to swap terminations. (c) Fair value of asset and liability derivatives: The following provides information about the Company’s derivatives: 2018 2017 Fair value of financial instruments asset Interest rate swaps $ 113 $ — Fair value of financial instruments liability Interest rate swaps 115,853 168,860 Derivative put instrument 11,319 — There are no amounts subject to the master netting arrangements in 2018 and 2017. The following table provides information about gains and losses included in net earnings and reclassified from accumulated other comprehensive loss (“AOCL”) into earnings: 2018 2017 2016 Earnings (loss) on derivatives recognized in net earnings: Change in fair value of financial instruments $ 14,669 $ (12,631 ) $ (29,118 ) Change in fair value of derivative put instrument 821 — — Loss reclassified from AOCL to net earnings (1) Interest expense $ (333 ) $ (1,927 ) $ (3,407 ) Depreciation and amortization (784 ) (932 ) (966 ) (1) The effective portion of changes in unrealized loss on interest rate swaps was recorded in accumulated other comprehensive income until September 30, 2008 when these contracts were voluntarily de-designated as accounting hedges. The amounts in accumulated other comprehensive income are recognized in earnings when and where the previously hedged interest is recognized in earnings. The estimated amount of AOCL expected to be reclassified to net earnings within the next 12 months is approximately $1,051,000.

Guarantor Financial Information

Guarantor Financial Information	12 Months Ended
	Dec. 31, 2018
Supplemental Guarantor Financial Information [Abstract]
Guarantor Financial Information	19. Guarantor financial information: The Fairfax Notes are guaranteed by the following wholly owned subsidiaries of the Company, each a “Guarantor”: • Seaspan 140 Ltd. • Seaspan Holding 140 Ltd. • Seaspan (Asia) Corporation • Seaspan Containership 2180 Ltd. • Seaspan Containership 2181 Ltd. • Seaspan Holdco I Ltd. • Seaspan Holdco II Ltd. • Seaspan Holdco III Ltd. • Seaspan Holdco IV Ltd. • Seaspan Investment I Ltd. • Seaspan Ship Management Ltd. • Seaspan Crew Management Ltd. • Seaspan Management Services Limited • Seaspan Advisory Services Limited The guarantees are full and unconditional and joint and several, subject to certain customary release provisions including (1) the sale, exchange or transfer of a Guarantor in accordance with the terms of the Fairfax Notes (2) upon the legal defeasance or covenant defeasance or discharge of obligations under the Fairfax Notes and (3) merger or consolidation of a Guarantor with Seaspan Corporation or another Guarantor For the purposes of the following footnote, Seaspan Corporation is referred to as “Issuer”. The following supplemental combining and condensed consolidating financial information reflects the Issuer’s separate account, the combined accounts of the Guarantor Subsidiaries and the Non-Guarantor Subsidiaries, the combining and consolidating adjustments and eliminations and the Issuer’s consolidated The following tables present consolidating financial information related to the guarantees of the Fairfax Notes: December 31, 2018 Parent Issuer Guarantors Non-Guarantors Eliminations Consolidated Assets Current assets: Cash and cash equivalents $ 218,903 $ 32,017 $ 106,407 $ — $ 357,327 Short-term investments — 105 2,427 — 2,532 Accounts receivable 1,926 7,707 3,368 — 13,001 Intercompany accounts receivable 169,170 65,173 2,176 (236,519 ) — Loans to affiliate 36,527 — — (36,527 ) — Prepaid expenses and other 24,045 33,388 1,174 (22,088 ) 36,519 Gross investment in lease 44,348 — — — 44,348 Fair value of financial instruments — — 113 — 113 494,919 138,390 115,665 (295,134 ) 453,840 Vessels 3,813,906 294,305 1,818,786 (723 ) 5,926,274 Gross investment in lease 817,631 — — — 817,631 Goodwill — 75,321 — — 75,321 Investment in subsidiaries 951,062 577,305 — (1,528,367 ) — Other assets 100,264 18,978 96,168 (10,479 ) 204,931 $ 6,177,782 $ 1,104,299 $ 2,030,619 $ (1,834,703 ) $ 7,477,997 Liabilities, puttable preferred shares and shareholders' equity Current liabilities: Accounts payable and accrued liabilities $ 29,443 $ 38,620 $ 2,148 $ — $ 70,211 Intercompany accounts payable 48,942 38,499 149,078 (236,519 ) — Loans from affiliate — — 36,527 (36,527 ) — Current portion of deferred revenue 51,191 20,985 4,724 (20,985 ) 55,915 Current portion of long-term debt 619,839 — 102,802 — 722,641 Current portion of long-term obligations under capital lease 32,050 16,334 — — 48,384 Current portion of other long-term liabilities 23,594 — 8,649 — 32,243 805,059 114,438 303,928 (294,031 ) 929,394 Deferred revenue 376,884 — — — 376,884 Long-term debt 1,732,110 — 1,032,790 — 2,764,900 Long-term obligations under capital lease 459,520 131,852 — — 591,372 Other long-term liabilities 169,934 15,530 6,433 (11,740 ) 180,157 Fair value of financial instruments 126,157 — 1,015 — 127,172 3,669,664 261,820 1,344,166 (305,771 ) 4,969,879 Puttable preferred shares 48,139 — — — 48,139 Shareholders’ equity: Share capital 2,102 436,669 526,532 (963,201 ) 2,102 Treasury shares (371 ) — — — (371 ) Additional paid in capital 3,126,457 233,739 116,127 (349,866 ) 3,126,457 Retained earnings (deficit) (645,638 ) 172,071 43,794 (215,865 ) (645,638 ) Accumulated other comprehensive loss (22,571 ) — — — (22,571 ) 2,459,979 842,479 686,453 (1,528,932 ) 2,459,979 $ 6,177,782 $ 1,104,299 $ 2,030,619 $ (1,834,703 ) $ 7,477,997 December 31, 2017 Parent Issuer Guarantors Non-Guarantors Eliminations Consolidated Assets Current assets: Cash and cash equivalents $ 146,328 $ 77,712 $ 29,136 $ — $ 253,176 Short-term investments — 104 — — 104 Accounts receivable 37,303 25,347 — (50,972 ) 11,678 Loans to affiliate 36,100 — — — 36,100 Prepaid expenses and other 29,037 30,348 938 (15,454 ) 44,869 Gross investment in lease 35,478 — — — 35,478 284,246 133,511 30,074 (66,426 ) 381,405 Vessels 3,918,672 286,342 332,202 — 4,537,216 Gross investment in lease 687,896 — — — 687,896 Goodwill — 75,321 — — 75,321 Intercompany accounts receivable (payable) (11,594 ) 11,189 405 — — Investment in subsidiaries 474,713 59,902 — (534,615 ) — Other assets 116,154 81,463 9,104 (10,417 ) 196,304 $ 5,470,087 $ 647,728 $ 371,785 $ (611,458 ) $ 5,878,142 Liabilities and shareholders' equity Current liabilities: Accounts payable and accrued liabilities $ 35,307 $ 75,125 $ 2,789 $ (50,001 ) $ 63,220 Current portion of deferred revenue 54,578 16,104 140 (15,455 ) 55,367 Current portion of long-term debt 239,858 — 17,942 — 257,800 Current portion of long-term obligations under capital lease 28,534 15,378 — — 43,912 Current portion of other long-term liabilities 23,635 — — — 23,635 381,912 106,607 20,871 (65,456 ) 443,934 Deferred revenue 327,641 1,040 — — 328,681 Long-term debt 2,001,504 — 191,329 — 2,192,833 Long-term obligations under capital lease 445,279 149,737 — — 595,016 Other long-term liabilities 195,459 15,273 — (11,346 ) 199,386 Fair value of financial instruments 168,860 — — — 168,860 3,520,655 272,657 212,200 (76,802 ) 3,928,710 Shareholders’ equity: Share capital 1,646 41,789 33,299 (75,088 ) 1,646 Treasury shares (377 ) — — — (377 ) Additional paid in capital 2,752,988 233,739 109,488 (343,227 ) 2,752,988 Retained earnings (deficit) (781,137 ) 99,543 16,798 (116,341 ) (781,137 ) Accumulated other comprehensive loss (23,688 ) — — — (23,688 ) 1,949,432 375,071 159,585 (534,656 ) 1,949,432 $ 5,470,087 $ 647,728 $ 371,785 $ (611,458 ) $ 5,878,142 Year ended December 31, 2018 Parent Issuer Guarantors Non-Guarantors Eliminations Consolidated Revenue $ 876,894 $ 266,906 $ 234,660 $ (282,129 ) $ 1,096,331 Operating expenses: Ship operating 243,311 191,151 42,627 (257,819 ) 219,270 Depreciation and amortization 181,397 13,846 50,558 — 245,801 General and administrative 33,327 21,586 962 (24,310 ) 31,565 Operating leases 111,008 5,501 13,238 — 129,747 569,043 232,084 107,385 (282,129 ) 626,383 Operating earnings 307,851 34,822 127,275 — 469,948 Other expenses (income): Interest expense and amortization of deferred financing fees 149,696 8,514 54,200 (345 ) 212,065 Interest income (3,812 ) (429 ) (301 ) 345 (4,197 ) Acquisition related gain on contract settlement — (2,430 ) — — (2,430 ) Change in fair value of financial instruments (15,720 ) 91 139 — (15,490 ) Equity income on consolidated subsidiaries (102,650 ) (68,582 ) — 171,232 — Equity income on investment — (1,216 ) — — (1,216 ) Other expense (income) 1,539 797 82 — 2,418 29,053 (63,255 ) 54,120 171,232 191,150 Net earnings (loss) $ 278,798 $ 98,077 $ 73,155 $ (171,232 ) $ 278,798 Year ended December 31, 2018 Parent Issuer Guarantors Non-Guarantors Eliminations Consolidated Net earnings (loss) $ 278,798 $ 98,077 $ 73,155 $ (171,232 ) $ 278,798 Amounts reclassified to net earnings during the year relating to cash flow hedging instruments 1,117 — — — 1,117 Comprehensive income (loss) $ 279,915 $ 98,077 $ 73,155 $ (171,232 ) $ 279,915 Year ended December 31, 2017 Parent Issuer Guarantors Non-Guarantors Eliminations Consolidated Revenue $ 797,317 $ 237,056 $ 45,086 $ (248,135 ) $ 831,324 Operating expenses: Ship operating 211,966 180,349 10,864 (219,263 ) 183,916 Cost of services, supervision fees — 1,300 — — 1,300 Depreciation and amortization 173,464 13,317 13,157 — 199,938 General and administrative 52,742 16,115 106 (28,872 ) 40,091 Operating leases 98,175 5,046 12,323 — 115,544 Gain on disposals (1 ) (13,603 ) — — (13,604 ) Expenses related to customer bankruptcy 472 — 541 — 1,013 Vessel impairments — — — — — 536,818 202,524 36,991 (248,135 ) 528,198 Operating earnings 260,499 34,532 8,095 — 303,126 Other expenses (income): Interest expense and amortization of deferred financing fees 97,762 7,795 10,832 — 116,389 Interest income (4,146 ) (412 ) — — (4,558 ) Change in fair value of financial instruments 11,894 737 — — 12,631 Equity income on investment (29,013 ) (12,761 ) — 35,939 (5,835 ) Other expense 8,765 497 — — 9,262 85,262 (4,144 ) 10,832 35,939 127,889 Net earnings (loss) $ 175,237 $ 38,676 $ (2,737 ) $ (35,939 ) $ 175,237 Year ended December 31, 2017 Parent Issuer Guarantors Non-Guarantors Eliminations Consolidated Net earnings (loss) $ 175,237 $ 38,676 $ (2,737 ) $ (35,939 ) $ 175,237 Other comprehensive income: Amounts reclassified to net earnings during the year relating to cash low hedging instruments 2,859 — — — 2,859 Comprehensive income (loss) $ 178,096 $ 38,676 $ (2,737 ) $ (35,939 ) $ 178,096 Year ended December 31, 2016 Parent Issuer Guarantors Non-Guarantors Eliminations Consolidated Revenue $ 835,851 $ 250,606 $ 50,969 $ (259,521 ) $ 877,905 Operating expenses: Ship operating 229,439 185,750 9,967 (232,829 ) 192,327 Cost of services, supervision fees — 7,390 — — 7,390 Depreciation and amortization 188,816 14,172 13,110 — 216,098 General and administrative 42,507 16,189 114 (26,692 ) 32,118 Operating leases 74,175 4,780 6,955 — 85,910 Loss on disposals 31,876 — — — 31,876 Expenses related to customer bankruptcy 7,342 — 12,390 — 19,732 Vessel impairments 285,195 — — — 285,195 859,350 228,281 42,536 (259,521 ) 870,646 Operating earnings (loss) (23,499 ) 22,325 8,433 — 7,259 Other expenses (income): Interest expense and amortization of deferred financing fees 101,009 7,583 11,290 — 119,882 Interest income (8,273 ) (179 ) (3 ) — (8,455 ) Refinancing expenses 1,962 — — — 1,962 Change in fair value of financial instruments 28,616 502 — — 29,118 Equity income on investment (11,176 ) (5,500 ) — 16,488 (188 ) Other expense (income) 3,402 578 — (1 ) 3,979 115,540 2,984 11,287 16,487 146,298 Net earnings (loss) $ (139,039 ) $ 19,341 $ (2,854 ) $ (16,487 ) $ (139,039 ) Year ended December 31, 2016 Parent Issuer Guarantors Non-Guarantors Eliminations Consolidated Net earnings (loss) $ (139,039 ) $ 19,341 $ (2,854 ) $ (16,487 ) $ (139,039 ) Amounts reclassified to net earnings during the year relating to cash flow hedging instruments 4,373 — — — 4,373 Comprehensive income (loss) $ (134,666 ) $ 19,341 $ (2,854 ) $ (16,487 ) $ (134,666 ) Year ended December 31, 2018 Parent Issuer Guarantors Non-Guarantors Eliminations Consolidated Cash from (used in) operating activities $ 223,936 $ 19,832 $ 275,083 $ (35,000 ) $ 483,851 Financing activities: Common shares issued, net of issuance costs — — — — — Preferred shares issued, net of issuance costs 144,375 — — — 144,375 Draws on credit facilities 205,600 — 120,000 — 325,600 Repayment of credit facilities (242,220 ) — (227,442 ) — (469,662 ) 2025 Notes and 2018 Warrants issued 250,000 — — — 250,000 Senior unsecured notes repurchased, including Related expenses (17,529 ) — — — (17,529 ) Draws on long-term obligations under capital lease 46,964 — — — 46,964 Repayment on long-term obligations under capital lease (30,504 ) (17,636 ) — — (48,140 ) Preferred shares redeemed, including related expenses (143,430 ) — — — (143,430 ) Proceeds from exercise of 2018 Warrants 250,000 — — — 250,000 Financing fees (10,057 ) — (6,065 ) — (16,122 ) Intercompany dividends paid — (23,800 ) (12,300 ) 36,100 — Dividends on common shares (49,937 ) — — — (49,937 ) Dividends on preferred shares (65,765 ) — — — (65,765 ) Cash from (used in) financing activities 337,497 (41,436 ) (125,807 ) 36,100 206,354 Investing activities: Expenditures for vessels (157,268 ) (20,003 ) (141,469 ) — (318,740 ) Short-term investments — (1 ) (2,427 ) — (2,428 ) Other assets 891 (4,078 ) 1,770 — (1,417 ) Intercompany dividends received 1,100 — — (1,100 ) — Acquisition of GCI (333,581 ) — — — (333,581 ) Cash acquired from GCI — — 70,121 — 70,121 Cash used in investing activities (488,858 ) (24,082 ) (72,005 ) (1,100 ) (586,045 ) Increase (decrease) in cash and cash equivalents 72,575 (45,686 ) 77,271 — 104,160 Cash, cash equivalents and restricted cash, beginning of period 146,328 85,600 35,308 — 267,236 Cash, cash equivalents and restricted cash, end of period $ 218,903 $ 39,914 $ 112,579 $ — $ 371,396 Year ended December 31, 2017 Parent Issuer Guarantors Non-Guarantors Eliminations Consolidated Cash from (used in) operating activities $ 315,803 $ 10,891 $ (8,257 ) $ 4,782 $ 323,219 Financing activities: Common shares issued, net of issuance costs 118,966 — — — 118,966 Preferred shares issued, net of issuance costs 2,690 — — — 2,690 Repayment of credit facilities (430,271 ) — (24,734 ) — (455,005 ) Draws on long-term obligations under capital lease 176,254 — — — 176,254 Repayment on long-term obligations under capital lease (9,649 ) (16,549 ) — — (26,198 ) Senior unsecured notes issued 80,000 — — — 80,000 Senior unsecured notes repurchased, including related expenses (7,075 ) — — — (7,075 ) Proceeds from sale-leaseback of vessels 90,753 — — — 90,753 Financing fees (9,840 ) 832 784 (2 ) (8,226 ) Dividends on common shares (61,830 ) (4,950 ) — 4,950 (61,830 ) Dividends on preferred shares (64,416 ) — — — (64,416 ) Advances from related parties — 6,667 41,510 (48,177 ) — Cash from (used in) financing activities (114,418 ) (14,000 ) 17,560 (43,229 ) (154,087 ) Investing activities: Expenditures for vessels (329,328 ) (7,076 ) (2,114 ) — (338,518 ) Short-term investments — 307 — — 307 Net proceeds from vessel disposals — 37,091 — — 37,091 Other assets 2,782 (5,365 ) (7 ) 206 (2,384 ) Loans to affiliate 27,376 (2,778 ) — (4,950 ) 19,648 Capital contribution in subsidiary (43,188 ) (3 ) — 43,191 — Cash used in investing activities (342,358 ) 22,176 (2,121 ) 38,447 (283,856 ) Increase (decrease) in cash and cash equivalents (140,973 ) 19,067 7,182 — (114,724 ) Cash, cash equivalents and restricted cash, beginning of period 287,301 66,533 28,126 — 381,960 Cash, cash equivalents and restricted cash, end of period $ 146,328 $ 85,600 $ 35,308 $ — $ 267,236 Year ended December 31, 2016 Parent Issuer Guarantors Non-Guarantors Eliminations Consolidated Cash from (used in) operating activities $ 268,780 $ 45,017 $ 33,711 $ (36,421 ) $ 311,087 Financing activities: Common shares issued, net of issuance costs 95,978 — — — 95,978 Preferred shares issued, net of issuance costs 541,694 — — — 541,694 Draws on credit facilities 220,485 — — — 220,485 Repayment of credit facilities (673,128 ) — (31,162 ) (1 ) (704,291 ) Draws on long-term obligations under capital lease 180,750 — — — 180,750 Repayment on long-term obligations under capital lease (9,182 ) (15,550 ) — (1 ) (24,733 ) Proceeds from sale-leaseback of vessels 354,000 — — — 354,000 Common shares repurchased, including related expenses (8,269 ) — — — (8,269 ) Preferred shares repurchased, including related expenses (333,074 ) — — — (333,074 ) Financing fees (14,912 ) 975 945 — (12,992 ) Dividends on common shares (148,555 ) (23,100 ) (19,366 ) 42,465 (148,556 ) Dividends on preferred shares (54,085 ) — — — (54,085 ) Cash from (used in) financing activities 151,702 (37,675 ) (49,583 ) 42,463 106,907 Investing activities: Expenditures for vessels (324,962 ) (17,891 ) (699 ) — (343,552 ) Short-term investments 7 2,997 — — 3,004 Net proceeds from vessel disposals 12,078 — — — 12,078 Proceeds from sale of leased vessels 20,000 — — — 20,000 Other assets 3,678 (4,896 ) 583 (6,042 ) (6,677 ) Loans to affiliate 49,735 — — — 49,735 Advances to related parties (30,466 ) (12,000 ) — 42,466 — Dividend recevied from subsidary 30,466 12,000 — (42,466 ) — Cash used in investing activities (239,464 ) (19,790 ) (116 ) (6,042 ) (265,412 ) Increase (decrease) in cash and cash equivalents 181,018 (12,448 ) (15,988 ) — 152,582 Cash, cash equivalents and restricted cash, beginning of period 106,283 78,981 44,114 — 229,378 Cash, cash equivalents and restricted cash, end of period $ 287,301 $ 66,533 $ 28,126 $ — $ 381,960

Subsequent events

Subsequent events	12 Months Ended
	Dec. 31, 2018
Subsequent Events [Abstract]
Subsequent events	20. Subsequent events: (a) On January 4, 2019, the Company declared quarterly dividends of $0.496875, $0.515625, $0.512500, $0.492188 and $0.500000 per Series D, Series E, Series G, Series H and Series I preferred share, respectively, representing a total distribution of $17,719,000. The dividends were paid on January 30, 2019 to all shareholders of record on January 29, 2019. (b) On January 4, 2019, the Company declared a quarterly dividend of $0.125 per common share. The dividends were paid on January 30, 2019 to all shareholders of record as of January 14, 2019. (c) On January 15, 2019, $250,000,000 in 2026 Notes and the 2019 Warrants to purchase 38,461,539 Class A common shares at $6.50 per share were issued to Fairfax, where the 2019 Warrants were immediately exercised for additional proceeds of $250,000,000. In February 2019, Fairfax waived its right to call for early redemption of the 2025 Notes on the February 2020 anniversary date and of the 2026 Notes on the January 2020 anniversary date. As the right to call for early redemption of the Fairfax Notes is solely within the control of Fairfax, the Fairfax Notes will be reclassified from long-term debt to current liabilities when they become puttable within one year from period end. (d) On January 16, 2019, the Company made a repayment of $147,000,000 for the remaining principal balance on a revolving credit facility. As a result of the repayment, eight vessels are in the process of becoming unencumbered. (e) During the normal course of business, the Company restructured its charter arrangements with one of its top 5 customers. As a result of such restructurings, the Company expect to receive a settlement payment approximating the remaining payments due on the existing time charters.

Significant accounting polici_2

Significant accounting policies (Policies)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Basis of presentation	(a) Basis of presentation: These consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America and the following accounting policies have been consistently applied in the preparation of the consolidated financial statements. At December 31, 2018, the Company had a working capital deficiency of $475,554,000 which included $320,396,000 of senior unsecured notes maturing in April 2019. This deficit was fully funded in January 2019 by aggregate proceeds of $500,000,000, received on issuance of $250,000,000 in debentures and warrants to purchase 38,461,539 Class A common shares at $6.50 per share, which were immediately exercised.
Principles of consolidation	(b) Principles of consolidation: The accompanying consolidated financial statements include the accounts of Seaspan Corporation and its wholly-owned subsidiaries. All significant intercompany balances and transactions have been eliminated upon consolidation. The Company also consolidates any variable interest entities (“VIEs”) of which it is the primary beneficiary. The primary beneficiary is the enterprise that has both the power to make decisions that most significantly affect the economic performance of the VIE and has the right to receive benefits or the obligation to absorb losses that in either case could potentially be significant to the VIE. The impact of the consolidation of these VIEs is described in note 10. The Company accounts for its investment in companies in which it has significant influence by the equity method. The Company’s proportionate share of earnings is included in earnings and added to or deducted from the cost of the investment.
Foreign currency translation	(c) Foreign currency translation: The functional and reporting currency of the Company is the United States dollar. Transactions involving other currencies are converted into United States dollars using the exchange rates in effect at the time of the transactions. At the balance sheet date, monetary assets and liabilities that are denominated in currencies other than the United States dollar are translated into United States dollars using exchange rates at that date. Exchange gains and losses are included in net earnings.
Cash equivalents	(d) Cash equivalents: Cash equivalents include highly liquid securities with terms to maturity of three months or less when acquired.
Vessels	(e) Vessels: Except as described below, vessels are recorded at their cost, which consists of the purchase price, acquisition and delivery costs, less accumulated depreciation. Vessels purchased from the Company’s predecessor upon completion of the Company’s initial public offering in 2005 were initially recorded at the predecessor’s carrying value. Vessels under construction include deposits, installment payments, interest, financing costs, transaction fees, construction design, supervision costs, and other pre-delivery costs incurred during the construction period. Depreciation is calculated on a straight-line basis over the estimated useful life of each vessel, which is 30 years from the date of completion. The Company calculates depreciation based on the estimated remaining useful life and the expected salvage value of the vessel. Vessels that are held for use are evaluated for impairment when events or circumstances indicate that their carrying amounts may not be recoverable from future undiscounted cash flows. Such evaluations include the comparison of current and anticipated operating cash flows, assessment of future operations and other relevant factors. If the carrying amount of the vessel exceeds the estimated net undiscounted future cash flows expected to be generated over the vessel’s remaining useful life, the carrying amount of the vessel is reduced to its estimated fair value.
Dry-dock activities	(f) Dry-dock activities: Classification rules require that vessels be dry-docked for inspection including planned major maintenance and overhaul activities for ongoing certification. The Company generally dry-docks its vessels once every five years. Dry-docking activities include the inspection, refurbishment and replacement of steel, engine components, electrical, pipes and valves, and other parts of the vessel. The Company uses the deferral method of accounting for dry-dock activities whereby capital costs incurred are deferred and amortized on a straight-line basis over the period until the next scheduled dry-dock activity.
Goodwill	(g) Goodwill: Goodwill represents the excess of the purchase price of an acquired enterprise over the fair value assigned to assets acquired and liabilities assumed in a business combination. Goodwill is not amortized, but reviewed for impairment annually or more frequently if impairment indicators arise. When goodwill is reviewed for impairment, the Company may elect to assess qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount, including goodwill. Alternatively, the Company may bypass this step and use a fair value approach to identify potential goodwill impairment and, when necessary, measure the amount of impairment. The Company uses a discounted cash flow model to determine the fair value of reporting units, unless there is a readily determinable fair market value.
Deferred financing fees	(h) Deferred financing fees: Deferred financing fees represent the unamortized costs incurred on issuance of the Company’s credit and lease arrangements and are presented as a direct deduction from the related debt liability when available. Amortization of deferred financing fees on credit facilities is provided on the effective interest rate method over the term of the facility based on amounts available under the facilities. Amortization of deferred financing fees on long-term obligations under capital leases is provided on the effective interest rate method over the term of the underlying obligation and amortization of deferred financing fees on operating leases is provided on a straight line basis over the lease term. Amortization of deferred financing fees is recorded as interest expense.
Revenue recognition	( i ) Revenue recognition: The Company derives its revenue primarily from the charter of its vessels. Each charter agreement is evaluated and classified as an operating or capital lease. For time charters classified as operating leases, revenue for the lease and service components is recognized each day the vessel is on-hire and performance obligations are satisfied. For capital leases that are sales-type leases, the difference between the gross investment in the lease and the present value of its components, i.e. the minimum lease payments and the estimated residual value, is recorded as unearned lease interest income. The discount rate used in determining the present values is the interest rate implicit in the lease. The present value of the minimum lease payments, computed using the interest rate implicit in the lease, is recorded as the sales price, from which the carrying value of the vessel at the commencement of the lease is deducted in order to determine the profit or loss on sale. Unearned lease interest income is amortized to income over the period of the lease so as to produce a constant periodic rate of return on the net investment in lease. Revenue from vessel management is recognized each day the vessel is managed, when services are provided and the performance obligations are satisfied.
Leases	(j) Leases: Leases, where the Company is the lessee, are classified as either capital leases or operating leases based on an assessment of the terms of the lease. For sale-leaseback transactions, the Company, as seller-lessee, would recognize a gain or loss over the term of the lease as an adjustment to the lease expense, unless the loss is required to be recognized immediately by accounting standards. The term of the lease includes the fixed non-cancelable term of the lease plus all renewal periods where that renewal appears reasonably assured.
Derivative financial instruments	(k) Derivative financial instruments: From time to time, the Company utilizes derivative financial instruments. All of the Company’s derivatives are measured at their fair value at the end of each period. Derivatives that mature within one year are classified as current. For derivatives not designated as accounting hedges, changes in their fair value are recorded in earnings. The Company’s hedging policies permit the use of various derivative financial instruments to manage interest rate risk. The Company has entered into interest rate swaps and swaptions to reduce the Company’s exposure to changing interest rates on its credit facilities. The Company had previously designated certain of its interest rate swaps as accounting hedges and applied hedge accounting to those instruments. While hedge accounting was applied, the effective portion of the unrealized gains or losses on those designated interest rate swaps was recorded in other comprehensive loss. By September 30, 2008, the Company de-designated all of the interest rate swaps it had accounted for as hedges to that date. Subsequent to their de-designation dates, changes in their fair value are recorded in earnings. The Company evaluates whether the occurrence of any of the previously hedged interest payments are considered to be remote. When the previously hedged interest payments are not considered remote of occurring, unrealized gains or losses in accumulated other comprehensive income associated with the previously designated interest rate swaps are recognized in earnings when and where the interest payments are recognized. If such interest payments are identified as being remote, the accumulated other comprehensive income balance pertaining to these amounts is reversed through earnings immediately.
Fair value measurement	(l) Fair value measurement: Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability (i.e. the “exit price”) in an orderly transaction between market participants at the measurement date. The hierarchy is broken down into three levels based on the observability of inputs as follows: • Level 1 — Valuations based on quoted prices in active markets for identical assets or liabilities that the Company has the ability to access. Valuation adjustments and block discounts are not applied to Level 1 instruments. Since valuations are based on quoted prices that are readily and regularly available in an active market, valuation of these products does not entail a significant degree of judgment. • Level 2 — Valuations based on one or more quoted prices in markets that are not active or for which all significant inputs are observable, either directly or indirectly. • Level 3 — Valuations based on inputs that are unobservable and significant to the overall fair value measurement.
Share-based compensation	(m) Share-based compensation: The Company has granted restricted shares, phantom share units, performance share units, SARs, restricted stock units and stock options to certain of its officers, members of management and directors as compensation. Compensation cost is measured at the grant date fair values as follows: • Restricted shares, phantom share units and restricted stock units are measured based on the quoted market price of the Company’s Class A common shares on the date of the grant. • SARs and performance share units are measured at fair value using the Monte Carlo model. • Stock options are measured at fair value using the Black-Scholes model. The fair value of each grant is recognized on a straight-line basis over the requisite service period. The Company accounts for forfeitures in share-based compensation expense as they occur.
Earnings per share	(n) Earnings per share: The treasury stock method is used to compute the dilutive effect of the Company’s share-based compensation awards. Under this method, the incremental number of shares used in computing diluted earnings per share (“EPS”) is the difference between the number of shares assumed issued and purchased using assumed proceeds. The if-converted method is used to compute the dilutive effect of the Company’s convertible preferred shares. Under the if-converted method, dividends applicable to the convertible preferred shares are added back to earnings attributable to common shareholders, and the convertible preferred shares and paid-in kind dividends are assumed to have been converted at the share price applicable at the end of the period. The if-converted method is applied to the computation of diluted EPS only if the effect is dilutive. The cumulative dividends applicable to the Series D, E, F, G, H and I preferred shares reduce the earnings available to common shareholders, even if not declared.
Use of estimates	(o) Use of estimates: The preparation of consolidated financial statements requires management to make estimates and assumptions that affect the: • reported amounts of assets and liabilities, • disclosure of contingent assets and liabilities at the balance sheet dates and • reported amounts of revenue and expenses during the reporting fiscal periods. Areas where accounting judgments and estimates are significant to the Company and where actual results could differ from those estimates, include the: • assessment of going concern; • assessment of vessel useful lives; • expected vessel salvage values; • recoverability of the carrying value of vessels which are subject to future market events; • carrying value of goodwill; and • fair value of interest rate swaps, other derivative financial instruments and share-based awards.
Comparative information	(p) Comparative information: Certain information has been reclassified to conform to the financial statement presentation adopted for the current year.
Recently adopted accounting pronouncements	(q) Recently adopted accounting pronouncements: Revenue from Contracts with Customers Effective January 1, 2018, the Company adopted Accounting Standards Update (“ASU”) 2014-09, “Revenue from Contracts with Customers”, that introduced a new five-step revenue recognition model to determine how an entity should recognize revenue related to the transfer of goods or services to customers in an amount that reflects the consideration the entity is entitled to receive for those goods or services. The Company’s revenue is comprised primarily of time charter revenue and interest income from leasing. The time charter revenue includes a lease element, which is evaluated under Accounting Standards Codification (“ASC”) 840 “Leases”, and a service element, which is evaluated under ASU 2014-09. Under previous accounting standards, service revenue was recognized when the amounts were fixed or determinable, services had been rendered and collectability was reasonably assured. Under ASU 2014-09, recognition of such service revenue occurs when the services are provided and the performance obligations are satisfied. The Company evaluated the service revenue under ASU 2014-09 and determined that the amounts recognized and the pattern of recognition are substantially the same as under the previous revenue standard. The Company adopted ASU 2014-09 using the modified retrospective method and applied the new standard only to contracts not completed as of January 1, 2018. There is no impact on the Company’s consolidated financial statements. Definition of a Business Effective January 1, 2018, the Company adopted ASU 2017-01, “Clarifying the Definition of a Business”, which provides a new framework for determining whether transactions should be accounted for as acquisitions of assets or businesses. The Company analyzed its March 13, 2018 acquisition of Greater China Intermodal Investments LLC (“GCI”) under this standard (see note 3). Statement of Cash Flows – Restricted cash Effective January 1, 2018, the Company adopted ASU 2016-18, “Statement of Cash Flows – Restricted Cash”, which requires that a statement of cash flows explain the change during the period in cash, cash equivalents and restricted cash. In addition, the amounts of restricted cash and nature of the restrictions are required to be disclosed. The Company’s consolidated statements of cash flows and supplemental cash flow note reflect the changes as required. Equity-Linked Financial Instruments with Down Round Features Effective January 1, 2018, the Company elected to early adopt ASU 2017-11, “Earnings Per Share”, which changes the classification analysis of certain equity-linked financial instruments with down round features. When determining whether certain financial instruments should be classified as liabilities or equity instruments, a down round feature no longer precludes equity classification when assessing whether the instrument is indexed to an entity’s own stock. The standard is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018, with early adoption permitted. There is no impact on the Company’s consolidated financial statements. (r) Recent accounting pronouncements: Leases In February 2016, the Financial Accounting Standards Board (“FASB”) issued ASU 2016-02, “Leases”, which requires lessees to recognize all rights and obligations created by those leases, including operating leases, with a term greater than 12 months on the balance sheet. The accounting for lessors will remain largely unchanged from the existing accounting standards. The standard is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Under ASU 2016-02, each lease agreement will be evaluated to identify the lease components and non-lease components at lease inception. The total consideration in the lease agreement will be allocated to the lease and non-lease components based on their relative standalone selling prices. Lessors will continue to recognize the lease revenue component using an approach that is substantially equivalent to existing guidance for operating leases (straight-line basis). In July 2018, the FASB issued ASU 2018-11, “Leases – Targeted Improvements” that allows lessors to elect, as a practical expedient, to not separate lease and non-lease components and allows these components to be accounted for as a single lease component if both (1) the timing and pattern of transfer to the lessee of the lease component and the related non-lease component are the same and (2) the lease component, if accounted for separately, would be classified as an operating lease. In addition, a company is permitted to use its effective date as the date of initial application. Therefore, a company electing this option will not restate comparative period financial information, will not make the new required lease disclosures in comparative periods beginning before the effective date and will recognize its cumulative effect transition adjustment as of the effective date. Under the practical expedient mentioned above, it is expected that time charter revenue and service revenue will be presented under a single lease component presentation. The Company will elect this expedient upon adoption. The Company intends to adopt ASU 2016-02 on January 1, 2019 using the modified retrospective method, whereby a cumulative effect adjustment will be made as of that day with no retrospective effect. The Company also intends to elect to apply the package of practical expedients such that for any expired or existing leases it will not reassess lease classification, initial direct costs or whether any expired or existing contracts are or contain leases. The adoption of ASU 2016-02 will result in a change in the accounting method for certain of the Company’s sale-leaseback transactions and office leases. Under ASU 2016-02, the Company will recognize a right-of-use asset and a lease liability on the balance sheet for these sale-leaseback transactions and office leases of approximately $1.1 billion based on the present value of the future minimum lease payments, whereas currently no right-of-use asset or lease liability is recognized. The existing deferred gain related to the sale-leaseback transactions of $0.2 billion will be eliminated through a credit directly to retained earnings. The impact on the Company’s consolidated balance sheet will be an increase to its assets and liabilities. Operating lease expense related to these sale-leaseback transactions and office leases will be recognized on a straight-line basis over the term of the lease, adjusted for changes in interest rate-based variable lease payments in the period of change. This will result in a timing difference in expense recognition on the consolidated statement of operations. The adoption of ASU 2016-02 will require the Company to complete its lease classification assessment at lease commencement rather than when a lease is entered into. Historically, for charters that were negotiated concurrently with the construction of the related vessels, the fair value of the constructed asset was presumed to be its newbuilding cost. If such charters were classified as direct financing leases at the time the lease was entered into, no gain or loss was recognized subsequently on commencement of the charter. On adoption of ASU 2016-02, the fair value of the vessel will be determined based on information available at the lease commencement date, rather than lease inception date, and any difference in the fair value of the vessel upon commencement of the charter and its carrying value will be recognized as a gain or loss upon commencement of the charter. Measurement of credit loss In June 2016, FASB issued ASU 2016-13, “Measurement of Credit Loss on financial Instruments”. ASU 2016-13 replaces the current incurred loss impairment methodology with the expected credit loss impairment model (“CECL”), which requires consideration of a broader range of reasonable and supportable information to estimate expected credit losses over the life of the instrument instead of only when losses are incurred. This standard applies to financial assets measured at amortized cost basis and investments in leases recognized by the lessor. The revised guidance is effective for fiscal years, and interim periods within those years, beginning after December 15, 2019. Early adoption is permitted for fiscal years, and interim period within those years, beginning after December 15, 2018. The Company is evaluating the revised guidance to determine the impact it will have on its consolidated financial statements. Fair value measurement In August 2015, FASB issued ASU 2018-13, “Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement”. ASU 2018-13 revises fair value disclosures, including requiring additional information on changes in unrealized gains and losses and significant unobservable inputs as it relates to Level 3 fair value measurements. The revised guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. Early adoption is permitted upon issuance of this update. The Company is evaluating the revised guidance to determine the impact it will have on its consolidated financial statements.

Acquisition of GCI (Tables)

Acquisition of GCI (Tables)	12 Months Ended
	Dec. 31, 2018
Business Combinations [Abstract]
Schedule of Aggregate Purchase Price	The aggregate purchase price was $498,050,000, comprised of: Cash $ 331,904 1,986,449 of the Company's Series D preferred shares 47,158 2,514,996 of the Company's Class A common shares 13,908 Settlement of intercompany balances 41,279 Carrying value of previously held equity interest 61,891 Transaction fees 1,910 Aggregate purchase price $ 498,050
Summary of Value of Attributed to Identifiable Assets Acquired and Liabilities Assumed	The following table summarizes the value attributed to the identifiable assets acquired and liabilities assumed; Cash and cash equivalents $ 70,121 Current assets 5,316 Vessels 1,369,628 Vessels under construction 28,924 Other assets 107,407 Total assets acquired 1,581,396 Debt assumed 1,038,081 Current liabilities 31,115 Other long-term liabilities 14,150 Net assets acquired $ 498,050

Related party transactions (Tab

Related party transactions (Tables)	12 Months Ended
	Dec. 31, 2018
Related Party Transactions [Abstract]
Schedule of Income or Expenses with Related Parties	(b) The Company incurred the following income or expenses with related parties: 2018 2017 2016 Fees paid: Interest expense $ 19,380 $ — $ — Arrangement fees — 1,827 7,598 Transaction fees — 2,262 6,317 Income earned: Interest income 427 2,677 7,513 Management fees 914 4,447 4,266 Supervision fees — 1,300 7,800

Gross investment in lease (Tabl

Gross investment in lease (Tables)	12 Months Ended
	Dec. 31, 2018
Leases [Abstract]
Schedule of Gross Investment In Lease	2018 2017 Gross investment in lease $ 861,979 $ 723,374 Current portion (44,348 ) (35,478 ) $ 817,631 $ 687,896

Vessels (Tables)

Vessels (Tables)	12 Months Ended
	Dec. 31, 2018
Property Plant And Equipment [Abstract]
Schedule of Vessels	December 31, 2018 Cost Accumulated depreciation Net book value Vessels $ 8,004,011 $ 2,077,737 $ 5,926,274 December 31, 2017 Cost Accumulated depreciation Net book value Vessels $ 6,116,091 $ 1,725,237 $ 4,390,854 Vessels under construction 146,362 — 146,362 Vessels $ 6,262,453 $ 1,725,237 $ 4,537,216

Other assets (Tables)

Other assets (Tables)	12 Months Ended
	Dec. 31, 2018
Other Assets [Abstract]
Schedule of Other Assets	2018 2017 Equity investment in affiliate (a) $ — $ 60,683 Intangible assets (b) 111,968 27,486 Deferred dry-dock (c) 36,660 42,536 Deferred financing fees (c) 17,286 19,484 Restricted cash (d) 14,069 14,060 Capital assets 600 3,268 Other 24,348 28,787 Other assets $ 204,931 $ 196,304 (a) Equity investment in affiliate In March 2011, the Company entered into an agreement to participate in GCI, an investment vehicle established by an affiliate of The Carlyle Group. The Company accounted for its 10.8% investment in GCI using the equity method. As at December 31, 2017, the equity investment of $60,683,000 was comprised of the Company’s capital contribution of $51,406,000 and its cumulative equity income on investment of $9,277,000. On March 13, 2018, the Company acquired the remaining 89.2% (note 3). (b) Intangible assets Intangible assets primarily comprises of the fair value of time charter contracts acquired. In connection with the acquisition of GCI on March 13, 2018 (note 3), the Company recognized $100,750,000 for the fair value of time charter contracts. During the year ended December 31, 2018, the Company recorded $16,269,000 of amortization expense related to all acquired contracts. The future amortization expense related to the fair value of all time charter contracts acquired is approximated as follows: 2019 $ 19,739 2020 19,223 2021 17,658 2022 16,090 2023 12,390 Thereafter 25,199 $ 110,299 (c) Deferred charges During the years ended December 31, 2018 and 2017, changes in deferred charges were as follows: Dry-docking Financing fees December 31, 2016 $ 49,037 $ 19,062 Costs incurred 8,708 2,554 Amortization expensed (1) (15,209 ) (2,132 ) December 31, 2017 $ 42,536 $ 19,484 Costs incurred 10,756 27 Amortization expensed (1) (16,632 ) (2,225 ) December 31, 2018 $ 36,660 $ 17,286 _____________ (1) (d) Restricted cash Restricted cash represents amounts required to be set aside by contractual agreement for two of the Company’s capital leases. The restriction will be removed upon termination of the charter agreements.

Deferred revenue (Tables)

Deferred revenue (Tables)	12 Months Ended
	Dec. 31, 2018
Deferred Revenue Disclosure [Abstract]
Deferred Revenue	2018 2017 Deferred revenue on time charters $ 22,318 $ 26,907 Deferred interest on lease receivable 410,481 355,451 Other deferred revenue — 1,690 Deferred revenue 432,799 384,048 Current portion of deferred revenue (55,915 ) (55,367 ) Deferred revenue $ 376,884 $ 328,681

Long-term debt (Tables)

Long-term debt (Tables)	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Schedule of Long-Term Debt	2018 2017 Long-term debt: Revolving credit facilities (a) (c) $ 788,198 $ 854,121 Term loan credit facilities (b) (c) 2,158,743 1,196,016 Senior unsecured notes (d) 400,396 417,925 2025 Notes (e) 250,000 — 3,597,337 2,468,062 Fair value adjustment on term loan credit facilities (b) (2,339 ) — Debt discount on 2025 Notes (e) (83,392 ) — Deferred financing fees (24,065 ) (17,429 ) Long-term debt 3,487,541 2,450,633 Current portion of long-term debt (722,641 ) (257,800 ) Long-term debt $ 2,764,900 $ 2,192,833
Schedule of Future Minimum Repayments of Revolving Credit Facilities and Term Loans	The following is a schedule of future minimum repayments of revolving credit facilities as of December 31, 2018: 2019 $ 197,320 2020 53,281 2021 56,416 2022 422,941 2023 58,240 $ 788,198 The following is a schedule of future minimum repayments of Term Loans as of December 31, 2018: 2019 $ 207,194 2020 265,270 2021 412,091 2022 277,719 2023 517,640 Thereafter 478,829 $ 2,158,743

Long-term obligations under c_2

Long-term obligations under capital lease (Tables)	12 Months Ended
	Dec. 31, 2018
Capital Lease Obligations [Abstract]
Schedule of Long-term Obligations Under Capital Lease	2018 2017 Long-term obligations under capital lease $ 647,664 $ 648,840 Deferred financing fees (7,908 ) (9,912 ) Long-term obligations under capital lease 639,756 638,928 Current portion of long-term obligations under capital lease (48,384 ) (43,912 ) Long-term obligations under capital lease $ 591,372 $ 595,016
Repayments Due for Obligations Under Capital Lease	Based on amounts funded, payments due to the lessors for all ten vessels would be as follows: 2019 $ 59,086 2020 150,401 2021 46,352 2022 46,808 2023 88,552 Thereafter 281,370 672,569 Less amounts representing interest (24,905 ) 647,664

Other long-term liabilities (Ta

Other long-term liabilities (Tables)	12 Months Ended
	Dec. 31, 2018
Other Liabilities Disclosure [Abstract]
Schedule of Other Long-Term Liabilities	2018 2017 Deferred gain on sale-leasebacks (a) $ 181,053 $ 203,737 Other 31,347 19,284 Other long-term liabilities 212,400 223,021 Current portion of other long-term liabilities (32,243 ) (23,635 ) Other long-term liabilities $ 180,157 $ 199,386 (a) During the year ended December 31, 2018, the Company did not enter into any sale-leaseback transactions. In May 2017, the Company entered into a sale-leaseback transaction with Asian special purpose companies, or SPCs, for one 14000 TEU vessel, the YM Wind, for gross proceeds of $144,000,000. Under the transaction, the Company sold the vessel to the SPCs and leased the vessel back from the SPCs over a term of 12 years, with an option to purchase the vessel at the 9.5 year anniversary for a pre-determined fair value purchase price. The sale of this vessel resulted in a deferred gain totaling approximately $31,611,000 which is being recorded as a reduction of the related operating lease expense over the 12 year lease term.

Puttable Preferred Shares and_2

Puttable Preferred Shares and Share Capital (Tables)	12 Months Ended
	Dec. 31, 2018
Equity [Abstract]
Schedule of Preferred Shares Outstanding	At December 31, 2018, the Company had the following preferred shares outstanding: Liquidation preference Shares Dividend rate Redemption by Company December December Series Authorized Issued per annum permitted on or after 2018 2017 A 315,000 — ― ― $ ― $ ― B 260,000 — ― ― ― ― C 40,000,000 — ― ― ― ― D 20,000,000 7,017,313 (2) 7.95 % January 30, 2018 (2) 175,433 (1) 125,772 E 15,000,000 5,415,937 8.25 % February 13, 2019 (2) 135,398 135,398 F 20,000,000 ― (3) ― ― ― (3) 140,000 G 15,000,000 7,800,800 8.20 % June 16, 2021 (2) 195,020 195,020 H 15,000,000 9,025,105 7.875 % August 11, 2021 (2) 225,628 225,628 I 6,000,000 6,000,000 8.00 % October 30, 2023 (2) 150,000 ― R 1,000,000 ― ― ― ― ― __________ (1) Includes 1,986,449 puttable preferred shares, with aggregate liquidation preference of $49,661,000. (2) Redeemable by the Company, in whole or in part, at a redemption price equal to its liquidation preference of $25.00 per share plus unpaid dividends. The preferred shares are not convertible into common shares and are not redeemable by the holder. (3) In July 2018, the Company redeemed all Series F preferred shares for $140,000,000 plus accrued dividends of $3,430,000.

Earnings per share (Tables)

Earnings per share (Tables)	12 Months Ended
	Dec. 31, 2018
Earnings Per Share [Abstract]
Schedule of Reconciliation of Numerator and Denominator Used in Basic and Diluted EPS Computations	Earnings Shares Per For the year ended December 31, 2018 (numerator) (denominator) amount Net earnings $ 278,798 Less preferred share dividends: Series D (14,610 ) Series E (11,170 ) Series F (8,289 ) Series G (15,992 ) Series H (17,768 ) Series I (3,400 ) Basic EPS: Earnings attributable to common shareholders $ 207,569 154,848,000 $ 1.34 Effect of dilutive securities: Share-based compensation — 91,000 2018 Warrants and New Warrants — 3,129,000 Diluted EPS (1) Earnings attributable to common shareholders (1) $ 207,569 158,068,000 $ 1.31 Earnings Shares Per For the year ended December 31, 2017 (numerator) (denominator) amount Net earnings $ 175,237 Less preferred share dividends: Series D (9,925 ) Series E (11,100 ) Series F (9,730 ) Series G (15,990 ) Series H (17,731 ) Basic EPS: Earnings attributable to common shareholders $ 110,761 117,524,000 $ 0.94 Effect of dilutive securities: Share-based compensation — 81,400 Diluted EPS (1) Earnings attributable to common shareholders (1) $ 110,761 117,605,400 $ 0.94 Earnings Shares Per For the year ended December 31, 2016 (numerator) (denominator) amount Net loss $ (139,039 ) Less preferred share dividends: Series C (14,420 ) Series D (9,900 ) Series E (11,077 ) Series F (6,055 ) Series G (7,404 ) Series H (6,841 ) Basic EPS: Loss attributable to common shareholders $ (194,736 ) 102,869,000 $ (1.89 ) Effect of dilutive securities: Share-based compensation — — Diluted EPS (1) Earnings attributable to common shareholders (1) $ (194,736 ) 102,869,000 $ (1.89 ) __________________ (1) The unexercised share-based compensation awards and convertible Series F preferred shares are not included in the computation of diluted EPS when their effects are anti-dilutive.

Share-based compensation (Table

Share-based compensation (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Summary of Outstanding Restricted Shares, Phantom Share Units, SARs and Restricted Stock Units	A summary of the Company’s outstanding restricted shares, phantom share units, SARs and restricted stock units as of and for the years ended December 31, 2018, 2017 and 2016 are presented below: Restricted shares Phantom share units Stock appreciation rights Restricted stock units Stock options Number W.A. Number W.A. grant Number of W.A. grant Number W.A. grant Number W.A. grant of shares date FV of units date FV SARs date FV of units date FV of options date FV December 31, 2015 44,947 $ 18.39 $ 647,001 $ 14.73 $ 5,876,811 $ 2.30 $ 32,828 $ 21.03 $ — $ — Granted 56,861 15.48 60,000 18.84 — — 528,232 16.57 — — Vested (44,947 ) 18.39 — — — — (37,374 ) 18.56 — — Exchanged — — (70,000 ) 19.91 — — — — — — Expired — — — — (3,438,614 ) 2.26 — — — — Cancelled — — — — — — (299 ) 20.21 — — December 31, 2016 56,861 15.48 637,001 14.55 2,438,197 2.29 523,387 16.71 — — Granted 107,270 8.97 90,000 6.85 — — 88,293 5.93 — — Vested (56,861 ) 15.48 — — — — (537,216 ) 16.16 — — Expired — — — — (1,929,260 ) 2.00 — — — — Cancelled (12,737 ) 9.53 — — (22,963 ) 3.40 (3,280 ) 9.16 — — December 31, 2017 94,533 8.89 727,001 13.60 485,974 3.40 71,184 7.80 — — Granted 664,326 7.68 30,000 6.86 — — 109,248 9.73 500,000 7.20 Vested (119,509 ) 8.52 — — — — (83,220 ) 9.87 — — Exchanged — — (113,333 ) 18.80 — — — — — — Expired — — — — (485,974 ) 3.40 — — — — Cancelled (53,608 ) 7.10 (76,666 ) 7.90 — — (12,441 ) 7.28 — — December 31, 2018 585,742 $ 7.76 567,002 $ 12.97 — $ — 84,771 $ 8.33 500,000 $ 7.20

Other Information (Tables)

Other Information (Tables)	12 Months Ended
	Dec. 31, 2018
Additional Financial Information Disclosure [Abstract]
Schedule of Accounts Payable and Accrued Liabilities	The principal components of accounts payable and accrued liabilities are: 2018 2017 Due to related parties (note 4) $ — $ 1,386 Accrued interest 20,276 14,614 Accounts payable and other accrued liabilities 49,935 47,220 $ 70,211 $ 63,220
Schedule of Supplemental Cash Flow Information	(b) Supplemental cash flow information: 2018 2017 2016 Interest paid on debt $ 194,316 $ 111,180 $ 109,272 Interest received 3,737 6,829 8,041 Undrawn credit facility fee paid 619 2,444 2,856 Non-cash transactions: Dividend reinvestment 22,807 21,785 4,359 Arrangement and transaction fees settled in shares (note 14) 2,326 4,199 6,393 Acquisition of time charters through novation from GCI — — 16,200 Acquisition of GCI Subsidiaries through settlement of loans to affiliate — — 107,500 Capital contribution through settlement of loans to affiliate — 6,667 — Carrying value of previously held equity in GCI settled on acquisition (note 3) 61,891 — — Issuance of Class A common shares on acquisition (note 3) 13,908 — — Issuance of New Warrants (note 4) 67,523 — — Issuance of Series D preferred shares on acquisition (note 3) 47,158 — — Offset of swaption against swap liability termination — 10,852 — Recognition of fair value of bareboat charters — — 16,200 Repayment of debt from sale-leaseback transaction proceeds — 53,247 — Settlement of GCI transaction fees paid by the Company (note 3) 15,224 — — Settlement of loans to affiliate, accrued interest and other intercompany balances on acquisition (note 3) 38,849 — —
Schedule of Reconciliation of Cash, Cash Equivalents and Restricted Cash	The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the consolidated balance sheets that sum to the amounts shown in the consolidated statements of cash flows: 2018 2017 2016 Cash and cash equivalents $ 357,327 $ 253,176 $ 367,901 Restricted cash included in other assets (note 8) 14,067 14,060 14,059 Total cash, cash equivalents and restricted cash $ 371,394 $ 267,236 $ 381,960

Commitments and contingencies (

Commitments and contingencies (Tables)	12 Months Ended
	Dec. 31, 2018
Commitments And Contingencies Disclosure [Abstract]
Schedule of Future Minimum Revenues to be Received on Committed Agreements	At December 31, 2018, the minimum future revenues to be received on committed time-charter party agreements and interest income from direct financing leases are as follows: 2019 $ 1,094,608 2020 977,926 2021 844,261 2022 688,537 2023 469,754 Thereafter 751,473 $ 4,826,559
Schedule of Commitment Under Operating Leases	Total commitments under these leases are as follows: 2019 $ 159,976 2020 159,171 2021 158,326 2022 151,696 2023 150,760 Thereafter 507,546 $ 1,287,475

Concentrations (Tables)

Concentrations (Tables)	12 Months Ended
	Dec. 31, 2018
Risks And Uncertainties [Abstract]
Schedule of Revenue Derived from Customers	The Company’s revenue is derived from the following customers: 2018 2017 2016 COSCO $ 412,276 $ 387,680 $ 424,806 Yang Ming Marine 235,557 141,518 121,576 MOL 162,646 123,333 117,891 Other 285,852 178,793 213,632 $ 1,096,331 $ 831,324 $ 877,905

Financial instruments (Tables)

Financial instruments (Tables)	12 Months Ended
	Dec. 31, 2018
Financial Instruments [Abstract]
Schedule of Outstanding Interest Rate Derivatives	As of December 31, 2018, the Company had the following outstanding interest rate derivatives: Fixed per annum rate swapped for LIBOR Notional amount as of December 31, 2018 Maximum notional amount (1) Effective date Ending date 5.8700% $ 539,114 $ 539,114 August 31, 2017 November 28, 2025 (2) 5.4200% 362,437 362,437 September 6, 2007 May 31, 2024 5.6000% 121,600 121,600 June 23, 2010 December 23, 2021 (3) 3.2675% 69,882 69,882 September 8, 2015 September 8, 2020 3.0900% 68,443 68,443 June 5, 2015 June 5, 2020 1.6000% 42,293 42,293 April 7, 2014 March 20, 2019 (1) Over the term of the interest rate swaps, the notional amounts increase and decrease. These amounts represent the peak notional amounts over the remaining term of the swap. (2) Swap counterparty has an early termination right in August 2019 which may require the Company to settle the swap earlier than the termination date. The fair value liability as of December 31, 2018 for this swap is $68,728,000. (3) Prospectively de-designated as an accounting hedge in 2008.
Schedule of Derivatives	The following provides information about the Company’s derivatives: 2018 2017 Fair value of financial instruments asset Interest rate swaps $ 113 $ — Fair value of financial instruments liability Interest rate swaps 115,853 168,860 Derivative put instrument 11,319 —
Schedule of Gains and Losses Reclassified from Accumulated Other Comprehensive Loss into Earnings	The following table provides information about gains and losses included in net earnings and reclassified from accumulated other comprehensive loss (“AOCL”) into earnings: 2018 2017 2016 Earnings (loss) on derivatives recognized in net earnings: Change in fair value of financial instruments $ 14,669 $ (12,631 ) $ (29,118 ) Change in fair value of derivative put instrument 821 — — Loss reclassified from AOCL to net earnings (1) Interest expense $ (333 ) $ (1,927 ) $ (3,407 ) Depreciation and amortization (784 ) (932 ) (966 ) (1) The effective portion of changes in unrealized loss on interest rate swaps was recorded in accumulated other comprehensive income until September 30, 2008 when these contracts were voluntarily de-designated as accounting hedges. The amounts in accumulated other comprehensive income are recognized in earnings when and where the previously hedged interest is recognized in earnings.

Guarantor Financial Informati_2

Guarantor Financial Information (Tables)	12 Months Ended
	Dec. 31, 2018
Supplemental Guarantor Financial Information [Abstract]
Consolidated Balance Sheets	December 31, 2018 Parent Issuer Guarantors Non-Guarantors Eliminations Consolidated Assets Current assets: Cash and cash equivalents $ 218,903 $ 32,017 $ 106,407 $ — $ 357,327 Short-term investments — 105 2,427 — 2,532 Accounts receivable 1,926 7,707 3,368 — 13,001 Intercompany accounts receivable 169,170 65,173 2,176 (236,519 ) — Loans to affiliate 36,527 — — (36,527 ) — Prepaid expenses and other 24,045 33,388 1,174 (22,088 ) 36,519 Gross investment in lease 44,348 — — — 44,348 Fair value of financial instruments — — 113 — 113 494,919 138,390 115,665 (295,134 ) 453,840 Vessels 3,813,906 294,305 1,818,786 (723 ) 5,926,274 Gross investment in lease 817,631 — — — 817,631 Goodwill — 75,321 — — 75,321 Investment in subsidiaries 951,062 577,305 — (1,528,367 ) — Other assets 100,264 18,978 96,168 (10,479 ) 204,931 $ 6,177,782 $ 1,104,299 $ 2,030,619 $ (1,834,703 ) $ 7,477,997 Liabilities, puttable preferred shares and shareholders' equity Current liabilities: Accounts payable and accrued liabilities $ 29,443 $ 38,620 $ 2,148 $ — $ 70,211 Intercompany accounts payable 48,942 38,499 149,078 (236,519 ) — Loans from affiliate — — 36,527 (36,527 ) — Current portion of deferred revenue 51,191 20,985 4,724 (20,985 ) 55,915 Current portion of long-term debt 619,839 — 102,802 — 722,641 Current portion of long-term obligations under capital lease 32,050 16,334 — — 48,384 Current portion of other long-term liabilities 23,594 — 8,649 — 32,243 805,059 114,438 303,928 (294,031 ) 929,394 Deferred revenue 376,884 — — — 376,884 Long-term debt 1,732,110 — 1,032,790 — 2,764,900 Long-term obligations under capital lease 459,520 131,852 — — 591,372 Other long-term liabilities 169,934 15,530 6,433 (11,740 ) 180,157 Fair value of financial instruments 126,157 — 1,015 — 127,172 3,669,664 261,820 1,344,166 (305,771 ) 4,969,879 Puttable preferred shares 48,139 — — — 48,139 Shareholders’ equity: Share capital 2,102 436,669 526,532 (963,201 ) 2,102 Treasury shares (371 ) — — — (371 ) Additional paid in capital 3,126,457 233,739 116,127 (349,866 ) 3,126,457 Retained earnings (deficit) (645,638 ) 172,071 43,794 (215,865 ) (645,638 ) Accumulated other comprehensive loss (22,571 ) — — — (22,571 ) 2,459,979 842,479 686,453 (1,528,932 ) 2,459,979 $ 6,177,782 $ 1,104,299 $ 2,030,619 $ (1,834,703 ) $ 7,477,997 December 31, 2017 Parent Issuer Guarantors Non-Guarantors Eliminations Consolidated Assets Current assets: Cash and cash equivalents $ 146,328 $ 77,712 $ 29,136 $ — $ 253,176 Short-term investments — 104 — — 104 Accounts receivable 37,303 25,347 — (50,972 ) 11,678 Loans to affiliate 36,100 — — — 36,100 Prepaid expenses and other 29,037 30,348 938 (15,454 ) 44,869 Gross investment in lease 35,478 — — — 35,478 284,246 133,511 30,074 (66,426 ) 381,405 Vessels 3,918,672 286,342 332,202 — 4,537,216 Gross investment in lease 687,896 — — — 687,896 Goodwill — 75,321 — — 75,321 Intercompany accounts receivable (payable) (11,594 ) 11,189 405 — — Investment in subsidiaries 474,713 59,902 — (534,615 ) — Other assets 116,154 81,463 9,104 (10,417 ) 196,304 $ 5,470,087 $ 647,728 $ 371,785 $ (611,458 ) $ 5,878,142 Liabilities and shareholders' equity Current liabilities: Accounts payable and accrued liabilities $ 35,307 $ 75,125 $ 2,789 $ (50,001 ) $ 63,220 Current portion of deferred revenue 54,578 16,104 140 (15,455 ) 55,367 Current portion of long-term debt 239,858 — 17,942 — 257,800 Current portion of long-term obligations under capital lease 28,534 15,378 — — 43,912 Current portion of other long-term liabilities 23,635 — — — 23,635 381,912 106,607 20,871 (65,456 ) 443,934 Deferred revenue 327,641 1,040 — — 328,681 Long-term debt 2,001,504 — 191,329 — 2,192,833 Long-term obligations under capital lease 445,279 149,737 — — 595,016 Other long-term liabilities 195,459 15,273 — (11,346 ) 199,386 Fair value of financial instruments 168,860 — — — 168,860 3,520,655 272,657 212,200 (76,802 ) 3,928,710 Shareholders’ equity: Share capital 1,646 41,789 33,299 (75,088 ) 1,646 Treasury shares (377 ) — — — (377 ) Additional paid in capital 2,752,988 233,739 109,488 (343,227 ) 2,752,988 Retained earnings (deficit) (781,137 ) 99,543 16,798 (116,341 ) (781,137 ) Accumulated other comprehensive loss (23,688 ) — — — (23,688 ) 1,949,432 375,071 159,585 (534,656 ) 1,949,432 $ 5,470,087 $ 647,728 $ 371,785 $ (611,458 ) $ 5,878,142
Consolidated Statements of Operations	Year ended December 31, 2018 Parent Issuer Guarantors Non-Guarantors Eliminations Consolidated Revenue $ 876,894 $ 266,906 $ 234,660 $ (282,129 ) $ 1,096,331 Operating expenses: Ship operating 243,311 191,151 42,627 (257,819 ) 219,270 Depreciation and amortization 181,397 13,846 50,558 — 245,801 General and administrative 33,327 21,586 962 (24,310 ) 31,565 Operating leases 111,008 5,501 13,238 — 129,747 569,043 232,084 107,385 (282,129 ) 626,383 Operating earnings 307,851 34,822 127,275 — 469,948 Other expenses (income): Interest expense and amortization of deferred financing fees 149,696 8,514 54,200 (345 ) 212,065 Interest income (3,812 ) (429 ) (301 ) 345 (4,197 ) Acquisition related gain on contract settlement — (2,430 ) — — (2,430 ) Change in fair value of financial instruments (15,720 ) 91 139 — (15,490 ) Equity income on consolidated subsidiaries (102,650 ) (68,582 ) — 171,232 — Equity income on investment — (1,216 ) — — (1,216 ) Other expense (income) 1,539 797 82 — 2,418 29,053 (63,255 ) 54,120 171,232 191,150 Net earnings (loss) $ 278,798 $ 98,077 $ 73,155 $ (171,232 ) $ 278,798 Year ended December 31, 2017 Parent Issuer Guarantors Non-Guarantors Eliminations Consolidated Revenue $ 797,317 $ 237,056 $ 45,086 $ (248,135 ) $ 831,324 Operating expenses: Ship operating 211,966 180,349 10,864 (219,263 ) 183,916 Cost of services, supervision fees — 1,300 — — 1,300 Depreciation and amortization 173,464 13,317 13,157 — 199,938 General and administrative 52,742 16,115 106 (28,872 ) 40,091 Operating leases 98,175 5,046 12,323 — 115,544 Gain on disposals (1 ) (13,603 ) — — (13,604 ) Expenses related to customer bankruptcy 472 — 541 — 1,013 Vessel impairments — — — — — 536,818 202,524 36,991 (248,135 ) 528,198 Operating earnings 260,499 34,532 8,095 — 303,126 Other expenses (income): Interest expense and amortization of deferred financing fees 97,762 7,795 10,832 — 116,389 Interest income (4,146 ) (412 ) — — (4,558 ) Change in fair value of financial instruments 11,894 737 — — 12,631 Equity income on investment (29,013 ) (12,761 ) — 35,939 (5,835 ) Other expense 8,765 497 — — 9,262 85,262 (4,144 ) 10,832 35,939 127,889 Net earnings (loss) $ 175,237 $ 38,676 $ (2,737 ) $ (35,939 ) $ 175,237 Year ended December 31, 2016 Parent Issuer Guarantors Non-Guarantors Eliminations Consolidated Revenue $ 835,851 $ 250,606 $ 50,969 $ (259,521 ) $ 877,905 Operating expenses: Ship operating 229,439 185,750 9,967 (232,829 ) 192,327 Cost of services, supervision fees — 7,390 — — 7,390 Depreciation and amortization 188,816 14,172 13,110 — 216,098 General and administrative 42,507 16,189 114 (26,692 ) 32,118 Operating leases 74,175 4,780 6,955 — 85,910 Loss on disposals 31,876 — — — 31,876 Expenses related to customer bankruptcy 7,342 — 12,390 — 19,732 Vessel impairments 285,195 — — — 285,195 859,350 228,281 42,536 (259,521 ) 870,646 Operating earnings (loss) (23,499 ) 22,325 8,433 — 7,259 Other expenses (income): Interest expense and amortization of deferred financing fees 101,009 7,583 11,290 — 119,882 Interest income (8,273 ) (179 ) (3 ) — (8,455 ) Refinancing expenses 1,962 — — — 1,962 Change in fair value of financial instruments 28,616 502 — — 29,118 Equity income on investment (11,176 ) (5,500 ) — 16,488 (188 ) Other expense (income) 3,402 578 — (1 ) 3,979 115,540 2,984 11,287 16,487 146,298 Net earnings (loss) $ (139,039 ) $ 19,341 $ (2,854 ) $ (16,487 ) $ (139,039 )
Consolidated Statements of Comprehensive Income	Year ended December 31, 2018 Parent Issuer Guarantors Non-Guarantors Eliminations Consolidated Net earnings (loss) $ 278,798 $ 98,077 $ 73,155 $ (171,232 ) $ 278,798 Amounts reclassified to net earnings during the year relating to cash flow hedging instruments 1,117 — — — 1,117 Comprehensive income (loss) $ 279,915 $ 98,077 $ 73,155 $ (171,232 ) $ 279,915 Year ended December 31, 2017 Parent Issuer Guarantors Non-Guarantors Eliminations Consolidated Net earnings (loss) $ 175,237 $ 38,676 $ (2,737 ) $ (35,939 ) $ 175,237 Other comprehensive income: Amounts reclassified to net earnings during the year relating to cash low hedging instruments 2,859 — — — 2,859 Comprehensive income (loss) $ 178,096 $ 38,676 $ (2,737 ) $ (35,939 ) $ 178,096 Year ended December 31, 2016 Parent Issuer Guarantors Non-Guarantors Eliminations Consolidated Net earnings (loss) $ (139,039 ) $ 19,341 $ (2,854 ) $ (16,487 ) $ (139,039 ) Amounts reclassified to net earnings during the year relating to cash flow hedging instruments 4,373 — — — 4,373 Comprehensive income (loss) $ (134,666 ) $ 19,341 $ (2,854 ) $ (16,487 ) $ (134,666 )
Consolidated Statements of Cash Flows	Year ended December 31, 2018 Parent Issuer Guarantors Non-Guarantors Eliminations Consolidated Cash from (used in) operating activities $ 223,936 $ 19,832 $ 275,083 $ (35,000 ) $ 483,851 Financing activities: Common shares issued, net of issuance costs — — — — — Preferred shares issued, net of issuance costs 144,375 — — — 144,375 Draws on credit facilities 205,600 — 120,000 — 325,600 Repayment of credit facilities (242,220 ) — (227,442 ) — (469,662 ) 2025 Notes and 2018 Warrants issued 250,000 — — — 250,000 Senior unsecured notes repurchased, including Related expenses (17,529 ) — — — (17,529 ) Draws on long-term obligations under capital lease 46,964 — — — 46,964 Repayment on long-term obligations under capital lease (30,504 ) (17,636 ) — — (48,140 ) Preferred shares redeemed, including related expenses (143,430 ) — — — (143,430 ) Proceeds from exercise of 2018 Warrants 250,000 — — — 250,000 Financing fees (10,057 ) — (6,065 ) — (16,122 ) Intercompany dividends paid — (23,800 ) (12,300 ) 36,100 — Dividends on common shares (49,937 ) — — — (49,937 ) Dividends on preferred shares (65,765 ) — — — (65,765 ) Cash from (used in) financing activities 337,497 (41,436 ) (125,807 ) 36,100 206,354 Investing activities: Expenditures for vessels (157,268 ) (20,003 ) (141,469 ) — (318,740 ) Short-term investments — (1 ) (2,427 ) — (2,428 ) Other assets 891 (4,078 ) 1,770 — (1,417 ) Intercompany dividends received 1,100 — — (1,100 ) — Acquisition of GCI (333,581 ) — — — (333,581 ) Cash acquired from GCI — — 70,121 — 70,121 Cash used in investing activities (488,858 ) (24,082 ) (72,005 ) (1,100 ) (586,045 ) Increase (decrease) in cash and cash equivalents 72,575 (45,686 ) 77,271 — 104,160 Cash, cash equivalents and restricted cash, beginning of period 146,328 85,600 35,308 — 267,236 Cash, cash equivalents and restricted cash, end of period $ 218,903 $ 39,914 $ 112,579 $ — $ 371,396 Year ended December 31, 2017 Parent Issuer Guarantors Non-Guarantors Eliminations Consolidated Cash from (used in) operating activities $ 315,803 $ 10,891 $ (8,257 ) $ 4,782 $ 323,219 Financing activities: Common shares issued, net of issuance costs 118,966 — — — 118,966 Preferred shares issued, net of issuance costs 2,690 — — — 2,690 Repayment of credit facilities (430,271 ) — (24,734 ) — (455,005 ) Draws on long-term obligations under capital lease 176,254 — — — 176,254 Repayment on long-term obligations under capital lease (9,649 ) (16,549 ) — — (26,198 ) Senior unsecured notes issued 80,000 — — — 80,000 Senior unsecured notes repurchased, including related expenses (7,075 ) — — — (7,075 ) Proceeds from sale-leaseback of vessels 90,753 — — — 90,753 Financing fees (9,840 ) 832 784 (2 ) (8,226 ) Dividends on common shares (61,830 ) (4,950 ) — 4,950 (61,830 ) Dividends on preferred shares (64,416 ) — — — (64,416 ) Advances from related parties — 6,667 41,510 (48,177 ) — Cash from (used in) financing activities (114,418 ) (14,000 ) 17,560 (43,229 ) (154,087 ) Investing activities: Expenditures for vessels (329,328 ) (7,076 ) (2,114 ) — (338,518 ) Short-term investments — 307 — — 307 Net proceeds from vessel disposals — 37,091 — — 37,091 Other assets 2,782 (5,365 ) (7 ) 206 (2,384 ) Loans to affiliate 27,376 (2,778 ) — (4,950 ) 19,648 Capital contribution in subsidiary (43,188 ) (3 ) — 43,191 — Cash used in investing activities (342,358 ) 22,176 (2,121 ) 38,447 (283,856 ) Increase (decrease) in cash and cash equivalents (140,973 ) 19,067 7,182 — (114,724 ) Cash, cash equivalents and restricted cash, beginning of period 287,301 66,533 28,126 — 381,960 Cash, cash equivalents and restricted cash, end of period $ 146,328 $ 85,600 $ 35,308 $ — $ 267,236 Year ended December 31, 2016 Parent Issuer Guarantors Non-Guarantors Eliminations Consolidated Cash from (used in) operating activities $ 268,780 $ 45,017 $ 33,711 $ (36,421 ) $ 311,087 Financing activities: Common shares issued, net of issuance costs 95,978 — — — 95,978 Preferred shares issued, net of issuance costs 541,694 — — — 541,694 Draws on credit facilities 220,485 — — — 220,485 Repayment of credit facilities (673,128 ) — (31,162 ) (1 ) (704,291 ) Draws on long-term obligations under capital lease 180,750 — — — 180,750 Repayment on long-term obligations under capital lease (9,182 ) (15,550 ) — (1 ) (24,733 ) Proceeds from sale-leaseback of vessels 354,000 — — — 354,000 Common shares repurchased, including related expenses (8,269 ) — — — (8,269 ) Preferred shares repurchased, including related expenses (333,074 ) — — — (333,074 ) Financing fees (14,912 ) 975 945 — (12,992 ) Dividends on common shares (148,555 ) (23,100 ) (19,366 ) 42,465 (148,556 ) Dividends on preferred shares (54,085 ) — — — (54,085 ) Cash from (used in) financing activities 151,702 (37,675 ) (49,583 ) 42,463 106,907 Investing activities: Expenditures for vessels (324,962 ) (17,891 ) (699 ) — (343,552 ) Short-term investments 7 2,997 — — 3,004 Net proceeds from vessel disposals 12,078 — — — 12,078 Proceeds from sale of leased vessels 20,000 — — — 20,000 Other assets 3,678 (4,896 ) 583 (6,042 ) (6,677 ) Loans to affiliate 49,735 — — — 49,735 Advances to related parties (30,466 ) (12,000 ) — 42,466 — Dividend recevied from subsidary 30,466 12,000 — (42,466 ) — Cash used in investing activities (239,464 ) (19,790 ) (116 ) (6,042 ) (265,412 ) Increase (decrease) in cash and cash equivalents 181,018 (12,448 ) (15,988 ) — 152,582 Cash, cash equivalents and restricted cash, beginning of period 106,283 78,981 44,114 — 229,378 Cash, cash equivalents and restricted cash, end of period $ 287,301 $ 66,533 $ 28,126 $ — $ 381,960

General - Additional Informatio

General - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Company incorporation date	May 3, 2005

Significant accounting polici_3

Significant accounting policies - Additional Information (Detail) - USD ($)	Jan. 15, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Summary Of Significant Accounting Policies [Line Items]
Working capital deficiency		$ 475,554,000
Aggregate proceeds from issuance of debt and warrant		250,000,000	$ 0	$ 0
ASU 2016-02
Summary Of Significant Accounting Policies [Line Items]
Deferred gain related to the sale-leaseback transactions		200,000,000
ASU 2016-02 | Sale-leaseback Transactions [Member]
Summary Of Significant Accounting Policies [Line Items]
Operating lease, right-of-use asset		1,100,000,000
ASU 2016-02 | Office Lease [Member]
Summary Of Significant Accounting Policies [Line Items]
Operating lease, lease liability		$ 1,100,000,000
Vessels [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life		30 years
Number of years between dry-docking		5 years
Senior Unsecured Notes [Member]
Summary Of Significant Accounting Policies [Line Items]
Working capital deficiency		$ 320,396,000
Long-term debt, month and year of maturity		2019-04
Subsequent Events [Member] | 2026 Notes [Member]
Summary Of Significant Accounting Policies [Line Items]
Face value of debt	$ 250,000,000
Subsequent Events [Member] | 2019 Warrants [Member]
Summary Of Significant Accounting Policies [Line Items]
Warrants outstanding	38,461,539
Subsequent Events [Member] | 2019 Warrants [Member] | 2026 Notes [Member]
Summary Of Significant Accounting Policies [Line Items]
Aggregate proceeds from issuance of debt and warrant	$ 500,000,000
Subsequent Events [Member] | 2019 Warrants [Member] | Class A Common Shares [Member]
Summary Of Significant Accounting Policies [Line Items]
Warrants outstanding	38,461,539
Warrants exercise price	$ 6.50

Acquisition of GCI - Additional

Acquisition of GCI - Additional Information (Detail)	Mar. 13, 2018USD ($)VesselContainership$ / sharesshares	Dec. 31, 2018shares	Dec. 31, 2017shares
Business Acquisition [Line Items]
Shares issued | shares		1,986,449	0
Series D Preferred Shares [Member]
Business Acquisition [Line Items]
Shares issued | shares	1,986,449	1,986,449
GCI [Member]
Business Acquisition [Line Items]
Percentage of interest in acquired entity	89.20%
Aggregate purchase price | $	$ 498,050,000
Escrow deposit | $	10,000,000
Acquisition-related costs | $	$ 1,910,000
Identifiable contracts, estimated useful life	5 years 3 months 18 days
GCI [Member] | Series D Preferred Shares [Member]
Business Acquisition [Line Items]
Shares issued | shares	1,986,449
Right to repurchase of temporary equity shares, commencing date	Sep. 13, 2019
Right to repurchase of temporary equity shares, ending date	Oct. 13, 2019
Price per share at that time of repurchase | $ / shares	$ 24.84
GCI [Member] | 10000 TEU and 14000 TEU Newbuilding Vessels [Member]
Business Acquisition [Line Items]
Number of vessels acquired | Vessel	2
Number of containerships acquired | Containership	18

Acquisition of GCI - Schedule o

Acquisition of GCI - Schedule of Aggregate Purchase Price (Detail) - USD ($)	Mar. 13, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Cash		$ 333,581,000	$ 0	$ 0
GCI [Member]
Business Acquisition [Line Items]
Cash	$ 331,904,000
Settlement of intercompany balances	41,279,000
Carrying value of previously held equity interest	61,891,000
Transaction fees	1,910,000
Aggregate purchase price	498,050,000
GCI [Member] | Series D Preferred Shares [Member]
Business Acquisition [Line Items]
Shares value	47,158,000
GCI [Member] | Class A Common Shares [Member]
Business Acquisition [Line Items]
Shares value	$ 13,908,000

Acquisition of GCI - Schedule_2

Acquisition of GCI - Schedule of Aggregate Purchase Price (Parenthetical) (Detail) - shares	Mar. 13, 2018	Dec. 31, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Shares issued		1,986,449	0
Series D Preferred Shares [Member]
Business Acquisition [Line Items]
Shares issued	1,986,449	1,986,449
Class A Common Shares [Member]
Business Acquisition [Line Items]
Shares issued	2,514,996

Acquisition of GCI - Summary of

Acquisition of GCI - Summary of Value of Attributed to Identifiable Assets Acquired and Liabilities Assumed (Detail) - GCI [Member] $ in Thousands	Mar. 13, 2018USD ($)
Business Acquisition [Line Items]
Cash and cash equivalents	$ 70,121
Current assets	5,316
Vessels	1,369,628
Vessels under construction	28,924
Other assets	107,407
Total assets acquired	1,581,396
Debt assumed	1,038,081
Current liabilities	31,115
Other long-term liabilities	14,150
Net assets acquired	$ 498,050

Related party transactions - Ad

Related party transactions - Additional Information (Detail)	Jul. 16, 2018$ / sharesshares	May 31, 2018USD ($)	Mar. 13, 2018USD ($)$ / sharesshares	Feb. 14, 2018USD ($)Directorshares	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)shares	Dec. 31, 2016USD ($)	Mar. 31, 2018shares	Mar. 12, 2018
Related Party Transaction [Line Items]
Loans to affiliates					$ 0	$ 36,100,000
Amounts payable to related parties included in accounts payable and accrued liabilities					0	1,386,000
Gross proceeds from exercise of warrants					$ 250,000,000	0	$ 0
Class A Common Shares [Member] | Director [Member]
Related Party Transaction [Line Items]
Termination fee paid						$ 6,250,000
Termination fee paid, shares | shares						945,537
GCI [Member]
Related Party Transaction [Line Items]
Percentage of equity method investment									10.80%
Percentage of interest in acquired entity			89.20%
Amounts payable to related parties included in accounts payable and accrued liabilities						$ 1,385,500
GCI [Member] | Vessels [Member]
Related Party Transaction [Line Items]
Loans to affiliates						36,100,000
GCI [Member] | Vessels [Member] | Minimum [Member]
Related Party Transaction [Line Items]
Receivable interest rate per annum					5.00%
GCI [Member] | Vessels [Member] | Maximum [Member]
Related Party Transaction [Line Items]
Receivable interest rate per annum					6.00%
Other Related Parties [Member]
Related Party Transaction [Line Items]
Amounts due from related other parties included in accounts receivable					$ 255,000	$ 318,500
Fairfax Financial Holdings Limited [Member]
Related Party Transaction [Line Items]
Warrants outstanding | shares				38,461,539
Gross proceeds from exercise of warrants		$ 500,000,000
Fairfax Financial Holdings Limited [Member] | Class A Common Shares [Member]
Related Party Transaction [Line Items]
Warrants outstanding | shares	25,000,000
Warrants outstanding exercise price | $ / shares	$ 8.05
Warrants outstanding term	7 years
Fairfax Financial Holdings Limited [Member] | 2019 Warrants [Member] | Class A Common Shares [Member]
Related Party Transaction [Line Items]
Warrants outstanding | shares								38,461,539
Warrants outstanding exercise price | $ / shares			$ 6.50
Warrants outstanding exercised | shares			38,461,539
Fairfax Financial Holdings Limited [Member] | Senior Notes Due 2025 [Member]
Related Party Transaction [Line Items]
Face value of debt				$ 250,000,000
Interest bearing of aggregate principal amount				5.50%
Number of director rights to designated by investors | Director				2
Fairfax Financial Holdings Limited [Member] | Senior Notes Due 2026 [Member]
Related Party Transaction [Line Items]
Face value of debt			$ 250,000,000
Interest bearing of aggregate principal amount			5.50%

Related party transactions - Sc

Related party transactions - Schedule of Income or Expenses with Related Parties (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Arrangement Fees [Member]
Related Party Transaction [Line Items]
Expenses incurred with related parties	$ 0	$ 1,827	$ 7,598
Transaction Fees [Member]
Related Party Transaction [Line Items]
Expenses incurred with related parties	0	2,262	6,317
Management Fees [Member]
Related Party Transaction [Line Items]
Income earned from related parties	914	4,447	4,266
Supervision Fees [Member]
Related Party Transaction [Line Items]
Income earned from related parties	0	1,300	7,800
Interest Expense [Member]
Related Party Transaction [Line Items]
Expenses incurred with related parties	19,380	0	0
Interest Income [Member]
Related Party Transaction [Line Items]
Income earned from related parties	$ 427	$ 2,677	$ 7,513

Gross investment in lease - Sch

Gross investment in lease - Schedule of Gross Investment in Lease (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Leases [Abstract]
Gross investment in lease	$ 861,979	$ 723,374
Current portion	(44,348)	(35,478)
Gross investment in lease, non-current portion	$ 817,631	$ 687,896

Gross investment in lease - Add

Gross investment in lease - Additional Information (Detail)	1 Months Ended			6 Months Ended	12 Months Ended
	Jan. 31, 2018Vessel	Jun. 30, 2016Vessel	Apr. 30, 2015VesselTEU	Jun. 30, 2018USD ($)	Dec. 31, 2017Vessel
Leases [Line Items]
Number of vessels			5
Capacity in TEUs | TEU			11,000
Term of agreement			17 years
TEU Vessels [Member]
Leases [Line Items]
Number of vessels delivered	1				4
MSC [Member]
Leases [Line Items]
Purchase price per vessel | $				$ 32,000,000
GCI [Member]
Leases [Line Items]
Number of vessels and associated bareboat charter contracts acquired		2

Vessels - Schedule of Vessels (

Vessels - Schedule of Vessels (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Property Plant And Equipment [Line Items]
Cost	$ 8,004,011	$ 6,262,453
Accumulated depreciation	2,077,737	1,725,237
Net book value	$ 5,926,274	4,537,216
Vessels [Member]
Property Plant And Equipment [Line Items]
Cost		6,116,091
Accumulated depreciation		1,725,237
Net book value		4,390,854
Vessels under construction [Member]
Property Plant And Equipment [Line Items]
Cost		146,362
Accumulated depreciation		0
Net book value		$ 146,362

Vessels - Additional Informatio

Vessels - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)Vessel	Dec. 31, 2016USD ($)Vessel
Property Plant And Equipment [Line Items]
Net sale proceeds from vessel disposals	$ 0	$ 37,091,000	$ 12,078,000
Gain (Loss) on disposition	0	13,604,000	(31,876,000)
Vessel impairments	0	0	$ 285,195,000
Number of vessels held for use | Vessel			16
Vessels under construction [Member]
Property Plant And Equipment [Line Items]
Interest costs capitalized to vessels under construction	$ 769,000	9,757,000
Seaspan Alps, Seaspan Kenya, Seaspan Mourne and Seaspan Grouse [Member]
Property Plant And Equipment [Line Items]
Net sale proceeds from vessel disposals		37,100,000
Gain (Loss) on disposition		$ 13,604,000
4250 TEU Vessels [Member]
Property Plant And Equipment [Line Items]
Number of vessels sold | Vessel		4
Number of vessels held for use | Vessel			4
Seaspan Excellence and Seaspan Efficiency [Member]
Property Plant And Equipment [Line Items]
Net sale proceeds from vessel disposals			$ 12,078,000
Gain (Loss) on disposition			$ (31,876,000)
4600 TEU Vessels [Member]
Property Plant And Equipment [Line Items]
Number of vessels sold | Vessel			2
3500 TEU Vessels [Member]
Property Plant And Equipment [Line Items]
Number of vessels held for use | Vessel			2
2500 TEU Vessels [Member]
Property Plant And Equipment [Line Items]
Number of vessels held for use | Vessel			10

Other assets - Schedule of Othe

Other assets - Schedule of Other Assets (Detail) - USD ($) $ in Thousands		Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Other Assets [Abstract]
Equity investment in affiliate	[1]			$ 60,683
Intangible assets	[2]	$ 111,968		27,486
Deferred dry-dock		36,660	[3]	42,536	[3]	$ 49,037
Deferred financing fees		17,286	[3]	19,484	[3]	$ 19,062
Restricted cash	[4]	14,069		14,060
Capital assets		600		3,268
Other		24,348		28,787
Other assets		$ 204,931		$ 196,304
[1]	Equity investment in affiliate In March 2011, the Company entered into an agreement to participate in GCI, an investment vehicle established by an affiliate of The Carlyle Group. The Company accounted for its 10.8% investment in GCI using the equity method. As at December 31, 2017, the equity investment of $60,683,000 was comprised of the Company’s capital contribution of $51,406,000 and its cumulative equity income on investment of $9,277,000. On March 13, 2018, the Company acquired the remaining 89.2% (note 3).
[2]	Intangible assets Intangible assets primarily comprises of the fair value of time charter contracts acquired. In connection with the acquisition of GCI on March 13, 2018 (note 3), the Company recognized $100,750,000 for the fair value of time charter contracts. During the year ended December 31, 2018, the Company recorded $16,269,000 of amortization expense related to all acquired contracts. The future amortization expense related to the fair value of all time charter contracts acquired is approximated as follows: 2019 $19,739 2020 19,223 2021 17,658 2022 16,090 2023 12,390 Thereafter 25,199 $110,299
[3]	Deferred charges During the years ended December 31, 2018 and 2017, changes in deferred charges were as follows: Dry-docking Financing fees December 31, 2016 $49,037 $19,062 Costs incurred 8,708 2,554 Amortization expensed (1) (15,209) (2,132) December 31, 2017 $42,536 $19,484 Costs incurred 10,756 27 Amortization expensed (1) (16,632) (2,225) December 31, 2018 $36,660 $17,286 _____________ (1)Amortization of dry-docking costs is included in depreciation and amortization. Amortization of financing fees is included in interest expense and amortization of deferred financing fees, unless it qualifies for capitalization.
[4]	Restricted cash Restricted cash represents amounts required to be set aside by contractual agreement for two of the Company’s capital leases. The restriction will be removed upon termination of the charter agreements.

Other assets - Schedule of Ot_2

Other assets - Schedule of Other Assets (Parenthetical) (Detail) $ in Thousands		12 Months Ended
		Dec. 31, 2018USD ($)Lease		Dec. 31, 2017USD ($)	Mar. 13, 2018
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Line Items]
Capital contribution				$ 60,683,000
Amount of equity income on investment				9,277,000
Beginning Balance, Dry-docking		$ 42,536	[1]	49,037
Costs incurred, Dry-docking		10,756		8,708
Amortization expensed, Dry-docking		(16,632)		(15,209)
Ending Balance, Dry-docking	[1]	36,660		42,536
Beginning Balance, Financing fees		19,484	[1]	19,062
Costs incurred, Financing fees		27		2,554
Amortization expensed, Financing fees		(2,225)		(2,132)
Ending Balance, Financing fees	[1]	$ 17,286		$ 19,484
Number of capital leases | Lease		2
Acquired contracts [Member]
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Line Items]
2019		$ 19,739
2020		19,223
2021		17,658
2022		16,090
2023		12,390
Thereafter		25,199
Finite-lived intangible assets, net		110,299
GCI [Member]
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Line Items]
Percentage of investment in vehicle on equity method				10.80%
Amount of investment comprised of capital contribution				$ 51,406,000
Percentage of interest in acquired entity					89.20%
GCI [Member] | Time charter contracts [Member] | Acquired contracts [Member]
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Line Items]
Fair value of contracts		100,750,000
Amortization expense		$ 16,269,000
[1]	Deferred charges During the years ended December 31, 2018 and 2017, changes in deferred charges were as follows: Dry-docking Financing fees December 31, 2016 $49,037 $19,062 Costs incurred 8,708 2,554 Amortization expensed (1) (15,209) (2,132) December 31, 2017 $42,536 $19,484 Costs incurred 10,756 27 Amortization expensed (1) (16,632) (2,225) December 31, 2018 $36,660 $17,286 _____________ (1)Amortization of dry-docking costs is included in depreciation and amortization. Amortization of financing fees is included in interest expense and amortization of deferred financing fees, unless it qualifies for capitalization.

Deferred revenue - Deferred Rev

Deferred revenue - Deferred Revenue (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Deferred Revenue Disclosure [Abstract]
Deferred revenue on time charters	$ 22,318	$ 26,907
Deferred interest on lease receivable	410,481	355,451
Other deferred revenue	0	1,690
Deferred revenue	432,799	384,048
Current portion of deferred revenue	(55,915)	(55,367)
Deferred revenue	$ 376,884	$ 328,681

Long-term Debt - Schedule of Lo

Long-term Debt - Schedule of Long-Term Debt (Detail) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Long-term debt:
Long-term debt, gross	$ 3,597,337,000	$ 2,468,062,000
Deferred financing fees	(24,065,000)	(17,429,000)
Long-term debt	3,487,541,000	2,450,633,000
Current portion of long-term debt	(722,641,000)	(257,800,000)
Long-term debt Non Current	2,764,900,000	2,192,833,000
Revolving Credit Facilities [Member]
Long-term debt:
Long-term debt, gross	788,198,000	854,121,000
Long-term debt	788,198,000
Term Loan Credit Facilities [Member]
Long-term debt:
Long-term debt, gross	2,158,743,000	1,196,016,000
Fair value adjustment on term loan credit facilities	(2,339,000)	0
Long-term debt	2,158,743,000
Senior Unsecured Notes [Member]
Long-term debt:
Long-term debt, gross	400,396,000	417,925,000
Long-term debt	400,396,000	417,925,000
2025 Notes [Member]
Long-term debt:
Long-term debt, gross	250,000,000	0
Debt discount on 2025 Notes	$ (83,392,000)	$ 0

Long-term Debt - Schedule of _2

Long-term Debt - Schedule of Long-Term Debt (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2018
2025 Notes [Member]
Debt Instrument [Line Items]
Debt instrument maturity year	2025

Long-term Debt - Additional Inf

Long-term Debt - Additional Information (Detail)

Jan. 16, 2019Vessel

Mar. 13, 2018USD ($)VesselCreditFacility

Oct. 10, 2017USD ($)Note$ / Note

Nov. 30, 2018USD ($)

Sep. 30, 2018USD ($)

Aug. 31, 2018USD ($)

Apr. 30, 2018USD ($)Vessel

Mar. 31, 2018USD ($)Vessel$ / sharesshares

Feb. 28, 2018USD ($)shares

Dec. 31, 2018USD ($)VesselCreditFacility

Dec. 31, 2017USD ($)

Dec. 31, 2016USD ($)

Dec. 31, 2014USD ($)Note$ / Note

Jan. 31, 2019USD ($)

Jan. 15, 2019shares

Jul. 16, 2018shares

Feb. 14, 2018shares

Debt Instrument [Line Items]

Maturity date

Dec. 31, 2022

Number of vessels for which waiver obtained | Vessel

2

Period of vessel unemployment resulting in waiver termination

90 days

Early repayment of debt

$ 10,000,000

Senior unsecured notes issued

$ 0

$ 80,000,000

$ 0

Fairfax Financial Holdings Limited [Member]

Debt Instrument [Line Items]

Warrants outstanding | shares

38,461,539

2019 Warrants [Member] | Subsequent Events [Member]

Debt Instrument [Line Items]

Warrants outstanding | shares

38,461,539

Class A Common Shares [Member] | Fairfax Financial Holdings Limited [Member]

Debt Instrument [Line Items]

Warrants outstanding | shares

25,000,000

Class A Common Shares [Member] | 2018 Warrants [Member] | Fairfax Financial Holdings Limited [Member]

Debt Instrument [Line Items]

Warrants outstanding | shares

38,461,539

Warrants outstanding purchase price

$ 250,000,000

Class A Common Shares [Member] | 2019 Warrants [Member] | Subsequent Events [Member]

Debt Instrument [Line Items]

Warrants outstanding | shares

38,461,539

Class A Common Shares [Member] | 2019 Warrants [Member] | Fairfax Financial Holdings Limited [Member]

Debt Instrument [Line Items]

Warrants outstanding | shares

38,461,539

Warrants exercise price | $ / shares

$ 6.50

Class A Common Shares [Member] | 2019 Warrants [Member] | Fairfax Financial Holdings Limited [Member] | Subsequent Events [Member]

Debt Instrument [Line Items]

Warrants outstanding purchase price

$ 250,000,000

Unsecured Term Loan [Member]

Debt Instrument [Line Items]

Prepayment of remaining balance of unsecured term loan

29,000,000

Senior Unsecured Notes Due 2019 [Member]

Debt Instrument [Line Items]

Maturity date

Apr. 30, 2019

Number of notes issued | Note

13,800,000

Debt instrument price per note | $ / Note

25

Senior unsecured notes issued

$ 345,000,000

Debt instrument, interest rate

6.375%

Repurchase of senior unsecured notes

$ 17,529,000

Senior Unsecured Notes Due 2027 [Member]

Debt Instrument [Line Items]

Maturity date

Oct. 30, 2027

Number of notes issued | Note

3,200,000

Debt instrument price per note | $ / Note

25

Senior unsecured notes issued

$ 80,000,000

Debt instrument, interest rate

7.125%

2025 Notes [Member] | Fairfax Financial Holdings Limited [Member]

Debt Instrument [Line Items]

Principal outstanding amount

$ 250,000,000

Interest bearing of aggregate principal amount

5.50%

2026 Notes [Member] | Fairfax Financial Holdings Limited [Member]

Debt Instrument [Line Items]

Principal outstanding amount

$ 250,000,000

Interest bearing of aggregate principal amount

5.50%

GCI [Member]

Debt Instrument [Line Items]

Number of vessels for which waiver obtained | Vessel

4

Number of vessels secured by first-priority mortgages | Vessel

70

Number of vessels in process of being released from security | Vessel

6

Term Loans [Member]

Debt Instrument [Line Items]

Credit facilities, maximum aggregate borrowings

$ 2,158,743,000

1,301,616,000

Credit facilities, aggregate borrowings undrawn

$ 105,600,000

Credit facility maturity start month and year

2020-09

Credit facility maturity end month and year

2030-01

Weighted average rate of interest, including the margin

4.80%

3.60%

Term Loan Line Of Credit Facility Description

Term Loan payments are made in quarterly or semi-annual payments commencing three, six or thirty-six months after delivery of the associated newbuilding containership or utilization date.

Term Loans [Member] | Export-Import Bank Of Korea [Member]

Debt Instrument [Line Items]

Interest rate margin

0.70%

0.70%

Principal outstanding amount

$ 65,515,000

$ 78,288,000

Term Loans [Member] | GCI [Member]

Debt Instrument [Line Items]

Fair value, long-term debt

$ 1,038,081,000

Number of term loan credit facilities | CreditFacility

12

Number of operating vessels | Vessel

16

Secured Term Loans [Member]

Debt Instrument [Line Items]

Credit facilities, maximum aggregate borrowings

$ 120,000,000

$ 100,000,000

Number of vessels secured | Vessel

11

Repayment of principal balance of secured term loan

$ 36,484,000

$ 100,900,000

$ 29,200,000

Number of vessels unencumbered | Vessel

4

Number of vessels under security unencumbered | Vessel

2

Number of vessels in process of becoming unencumbered | Vessel

6

Secured Term Loans [Member] | 10000 TEU Vessels [Member]

Debt Instrument [Line Items]

Number of vessels acquired | Vessel

2

Minimum [Member] | 2025 Notes [Member] | Fairfax Financial Holdings Limited [Member]

Debt Instrument [Line Items]

Notice period required for early redemption of notes

120 days

Minimum [Member] | 2026 Notes [Member] | Fairfax Financial Holdings Limited [Member]

Debt Instrument [Line Items]

Notice period required for early redemption of notes

120 days

Maximum [Member] | 2025 Notes [Member] | Fairfax Financial Holdings Limited [Member]

Debt Instrument [Line Items]

Notice period required for early redemption of notes

150 days

Maximum [Member] | 2026 Notes [Member] | Fairfax Financial Holdings Limited [Member]

Debt Instrument [Line Items]

Notice period required for early redemption of notes

150 days

One Month LIBOR [Member] | Term Loans [Member]

Debt Instrument [Line Items]

LIBOR interest rate

2.40%

1.60%

LIBOR Plus Margin [Member] | Term Loans [Member]

Debt Instrument [Line Items]

Interest rate description

interest calculated as one month, three month or six month LIBOR plus a margin per annum

Debt instrument description

At December 31, 2018, the one month, three month and six month average LIBOR was 2.4%, 2.6% and 2.5%, respectively (2017 – 1.6%, 1.5% and 1.5%, respectively) and the margins ranged between 0.4% and 4.8% (2017 – 0.4% and 4.8%) for Term Loans.

Principal outstanding amount

$ 2,093,228,000

LIBOR Plus Margin [Member] | Minimum [Member] | Term Loans [Member]

Debt Instrument [Line Items]

Interest rate margin

0.40%

0.40%

LIBOR Plus Margin [Member] | Maximum [Member] | Term Loans [Member]

Debt Instrument [Line Items]

Interest rate margin

4.80%

4.80%

Three Month LIBOR [Member] | Term Loans [Member]

Debt Instrument [Line Items]

LIBOR interest rate

2.60%

1.50%

Six Month LIBOR [Member] | Term Loans [Member]

Debt Instrument [Line Items]

LIBOR interest rate

2.50%

1.50%

Revolving Credit Facilities [Member]

Debt Instrument [Line Items]

Number of long-term revolving credit facilities | CreditFacility

4

Credit facilities, maximum aggregate borrowings

$ 150,000,000

$ 938,209,000

$ 974,132,000

Credit facilities, aggregate borrowings undrawn

150,011,000

$ 120,000,000

Debt instrument term

2 years

Credit facilities, amounts drawn

$ 0

Credit facility maturity start month and year

2019-08

Credit facility maturity end month and year

2023-12

Interest rate description

Interest is calculated as one month LIBOR plus a margin per annum

Debt instrument description

At December 31, 2018, the one month average LIBOR was 2.4% (2017 – 1.5%) and the margins ranged between 0.5% and 1.4% (2017 – 0.5% and 1.4%) for revolving credit facilities

Weighted average rate of interest, including the margin

3.00%

2.20%

Description of the terms of a credit facility arrangement

For secured facilities, revolver loan payments are made in semi-annual payments commencing six or thirty-six months after delivery of the associated newbuilding containership

Maturity date

Dec. 31, 2023

Revolving Credit Facilities [Member] | Subsequent Events [Member]

Debt Instrument [Line Items]

Number of vessels in process of becoming unencumbered | Vessel

8

Revolving Credit Facilities [Member] | Term Loan Payment Due in Full Maturity [Member]

Debt Instrument [Line Items]

Principal outstanding amount

$ 58,240,000

Revolving Credit Facilities [Member] | Minimum [Member]

Debt Instrument [Line Items]

Interest rate margin

0.50%

0.50%

Commitment fee on undrawn amount

0.20%

0.20%

Revolving Credit Facilities [Member] | Maximum [Member]

Debt Instrument [Line Items]

Interest rate margin

1.40%

1.40%

Commitment fee on undrawn amount

0.50%

0.40%

Revolving Credit Facilities [Member] | One Month LIBOR [Member]

Debt Instrument [Line Items]

LIBOR interest rate

2.40%

1.50%

Three Hundred and Sixty Four Day Revolving Credit Facility [Member]

Debt Instrument [Line Items]

Line of credit facility cancelled

$ 120,000,000

Long-term Debt - Schedule of Fu

Long-term Debt - Schedule of Future Minimum Repayments of Revolving Credit Facilities and Term Loans (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Long-term debt	$ 3,487,541	$ 2,450,633
Term Loans [Member]
Debt Instrument [Line Items]
2019	207,194
2020	265,270
2021	412,091
2022	277,719
2023	517,640
Thereafter	478,829
Long-term debt	2,158,743
Revolving Credit Facilities [Member]
Debt Instrument [Line Items]
2019	197,320
2020	53,281
2021	56,416
2022	422,941
2023	58,240
Long-term debt	$ 788,198

Long-term Obligations under C_3

Long-term Obligations under Capital Lease - Schedule of Long-term Obligations Under Capital Lease (Detail) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Capital Lease Obligations [Abstract]
Long-term obligations under capital lease	$ 647,664,000	$ 648,840,000
Deferred financing fees	(7,908,000)	(9,912,000)
Long-term obligations under capital lease	639,756,000	638,928,000
Current portion of long-term obligations under capital lease	(48,384,000)	(43,912,000)
Long-term obligations under capital lease	$ 591,372,000	$ 595,016,000

Long-term Obligations under C_4

Long-term Obligations under Capital Lease - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2018USD ($)Vessel	Dec. 31, 2017USD ($)Vessel
Sale Leaseback Transaction [Line Items]
Number of vessels under construction | Vessel		1
COSCO Pride - 13100 TEU vessel [Member]
Sale Leaseback Transaction [Line Items]
Financing from lessor	$ 144,185,000
Terms of leases	12 years
Lease payments include an interest component based on three month LIBOR plus margin percentage	2.60%
Carrying value of vessels being funded	$ 136,311,000
COSCO Pride - 13100 TEU vessel [Member] | Maximum [Member]
Sale Leaseback Transaction [Line Items]
Outstanding balance at end of lease term	48,000,000
COSCO Faith - 13100 TEU vessel [Member]
Sale Leaseback Transaction [Line Items]
Financing from lessor	$ 109,000,000
Terms of leases	12 years
Lease payments include an interest component based on three month LIBOR plus margin percentage	3.00%
Carrying value of vessels being funded	$ 139,407,000
Amount of option to purchase the vessel from the lessor	$ 1
Weighted average rate of interest, including the margin	5.64%	4.80%
Leases for three 4500 TEU vessels [Member]
Sale Leaseback Transaction [Line Items]
Terms of leases	5 years
Carrying value of vessels being funded	$ 215,080,000
Refinancing from lessor	150,000,000
Leases for Five 4500 TEU vessels [Member]
Sale Leaseback Transaction [Line Items]
Carrying value of vessels being funded	$ 490,798,000	$ 602,695,000
Number of vessels | Vessel	5	5
11000 TEU Newbuilding Vessels [Member]
Sale Leaseback Transaction [Line Items]
Financing from lessor	$ 420,750,000
Terms of leases	17 years
Lease payments include an interest component based on three month LIBOR plus margin percentage	3.30%
Lease financing, number of vessels | Vessel	5
Commitment fee on undrawn amount	0.80%

Long-term Obligations under C_5

Long-term Obligations under Capital Lease - Repayments Due for Obligations Under Capital Lease (Detail) $ in Thousands	Dec. 31, 2018USD ($)
Capital Lease Obligations [Abstract]
2019	$ 59,086
2020	150,401
2021	46,352
2022	46,808
2023	88,552
Thereafter	281,370
Capital Leases, Future Minimum Payments Due, Total	672,569
Less amounts representing interest	(24,905)
Capital Lease Obligation	$ 647,664

Other long-term liabilities - S

Other long-term liabilities - Schedule of Other Long-Term Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Other Long Term Liabilities [Abstract]
Deferred gain on sale-leasebacks	$ 181,053	$ 203,737
Other	31,347	19,284
Other long-term liabilities	212,400	223,021
Current portion of other long-term liabilities	(32,243)	(23,635)
Other long-term liabilities	$ 180,157	$ 199,386

Other Long-term Liabilities - A

Other Long-term Liabilities - Additional Information (Detail)	1 Months Ended	12 Months Ended
	May 31, 2017USD ($)Vessel	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)
Other Long Term Liabilities [Line Items]
Total gross proceeds from sale-leaseback transaction		$ 0	$ 90,753,000	$ 354,000,000
Deferred gain on sale-leasebacks		$ 181,053,000	$ 203,737,000
One 14000 TEU Vessel [Member]
Other Long Term Liabilities [Line Items]
Number of vessels under sales leaseback | Vessel	1
YM Wind [Member]
Other Long Term Liabilities [Line Items]
Total gross proceeds from sale-leaseback transaction	$ 144,000,000
Sale leaseback transaction term description		Under the transaction, the Company sold the vessel to the SPCs and leased the vessel back from the SPCs over a term of 12 years, with an option to purchase the vessel at the 9.5 year anniversary for a pre-determined fair value purchase price.
Lease financing lease period	12 years
Anniversary date at which option to purchase vessel is available	9 years 6 months
Deferred gain on sale-leasebacks	$ 31,611,000

Puttable Preferred Shares and_3

Puttable Preferred Shares and Share Capital - Additional Information (Detail) - USD ($)	Mar. 13, 2018	Sep. 30, 2017	Sep. 30, 2018	Mar. 31, 2018	Nov. 30, 2017	Jun. 30, 2017	Nov. 30, 2016	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jul. 16, 2018	Apr. 30, 2018
Class Of Stock [Line Items]
Dividend reinvestment program discount rate percentage									3.00%
Proceeds from issuance of common shares, gross									$ 0	$ 118,966,000	$ 95,978,000
Preferred shares, issued								32,872,706	33,272,706	32,872,706
Proceeds from issuance of preferred shares, gross									$ 144,375,000	$ 2,690,000	$ 541,694,000
Puttable preferred shares, par value								$ 0.01	$ 0.01	$ 0.01
Class A Common Shares [Member]
Class Of Stock [Line Items]
Common shares, authorized				200,000,000				200,000,000	400,000,000	200,000,000			400,000,000
Common shares, outstanding								131,664,101	176,835,837	131,664,101
Maximum sales proceeds from at the market offering				$ 75,000,000	$ 100,000,000
Shares issued	2,514,996
Warrants cancelable upon non exercise of Second Fairfax warrants									12,500,000
Class A Common Shares [Member] | GCI [Member]
Class Of Stock [Line Items]
Shares issued				2,514,996
Shares issued, value as a part of consideration paid for aquisition				$ 13,908,000
Common Class B [Member]
Class Of Stock [Line Items]
Common shares, authorized									25,000,000
Common shares, outstanding								0	0	0
Common Class C
Class Of Stock [Line Items]
Common shares, authorized									100
Common shares, outstanding								0	0	0
Series I Preferred Stock [Member]
Class Of Stock [Line Items]
Preferred shares, issued			6,000,000						6,000,000
Proceeds from issuance of preferred shares, gross			$ 150,000,000
Dividend rate percentage			8.00%						8.00%
Series I Preferred Stock [Member] | LIBOR [Member]
Class Of Stock [Line Items]
Dividend payment terms			three-month
Preferred stock margins for dividend payments			5.008%
Series D, Series E, Series G and Series H Preferred Share [Member]
Class Of Stock [Line Items]
Maximum sales proceeds from at the market offering							$ 150,000,000
Value of shares authorized for repurchase						$ 10,000,000		$ 0	$ 0	$ 0
Expiration of share repurchase authorization						2017-12
Series D, Series E, Series G and Series H Preferred Share [Member] | Follow-on Public Offering [Member]
Class Of Stock [Line Items]
Preferred shares, issued								121,077	0	121,077
Proceeds from issuance of preferred shares, gross										$ 2,957,000
Series D Preferred Shares [Member]
Class Of Stock [Line Items]
Preferred shares, issued									7,017,313
Dividend rate percentage									7.95%
Series D Preferred Shares [Member] | GCI [Member]
Class Of Stock [Line Items]
Preferred shares, issued	1,986,449
Preferred stock option redeemable period start	18 months
Preferred stock option redeemable period end	19 months
Puttable preferred shares, par value	$ 23.74
Preferred stock redemption value per share	$ 24.84
Preferred stock accreted value									$ 48,139,000	$ 0
Common Shares [Member]
Class Of Stock [Line Items]
Shares issued, shares									0
Common Shares [Member] | Class A Common Shares [Member]
Class Of Stock [Line Items]
Shares issued, shares									2,514,996	19,550,000	6,770,408
At-the-Market [Member] | Class A Common Shares [Member]
Class Of Stock [Line Items]
Shares issued, shares		11,800,000						6,750,000
Proceeds from issuance of common shares, gross		$ 74,953,000						$ 40,395,000
Fairfax Warrants [Member] | Class A Common Shares [Member]
Class Of Stock [Line Items]
Number of shares purchased									1
Warrants exercise price									$ 6.50
Warrant exercisable period									7 years
Warrants to purchase common shares												38,461,539
Second Fairfax Warrants [Member] | Class A Common Shares [Member]
Class Of Stock [Line Items]
Warrants exercise price									$ 8.05
Warrant exercisable period									7 years
Warrants to purchase common shares									25,000,000

Puttable Preferred Shares and_4

Puttable Preferred Shares and Share Capital - Schedule of Preferred Shares Outstanding (Detail) - USD ($)	1 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2018	Dec. 31, 2017
Class Of Stock [Line Items]
Preferred shares, authorized		150,000,000	150,000,000
Shares Issued		33,272,706	32,872,706
Series A Preferred Shares [Member]
Class Of Stock [Line Items]
Preferred shares, authorized		315,000
Shares Issued		0
Dividend rate per annum		0.00%
Liquidation preference		$ 0	$ 0
Series B Preferred Shares [Member]
Class Of Stock [Line Items]
Preferred shares, authorized		260,000
Shares Issued		0
Dividend rate per annum		0.00%
Liquidation preference		$ 0	0
Series C Preferred Shares [Member]
Class Of Stock [Line Items]
Preferred shares, authorized		40,000,000
Shares Issued		0
Dividend rate per annum		0.00%
Liquidation preference		$ 0	0
Series D Preferred Shares [Member]
Class Of Stock [Line Items]
Preferred shares, authorized		20,000,000
Shares Issued		7,017,313
Dividend rate per annum		7.95%
Redemption by Company permitted on or after		Jan. 30, 2018
Liquidation preference		$ 175,433,000	125,772,000
Series E Preferred Shares [Member]
Class Of Stock [Line Items]
Preferred shares, authorized		15,000,000
Shares Issued		5,415,937
Dividend rate per annum		8.25%
Redemption by Company permitted on or after		Feb. 13, 2019
Liquidation preference		$ 135,398,000	135,398,000
Series F Preferred Shares [Member]
Class Of Stock [Line Items]
Preferred shares, authorized		20,000,000
Liquidation preference			140,000,000
Series G Preferred Shares [Member]
Class Of Stock [Line Items]
Preferred shares, authorized		15,000,000
Shares Issued		7,800,800
Dividend rate per annum		8.20%
Redemption by Company permitted on or after		Jun. 16, 2021
Liquidation preference		$ 195,020,000	195,020,000
Series H Preferred Shares [Member]
Class Of Stock [Line Items]
Preferred shares, authorized		15,000,000
Shares Issued		9,025,105
Dividend rate per annum		7.875%
Redemption by Company permitted on or after		Aug. 11, 2021
Liquidation preference		$ 225,628,000	225,628,000
Series I Preferred Stock [Member]
Class Of Stock [Line Items]
Preferred shares, authorized		6,000,000
Shares Issued	6,000,000	6,000,000
Dividend rate per annum	8.00%	8.00%
Redemption by Company permitted on or after		Oct. 30, 2023
Liquidation preference		$ 150,000,000	0
Series R Preferred Shares [Member]
Class Of Stock [Line Items]
Preferred shares, authorized		1,000,000
Shares Issued		0
Dividend rate per annum		0.00%
Liquidation preference		$ 0	$ 0

Puttable Preferred Shares and_5

Puttable Preferred Shares and Share Capital - Schedule of Preferred Shares Outstanding (Parenthetical) (Detail) - USD ($)	1 Months Ended
	Jul. 31, 2018	Dec. 31, 2018	Mar. 13, 2018	Dec. 31, 2017
Class Of Stock [Line Items]
Puttable preferred shares, issued		1,986,449		0
Series D Preferred Shares [Member]
Class Of Stock [Line Items]
Puttable preferred shares, issued		1,986,449	1,986,449
Puttable preferred shares, aggregate liquidation preference		$ 49,661,000
Redemption price per share		$ 25
Series E Preferred Shares [Member]
Class Of Stock [Line Items]
Redemption price per share		25
Series G Preferred Shares [Member]
Class Of Stock [Line Items]
Redemption price per share		25
Series H Preferred Shares [Member]
Class Of Stock [Line Items]
Redemption price per share		$ 25
Series F Preferred Shares [Member]
Class Of Stock [Line Items]
Redemption amount	$ 140,000,000
Accrued dividends	$ 3,430,000

Earnings per share - Schedule o

Earnings per share - Schedule of Reconciliation of Numerator and Denominator Used in Basic and Diluted EPS Computations (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Earnings Per Share Basic [Line Items]
Net earnings (loss)	$ 278,798	$ 175,237	$ (139,039)
Earnings (loss) attributable to common shareholders	207,569	110,761	(194,736)
Share-based compensation	0	0	0
2018 Warrants and New Warrants	0
Earnings (loss) attributable to common shareholders, diluted	$ 207,569	$ 110,761	$ (194,736)
Earnings (loss) attributable to common shareholders, shares	154,848,000	117,524,000	102,869,000
Share-based compensation, shares	91,000	81,400	0
2018 Warrants and New Warrants, shares	3,129,000
Earnings (loss) attributable to common shareholders, diluted shares	158,068,000	117,605,400	102,869,000
Earnings (loss) attributable to common shareholders, per share amount	$ 1.34	$ 0.94	$ (1.89)
Earnings (loss) attributable to common shareholders, per share diluted amount	$ 1.31	$ 0.94	$ (1.89)
Series C Preferred Shares [Member]
Earnings Per Share Basic [Line Items]
Preferred share dividends			$ (14,420)
Series D Preferred Shares [Member]
Earnings Per Share Basic [Line Items]
Preferred share dividends	$ (14,610)	$ (9,925)	(9,900)
Series E Preferred Shares [Member]
Earnings Per Share Basic [Line Items]
Preferred share dividends	(11,170)	(11,100)	(11,077)
Series F Preferred Shares [Member]
Earnings Per Share Basic [Line Items]
Preferred share dividends	(8,289)	(9,730)	(6,055)
Series G Preferred Shares [Member]
Earnings Per Share Basic [Line Items]
Preferred share dividends	(15,992)	(15,990)	(7,404)
Series H Preferred Shares [Member]
Earnings Per Share Basic [Line Items]
Preferred share dividends	(17,768)	$ (17,731)	$ (6,841)
Series I Preferred Stock [Member]
Earnings Per Share Basic [Line Items]
Preferred share dividends	$ (3,400)

Share-based compensation - Addi

Share-based compensation - Additional Information (Detail) - USD ($)	1 Months Ended					12 Months Ended
	Dec. 31, 2018	Jan. 31, 2018	Aug. 31, 2017	Jul. 31, 2017	May 31, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total shares of common stock reserved for issuance under the plan							5,000,000		3,000,000
Remaining shares left for issuance under this plan	2,187,420					2,187,420	2,952,896
Share-based compensation expenses						$ 2,989,000	$ 10,400,000	$ 6,228,000
Total unrecognized compensation costs relating to unvested share-based compensation awards	$ 1,474,000					$ 1,474,000	$ 4,178,000
Expected to be recognized over a weighted average period						24 months	24 months
Transaction Fees [Member] | Vessels [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Transaction fees capitalized to vessels						$ 2,326,000	$ 2,262,000	6,317,000
Arrangement Fees [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Arrangement fees capitalized to deferred financing fees							1,872,000	$ 7,598,000
Restricted shares [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period						1 year
Total fair value of shares vested						$ 1,018,000	$ 880,000
Granted, stock units						664,326	107,270	56,861
Weighted average grant date fair value						$ 7.68	$ 8.97	$ 15.48
Phantom share units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period						3 years
Outstanding phantom share units vested and available for exchange	537,002					537,002	587,001
Granted, stock units						30,000	90,000	60,000
Weighted average grant date fair value						$ 6.86	$ 6.85	$ 18.84
Restricted stock units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period						3 years
Granted, stock units						109,248	88,293	528,232
Retention requirement description						The restricted stock units generally vest over three years, in equal one-third amounts on each anniversary date of the date of the grant.
Expiration date						Jun. 30, 2018
Weighted average grant date fair value						$ 9.73	$ 5.93	$ 16.57
Stock options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted, stock units						500,000	0	0
Weighted average grant date fair value						$ 7.20	$ 0	$ 0
Chief Executive Officer [Member] | Restricted shares [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period	5 years
Granted, stock units	500,000
Chief Executive Officer [Member] | Restricted stock units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted, stock units					479,714
Chief Executive Officer [Member] | Stock options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period		5 years
Stock options, vesting description		The stock options vest equally on each of the first five anniversaries of the CEO’s start date in January 2018 and expire on January 8, 2028. As at December 31, 2018, no stock options have been vested.
Stock options, vesting start date		Jan. 31, 2018
Expiration date		Jan. 8, 2028
Chief Executive Officer [Member] | Performance Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted, stock units					786,147
Weighted average grant date fair value					$ 10.23
Director And Officer | Restricted stock units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted, stock units						12,441
Weighted average grant date fair value						$ 7.28
Class A Common Shares [Member] | Transaction Fees [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Transaction fees settled in Class A common shares							$ 2,231,000	$ 3,159,000
Class A Common Shares [Member] | Arrangement Fees [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Transaction fees settled in Class A common shares							1,872,000	$ 3,799,000
Class A Common Shares [Member] | Chairman [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation expenses							6,920,000,000
Common shares granted				1,000,000
Purchase of common shares by chairman			1,000,000
Common shares purchased, price per share			$ 6
Class A Common Shares [Member] | Chief Executive Officer [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, shares Issued to CEO					200,000
Class A Common Shares [Member] | Chief Executive Officer [Member] | Stock options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares issuable upon exercise of options		500,000
Stock options, exercise price		$ 7.20
Class A Common Shares [Member] | Director [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Termination fee paid							$ 6,250,000
Termination fee paid, shares							945,537

Share-based compensation - Summ

Share-based compensation - Summary of Outstanding Restricted Shares, Phantom Share Units, Stock Appreciation Rights and Restricted Stock Units (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Restricted shares [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares, Beginning balance	94,533	56,861	44,947
Number of shares, Granted	664,326	107,270	56,861
Number of shares, Vested	(119,509)	(56,861)	(44,947)
Number of shares, Exchanged	0		0
Number of shares, Expired	0	0	0
Number of shares, Cancelled	(53,608)	(12,737)	0
Number of shares, Ending balance	585,742	94,533	56,861
W.A. grant date FV, Beginning balance	$ 8.89	$ 15.48	$ 18.39
W.A. grant date FV, Granted	7.68	8.97	15.48
W.A. grant date FV, Vested	8.52	15.48	18.39
W.A. grant date FV, Exchanged	0		0
W.A. grant date FV, Expired	0	0	0
W.A. grant date FV, Cancelled	7.10	9.53	0
W.A. grant date FV, Ending balance	$ 7.76	$ 8.89	$ 15.48
Phantom share units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares, Beginning balance	727,001	637,001	647,001
Number of shares, Granted	30,000	90,000	60,000
Number of shares, Vested	0	0	0
Number of shares, Exchanged	(113,333)		(70,000)
Number of shares, Expired	0	0	0
Number of shares, Cancelled	(76,666)	0	0
Number of shares, Ending balance	567,002	727,001	637,001
W.A. grant date FV, Beginning balance	$ 13.60	$ 14.55	$ 14.73
W.A. grant date FV, Granted	6.86	6.85	18.84
W.A. grant date FV, Vested	0	0	0
W.A. grant date FV, Exchanged	18.80		19.91
W.A. grant date FV, Expired	0	0	0
W.A. grant date FV, Cancelled	7.90	0	0
W.A. grant date FV, Ending balance	$ 12.97	$ 13.60	$ 14.55
Stock appreciation rights (SARs) [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares, Beginning balance	485,974	2,438,197	5,876,811
Number of shares, Granted	0	0	0
Number of shares, Vested	0	0	0
Number of shares, Exchanged	0		0
Number of shares, Expired	(485,974)	(1,929,260)	(3,438,614)
Number of shares, Cancelled	0	(22,963)	0
Number of shares, Ending balance	0	485,974	2,438,197
W.A. grant date FV, Beginning balance	$ 3.40	$ 2.29	$ 2.30
W.A. grant date FV, Granted	0	0	0
W.A. grant date FV, Vested	0	0	0
W.A. grant date FV, Exchanged	0		0
W.A. grant date FV, Expired	3.40	2	2.26
W.A. grant date FV, Cancelled	0	3.40	0
W.A. grant date FV, Ending balance	$ 0	$ 3.40	$ 2.29
Restricted stock units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares, Beginning balance	71,184	523,387	32,828
Number of shares, Granted	109,248	88,293	528,232
Number of shares, Vested	(83,220)	(537,216)	(37,374)
Number of shares, Exchanged	0		0
Number of shares, Expired	0	0	0
Number of shares, Cancelled	(12,441)	(3,280)	(299)
Number of shares, Ending balance	84,771	71,184	523,387
W.A. grant date FV, Beginning balance	$ 7.80	$ 16.71	$ 21.03
W.A. grant date FV, Granted	9.73	5.93	16.57
W.A. grant date FV, Vested	9.87	16.16	18.56
W.A. grant date FV, Exchanged	0		0
W.A. grant date FV, Expired	0	0	0
W.A. grant date FV, Cancelled	7.28	9.16	20.21
W.A. grant date FV, Ending balance	$ 8.33	$ 7.80	$ 16.71
Stock options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares, Beginning balance	0	0	0
Number of shares, Granted	500,000	0	0
Number of shares, Vested	0	0	0
Number of shares, Exchanged	0		0
Number of shares, Expired	0	0	0
Number of shares, Cancelled	0	0	0
Number of shares, Ending balance	500,000	0	0
W.A. grant date FV, Beginning balance	$ 0	$ 0	$ 0
W.A. grant date FV, Granted	7.20	0	0
W.A. grant date FV, Vested	0	0	0
W.A. grant date FV, Exchanged	0		0
W.A. grant date FV, Expired	0	0	0
W.A. grant date FV, Cancelled	0	0	0
W.A. grant date FV, Ending balance	$ 7.20	$ 0	$ 0

Other information - Schedule of

Other information - Schedule of Accounts Payable and Accrued Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Payables And Accruals [Abstract]
Due to related parties (note 4)	$ 0	$ 1,386
Accrued interest	20,276	14,614
Accounts payable and other accrued liabilities	49,935	47,220
Accounts payable and accrued liabilities, Total	$ 70,211	$ 63,220

Other information - Schedule _2

Other information - Schedule of Supplemental Cash Flow Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Supplemental Cash Flow Information [Line Items]
Interest paid on debt	$ 194,316	$ 111,180	$ 109,272
Interest received	3,737	6,829	8,041
Undrawn credit facility fee paid	619	2,444	2,856
Non-cash transactions:
Dividend reinvestment	22,807	21,785	4,359
Settlement of loans to affiliate on acquisition	38,849	0	0
Capital contribution through settlement of loans to affiliate	0	6,667	0
Issuance of New Warrants (note 4)	67,523	0	0
Offset of swaption against swap liability termination	0	10,852	0
Repayment of debt from sale-leaseback transaction proceeds	0	53,247	0
Arrangement and Transaction Fees Settled in Shares [Member]
Non-cash transactions:
Arrangement and transaction fees settled in shares (note 14)	2,326	4,199	6,393
GCI [Member]
Non-cash transactions:
Settlement of loans to affiliate on acquisition	0	0	107,500
Carrying value of previously held equity in GCI settled on acquisition (note 3)	61,891	0	0
Settlement of GCI transaction fees paid by the Company (note 3)	15,224	0	0
GCI [Member] | Time Charter Contracts [Member]
Non-cash transactions:
Acquisition of time charters through novation from GCI	0	0	16,200
GCI [Member] | Bareboat Charter Contracts [Member]
Non-cash transactions:
Recognition of fair value of bareboat charters	0	0	16,200
Class A Common Shares [Member]
Non-cash transactions:
Issuance of shares on acquisition (note 3)	13,908	0	0
Series D Preferred Shares [Member]
Non-cash transactions:
Issuance of shares on acquisition (note 3)	$ 47,158	$ 0	$ 0

Other information - Schedule _3

Other information - Schedule of Reconciliation of Cash, Cash Equivalents and Restricted Cash (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Supplemental Cash Flow Elements [Abstract]
Cash and cash equivalents	$ 357,327	$ 253,176	$ 367,901
Restricted cash included in other assets (note 8)	$ 14,067	$ 14,060	$ 14,059
Restricted Cash, Noncurrent, Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherAssetsNoncurrent	us-gaap:OtherAssetsNoncurrent	us-gaap:OtherAssetsNoncurrent
Total cash, cash equivalents and restricted cash	$ 371,394	$ 267,236	$ 381,960

Commitments and contingencies -

Commitments and contingencies - Schedule of Future Minimum Revenues to be Received on Committed Agreements (Detail) $ in Thousands	Dec. 31, 2018USD ($)
Leases [Abstract]
2019	$ 1,094,608
2020	977,926
2021	844,261
2022	688,537
2023	469,754
Thereafter	751,473
Future minimum revenues receivable	$ 4,826,559

Commitments and contingencies_2

Commitments and contingencies - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Other Commitments [Line Items]
Percentage of future minimum revenues utilization	100.00%	0.00%
Outstanding commitments for installment payments	$ 0	$ 140,600,000
Operating leases, future minimum payments due	1,287,475,000
Vessels [Member]
Other Commitments [Line Items]
Operating leases, future minimum payments due	$ 1,279,074,000
Operating leases, start year	2019
Operating leases, expiration year	2029
Office Space [Member]
Other Commitments [Line Items]
Operating leases, future minimum payments due	$ 8,401,000
Operating leases, start year	2019
Operating leases, expiration year	2024

Commitments and contingencies_3

Commitments and contingencies - Schedule of Commitment Under Operating Leases (Detail) $ in Thousands	Dec. 31, 2018USD ($)
Leases [Abstract]
2019	$ 159,976
2020	159,171
2021	158,326
2022	151,696
2023	150,760
Thereafter	507,546
Operating leases, future minimum payments due	$ 1,287,475

Concentrations - Schedule of Re

Concentrations - Schedule of Revenue Derived from Customers (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenue, Major Customer [Line Items]
Revenue	$ 1,096,331	$ 831,324	$ 877,905
COSCO [Member]
Revenue, Major Customer [Line Items]
Revenue	412,276	387,680	424,806
Yang Ming Marine [Member]
Revenue, Major Customer [Line Items]
Revenue	235,557	141,518	121,576
MOL [Member]
Revenue, Major Customer [Line Items]
Revenue	162,646	123,333	117,891
Other [Member]
Revenue, Major Customer [Line Items]
Revenue	$ 285,852	$ 178,793	$ 213,632

Financial instruments - Additio

Financial instruments - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Derivative [Line Items]
Carrying value, long-term debt	$ 3,487,541,000	$ 2,450,633,000
Fair value of long-term obligations under capital lease excluding deferred financing fees	660,919,000	653,007,000
Carrying value of long-term capital lease obligations excluding deferred financing fees	647,664,000	648,840,000
Carrying value of vessels	8,004,011,000	6,262,453,000
Non-cash impairment charge	0	0	$ 285,195,000
Amount that would be settled in cash in the next 12 months	27,022,000
Payments for swap terminations		8,107,000	31,211,000
Derivative asset liability subject to master netting arrangement	0	0
Estimated accumulated other comprehensive loss expected to be reclassified to net earnings	1,051,000
Vessels [Member]
Derivative [Line Items]
Carrying value of vessels		6,116,091,000
Fair Value Measured on Non-recurring Basis [Member] | Vessels [Member]
Derivative [Line Items]
Carrying value of vessels			619,521,000
Non-cash impairment charge			285,195,000
Fair Value Measured on Non-recurring Basis [Member] | Level 2 [Member] | Vessels [Member]
Derivative [Line Items]
Fair value of vessels held for use			$ 334,326,000
Senior Unsecured Notes [Member]
Derivative [Line Items]
Carrying value, long-term debt	400,396,000	417,925,000
Fair value, long-term debt	400,049,000	423,184,000
Senior Notes Due 2025 [Member]
Derivative [Line Items]
Carrying value, long-term debt	166,608,000
Fair value, long-term debt	236,349,000
Revolving and Term Loan Credit Facilities [Member]
Derivative [Line Items]
Fair value, long-term debt excluding deferred financing fees	2,875,691,000	1,940,215,000
Carrying value, long-term debt	$ 2,944,602,000	$ 2,050,137,000

Financial instruments - Schedul

Financial instruments - Schedule of Outstanding Interest Rate Derivatives (Detail)	12 Months Ended
	Dec. 31, 2018USD ($)
5.8700% [Member]
Derivative [Line Items]
Fixed per annum rate swapped for LIBOR	5.87%
Derivative, notional amount	$ 539,114,000
Effective date	Aug. 31, 2017
Ending date	Nov. 28, 2025
5.8700% [Member] | Maximum [Member]
Derivative [Line Items]
Derivative, notional amount	$ 539,114,000
5.4200% [Member]
Derivative [Line Items]
Fixed per annum rate swapped for LIBOR	5.42%
Derivative, notional amount	$ 362,437,000
Effective date	Sep. 6, 2007
Ending date	May 31, 2024
5.4200% [Member] | Maximum [Member]
Derivative [Line Items]
Derivative, notional amount	$ 362,437,000
5.6000% [Member]
Derivative [Line Items]
Fixed per annum rate swapped for LIBOR	5.60%
Derivative, notional amount	$ 121,600,000
Effective date	Jun. 23, 2010
Ending date	Dec. 23, 2021
5.6000% [Member] | Maximum [Member]
Derivative [Line Items]
Derivative, notional amount	$ 121,600,000
3.2675% [Member]
Derivative [Line Items]
Fixed per annum rate swapped for LIBOR	3.2675%
Derivative, notional amount	$ 69,882,000
Effective date	Sep. 8, 2015
Ending date	Sep. 8, 2020
3.2675% [Member] | Maximum [Member]
Derivative [Line Items]
Derivative, notional amount	$ 69,882,000
3.0900% [Member]
Derivative [Line Items]
Fixed per annum rate swapped for LIBOR	3.09%
Derivative, notional amount	$ 68,443,000
Effective date	Jun. 5, 2015
Ending date	Jun. 5, 2020
3.0900% [Member] | Maximum [Member]
Derivative [Line Items]
Derivative, notional amount	$ 68,443,000
1.6000% [Member]
Derivative [Line Items]
Fixed per annum rate swapped for LIBOR	1.60%
Derivative, notional amount	$ 42,293,000
Effective date	Apr. 7, 2014
Ending date	Mar. 20, 2019
1.6000% [Member] | Maximum [Member]
Derivative [Line Items]
Derivative, notional amount	$ 42,293,000

Financial instruments - Sched_2

Financial instruments - Schedule of Outstanding Interest Rate Derivatives (Parenthetical) (Detail)	Dec. 31, 2018USD ($)
5.8700% [Member]
Derivative [Line Items]
Fair value laibility	$ 68,728,000

Financial instruments - Sched_3

Financial instruments - Schedule of Derivatives (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Interest Rate Swaps [Member]
Offsetting Assets [Line Items]
Fair value of financial instruments asset	$ 113	$ 0
Fair value of financial instruments liability	115,853	168,860
Derivative Put Instrument [Member]
Offsetting Assets [Line Items]
Fair value of financial instruments liability	$ 11,319	$ 0

Financial instruments - Sched_4

Financial instruments - Schedule of Gains and Losses Reclassified from Accumulated Other Comprehensive Loss into Earnings (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Earnings (loss) on derivatives recognized in net earnings:
Change in fair value of financial instruments	$ 15,490	$ (12,631)	$ (29,118)
Interest Rate Swaps [Member]
Earnings (loss) on derivatives recognized in net earnings:
Change in fair value of financial instruments	14,669	(12,631)	(29,118)
Derivative Put Instrument [Member]
Earnings (loss) on derivatives recognized in net earnings:
Change in fair value of financial instruments	821	0	0
Interest Expense [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Loss reclassified from AOCL to net earnings
Depreciation and amortization/Interest expense	(333)	(1,927)	(3,407)
Depreciation and Amortization [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Loss reclassified from AOCL to net earnings
Depreciation and amortization/Interest expense	$ (784)	$ (932)	$ (966)

Guarantor Financial Informati_3

Guarantor Financial Information - Consolidated Balance Sheets (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 357,327	$ 253,176	$ 367,901
Short-term investments	2,532	104
Accounts receivable	13,001	11,678
Intercompany accounts receivable	0
Loans to affiliate	0	36,100
Prepaid expenses and other	36,519	44,869
Gross investment in lease	44,348	35,478
Fair value of financial instruments	113	0
Total current assets	453,840	381,405
Vessels	5,926,274	4,537,216
Gross investment in lease	817,631	687,896
Goodwill	75,321	75,321
Intercompany accounts receivable (payable)		0
Investment in subsidiaries	0	0
Other assets	204,931	196,304
Total assets	7,477,997	5,878,142
Current liabilities:
Accounts payable and accrued liabilities	70,211	63,220
Intercompany accounts payable	0
Loans from affiliate	0
Current portion of deferred revenue	55,915	55,367
Current portion of long-term debt	722,641	257,800
Current portion of long-term obligations under capital lease	48,384	43,912
Current portion of other long-term liabilities	32,243	23,635
Total current liabilities	929,394	443,934
Deferred revenue	376,884	328,681
Long-term debt	2,764,900	2,192,833
Long-term obligations under capital lease	591,372	595,016
Other long-term liabilities	180,157	199,386
Fair value of financial instruments	127,172	168,860
Total liabilities	4,969,879	3,928,710
Puttable preferred shares	48,139	0
Shareholders’ equity:
Share capital	2,102	1,646
Treasury shares	(371)	(377)
Additional paid in capital	3,126,457	2,752,988
Retained earnings (deficit)	(645,638)	(781,137)
Accumulated other comprehensive loss	(22,571)	(23,688)
Total shareholders' equity	2,459,979	1,949,432	$ 1,747,249	$ 1,776,183
Total liabilities and shareholders' equity	7,477,997	5,878,142
Eliminations [Member]
Current assets:
Cash and cash equivalents	0	0
Short-term investments	0	0
Accounts receivable	0	(50,972)
Intercompany accounts receivable	(236,519)
Loans to affiliate	(36,527)	0
Prepaid expenses and other	(22,088)	(15,454)
Gross investment in lease	0	0
Fair value of financial instruments	0
Total current assets	(295,134)	(66,426)
Vessels	(723)	0
Gross investment in lease	0	0
Goodwill	0	0
Intercompany accounts receivable (payable)		0
Investment in subsidiaries	(1,528,367)	(534,615)
Other assets	(10,479)	(10,417)
Total assets	(1,834,703)	(611,458)
Current liabilities:
Accounts payable and accrued liabilities	0	(50,001)
Intercompany accounts payable	(236,519)
Loans from affiliate	(36,527)
Current portion of deferred revenue	(20,985)	(15,455)
Current portion of long-term debt	0	0
Current portion of long-term obligations under capital lease	0	0
Current portion of other long-term liabilities	0	0
Total current liabilities	(294,031)	(65,456)
Deferred revenue	0	0
Long-term debt	0	0
Long-term obligations under capital lease	0	0
Other long-term liabilities	(11,740)	(11,346)
Fair value of financial instruments	0	0
Total liabilities	(305,771)	(76,802)
Puttable preferred shares	0
Shareholders’ equity:
Share capital	(963,201)	(75,088)
Treasury shares	0	0
Additional paid in capital	(349,866)	(343,227)
Retained earnings (deficit)	(215,865)	(116,341)
Accumulated other comprehensive loss	0	0
Total shareholders' equity	(1,528,932)	(534,656)
Total liabilities and shareholders' equity	(1,834,703)	(611,458)
Parent Issuer [Member]
Current assets:
Cash and cash equivalents	218,903	146,328
Short-term investments	0	0
Accounts receivable	1,926	37,303
Intercompany accounts receivable	169,170
Loans to affiliate	36,527	36,100
Prepaid expenses and other	24,045	29,037
Gross investment in lease	44,348	35,478
Fair value of financial instruments	0
Total current assets	494,919	284,246
Vessels	3,813,906	3,918,672
Gross investment in lease	817,631	687,896
Goodwill	0	0
Intercompany accounts receivable (payable)		(11,594)
Investment in subsidiaries	951,062	474,713
Other assets	100,264	116,154
Total assets	6,177,782	5,470,087
Current liabilities:
Accounts payable and accrued liabilities	29,443	35,307
Intercompany accounts payable	48,942
Loans from affiliate	0
Current portion of deferred revenue	51,191	54,578
Current portion of long-term debt	619,839	239,858
Current portion of long-term obligations under capital lease	32,050	28,534
Current portion of other long-term liabilities	23,594	23,635
Total current liabilities	805,059	381,912
Deferred revenue	376,884	327,641
Long-term debt	1,732,110	2,001,504
Long-term obligations under capital lease	459,520	445,279
Other long-term liabilities	169,934	195,459
Fair value of financial instruments	126,157	168,860
Total liabilities	3,669,664	3,520,655
Puttable preferred shares	48,139
Shareholders’ equity:
Share capital	2,102	1,646
Treasury shares	(371)	(377)
Additional paid in capital	3,126,457	2,752,988
Retained earnings (deficit)	(645,638)	(781,137)
Accumulated other comprehensive loss	(22,571)	(23,688)
Total shareholders' equity	2,459,979	1,949,432
Total liabilities and shareholders' equity	6,177,782	5,470,087
Guarantors [Member]
Current assets:
Cash and cash equivalents	32,017	77,712
Short-term investments	105	104
Accounts receivable	7,707	25,347
Intercompany accounts receivable	65,173
Loans to affiliate	0	0
Prepaid expenses and other	33,388	30,348
Gross investment in lease	0	0
Fair value of financial instruments	0
Total current assets	138,390	133,511
Vessels	294,305	286,342
Gross investment in lease	0	0
Goodwill	75,321	75,321
Intercompany accounts receivable (payable)		11,189
Investment in subsidiaries	577,305	59,902
Other assets	18,978	81,463
Total assets	1,104,299	647,728
Current liabilities:
Accounts payable and accrued liabilities	38,620	75,125
Intercompany accounts payable	38,499
Loans from affiliate	0
Current portion of deferred revenue	20,985	16,104
Current portion of long-term debt	0	0
Current portion of long-term obligations under capital lease	16,334	15,378
Current portion of other long-term liabilities	0	0
Total current liabilities	114,438	106,607
Deferred revenue	0	1,040
Long-term debt	0	0
Long-term obligations under capital lease	131,852	149,737
Other long-term liabilities	15,530	15,273
Fair value of financial instruments	0	0
Total liabilities	261,820	272,657
Puttable preferred shares	0
Shareholders’ equity:
Share capital	436,669	41,789
Treasury shares	0	0
Additional paid in capital	233,739	233,739
Retained earnings (deficit)	172,071	99,543
Accumulated other comprehensive loss	0	0
Total shareholders' equity	842,479	375,071
Total liabilities and shareholders' equity	1,104,299	647,728
Non-Guarantors [Member]
Current assets:
Cash and cash equivalents	106,407	29,136
Short-term investments	2,427	0
Accounts receivable	3,368	0
Intercompany accounts receivable	2,176
Loans to affiliate	0	0
Prepaid expenses and other	1,174	938
Gross investment in lease	0	0
Fair value of financial instruments	113
Total current assets	115,665	30,074
Vessels	1,818,786	332,202
Gross investment in lease	0	0
Goodwill	0	0
Intercompany accounts receivable (payable)		405
Investment in subsidiaries	0	0
Other assets	96,168	9,104
Total assets	2,030,619	371,785
Current liabilities:
Accounts payable and accrued liabilities	2,148	2,789
Intercompany accounts payable	149,078
Loans from affiliate	36,527
Current portion of deferred revenue	4,724	140
Current portion of long-term debt	102,802	17,942
Current portion of long-term obligations under capital lease	0	0
Current portion of other long-term liabilities	8,649	0
Total current liabilities	303,928	20,871
Deferred revenue	0	0
Long-term debt	1,032,790	191,329
Long-term obligations under capital lease	0	0
Other long-term liabilities	6,433	0
Fair value of financial instruments	1,015	0
Total liabilities	1,344,166	212,200
Puttable preferred shares	0
Shareholders’ equity:
Share capital	526,532	33,299
Treasury shares	0	0
Additional paid in capital	116,127	109,488
Retained earnings (deficit)	43,794	16,798
Accumulated other comprehensive loss	0	0
Total shareholders' equity	686,453	159,585
Total liabilities and shareholders' equity	$ 2,030,619	$ 371,785

Guarantor Financial Informati_4

Guarantor Financial Information - Consolidated Statements of Operations (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Condensed Income Statements Captions [Line Items]
Revenue	$ 1,096,331,000	$ 831,324,000	$ 877,905,000
Operating expenses:
Ship operating	219,270,000	183,916,000	192,327,000
Cost of services, supervision fees		1,300,000	7,390,000
Depreciation and amortization	245,801,000	199,938,000	216,098,000
General and administrative	31,565,000	40,091,000	32,118,000
Operating leases	129,747,000	115,544,000	85,910,000
Loss (gain) on disposals	0	(13,604,000)	31,876,000
Expenses related to customer bankruptcy	0	1,013,000	19,732,000
Vessel impairments	0	0	285,195,000
Total operating expenses	626,383,000	528,198,000	870,646,000
Operating earnings	469,948,000	303,126,000	7,259,000
Other expenses (income):
Interest expense and amortization of deferred financing fees	212,065,000	116,389,000	119,882,000
Interest income	(4,197,000)	(4,558,000)	(8,455,000)
Refinancing expenses	0	0	1,962,000
Acquisition related gain on contract settlement	(2,430,000)	0	0
Change in fair value of financial instruments	(15,490,000)	12,631,000	29,118,000
Equity income on consolidated subsidiaries	0
Equity income on investment (note 7)	(1,216,000)	(5,835,000)	(188,000)
Other expense (income)	2,418,000	9,262,000	3,979,000
Total other expenses (income)	191,150,000	127,889,000	146,298,000
Net earnings (loss)	278,798,000	175,237,000	(139,039,000)
Eliminations [Member]
Condensed Income Statements Captions [Line Items]
Revenue	(282,129,000)	(248,135,000)	(259,521,000)
Operating expenses:
Ship operating	(257,819,000)	(219,263,000)	(232,829,000)
Cost of services, supervision fees		0	0
Depreciation and amortization	0	0	0
General and administrative	(24,310,000)	(28,872,000)	(26,692,000)
Operating leases	0	0	0
Loss (gain) on disposals		0	0
Expenses related to customer bankruptcy		0	0
Vessel impairments		0	0
Total operating expenses	(282,129,000)	(248,135,000)	(259,521,000)
Operating earnings	0	0	0
Other expenses (income):
Interest expense and amortization of deferred financing fees	(345,000)	0	0
Interest income	345,000	0	0
Refinancing expenses			0
Acquisition related gain on contract settlement	0
Change in fair value of financial instruments	0	0	0
Equity income on consolidated subsidiaries	171,232,000
Equity income on investment (note 7)	0	35,939,000	16,488,000
Other expense (income)	0	0	(1,000)
Total other expenses (income)	171,232,000	35,939,000	16,487,000
Net earnings (loss)	(171,232,000)	(35,939,000)	(16,487,000)
Parent Issuer [Member]
Condensed Income Statements Captions [Line Items]
Revenue	876,894,000	797,317,000	835,851,000
Operating expenses:
Ship operating	243,311,000	211,966,000	229,439,000
Cost of services, supervision fees		0	0
Depreciation and amortization	181,397,000	173,464,000	188,816,000
General and administrative	33,327,000	52,742,000	42,507,000
Operating leases	111,008,000	98,175,000	74,175,000
Loss (gain) on disposals		(1,000)	31,876,000
Expenses related to customer bankruptcy		472,000	7,342,000
Vessel impairments		0	285,195,000
Total operating expenses	569,043,000	536,818,000	859,350,000
Operating earnings	307,851,000	260,499,000	(23,499,000)
Other expenses (income):
Interest expense and amortization of deferred financing fees	149,696,000	97,762,000	101,009,000
Interest income	(3,812,000)	(4,146,000)	(8,273,000)
Refinancing expenses			1,962,000
Acquisition related gain on contract settlement	0
Change in fair value of financial instruments	(15,720,000)	11,894,000	28,616,000
Equity income on consolidated subsidiaries	(102,650,000)
Equity income on investment (note 7)	0	(29,013,000)	(11,176,000)
Other expense (income)	1,539,000	8,765,000	3,402,000
Total other expenses (income)	29,053,000	85,262,000	115,540,000
Net earnings (loss)	278,798,000	175,237,000	(139,039,000)
Guarantors [Member]
Condensed Income Statements Captions [Line Items]
Revenue	266,906,000	237,056,000	250,606,000
Operating expenses:
Ship operating	191,151,000	180,349,000	185,750,000
Cost of services, supervision fees		1,300,000	7,390,000
Depreciation and amortization	13,846,000	13,317,000	14,172,000
General and administrative	21,586,000	16,115,000	16,189,000
Operating leases	5,501,000	5,046,000	4,780,000
Loss (gain) on disposals		(13,603,000)	0
Expenses related to customer bankruptcy		0	0
Vessel impairments		0	0
Total operating expenses	232,084,000	202,524,000	228,281,000
Operating earnings	34,822,000	34,532,000	22,325,000
Other expenses (income):
Interest expense and amortization of deferred financing fees	8,514,000	7,795,000	7,583,000
Interest income	(429,000)	(412,000)	(179,000)
Refinancing expenses			0
Acquisition related gain on contract settlement	(2,430,000)
Change in fair value of financial instruments	91,000	737,000	502,000
Equity income on consolidated subsidiaries	(68,582,000)
Equity income on investment (note 7)	(1,216,000)	(12,761,000)	(5,500,000)
Other expense (income)	797,000	497,000	578,000
Total other expenses (income)	(63,255,000)	(4,144,000)	2,984,000
Net earnings (loss)	98,077,000	38,676,000	19,341,000
Non-Guarantors [Member]
Condensed Income Statements Captions [Line Items]
Revenue	234,660,000	45,086,000	50,969,000
Operating expenses:
Ship operating	42,627,000	10,864,000	9,967,000
Cost of services, supervision fees		0	0
Depreciation and amortization	50,558,000	13,157,000	13,110,000
General and administrative	962,000	106,000	114,000
Operating leases	13,238,000	12,323,000	6,955,000
Loss (gain) on disposals		0	0
Expenses related to customer bankruptcy		541,000	12,390,000
Vessel impairments		0	0
Total operating expenses	107,385,000	36,991,000	42,536,000
Operating earnings	127,275,000	8,095,000	8,433,000
Other expenses (income):
Interest expense and amortization of deferred financing fees	54,200,000	10,832,000	11,290,000
Interest income	(301,000)	0	(3,000)
Refinancing expenses			0
Acquisition related gain on contract settlement	0
Change in fair value of financial instruments	139,000	0	0
Equity income on consolidated subsidiaries	0
Equity income on investment (note 7)	0	0	0
Other expense (income)	82,000	0	0
Total other expenses (income)	54,120,000	10,832,000	11,287,000
Net earnings (loss)	$ 73,155,000	$ (2,737,000)	$ (2,854,000)

Guarantor Financial Informati_5

Guarantor Financial Information - Consolidated Statements of Comprehensive Income (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Condensed Statement of Comprehensive Income [Line Items]
Net earnings (loss)	$ 278,798	$ 175,237	$ (139,039)
Amounts reclassified to net earnings during the year relating to cash flow hedging instruments	1,117	2,859	4,373
Comprehensive income (loss)	279,915	178,096	(134,666)
Eliminations [Member]
Condensed Statement of Comprehensive Income [Line Items]
Net earnings (loss)	(171,232)	(35,939)	(16,487)
Amounts reclassified to net earnings during the year relating to cash flow hedging instruments	0	0	0
Comprehensive income (loss)	(171,232)	(35,939)	(16,487)
Parent Issuer [Member]
Condensed Statement of Comprehensive Income [Line Items]
Net earnings (loss)	278,798	175,237	(139,039)
Amounts reclassified to net earnings during the year relating to cash flow hedging instruments	1,117	2,859	4,373
Comprehensive income (loss)	279,915	178,096	(134,666)
Guarantors [Member]
Condensed Statement of Comprehensive Income [Line Items]
Net earnings (loss)	98,077	38,676	19,341
Amounts reclassified to net earnings during the year relating to cash flow hedging instruments	0	0	0
Comprehensive income (loss)	98,077	38,676	19,341
Non-Guarantors [Member]
Condensed Statement of Comprehensive Income [Line Items]
Net earnings (loss)	73,155	(2,737)	(2,854)
Amounts reclassified to net earnings during the year relating to cash flow hedging instruments	0	0	0
Comprehensive income (loss)	$ 73,155	$ (2,737)	$ (2,854)

Guarantor Financial Informati_6

Guarantor Financial Information - Consolidated Statements of Cash Flows (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Condensed Cash Flow Statements Captions [Line Items]
Cash from (used in) operating activities	$ 483,851	$ 323,219	$ 311,087
Financing activities:
Common shares issued, net of issuance costs	0	118,966	95,978
Preferred shares issued, net of issuance costs	144,375	2,690	541,694
Draws on credit facilities	325,600	0	220,485
Repayment of credit facilities	(469,662)	(455,005)	(704,291)
2025 Notes and 2018 Warrants issued	250,000	0	0
Senior unsecured notes repurchased, including related expenses	(17,529)	(7,075)	0
Draws on long-term obligations under capital lease	46,964	176,254	180,750
Repayment of long-term obligations under capital lease	(48,140)	(26,198)	(24,733)
Senior unsecured notes issued	0	80,000	0
Common shares repurchased, including related expenses	0	0	(8,269)
Preferred shares redeemed, including related expenses	(143,430)	0	(333,074)
Proceeds from exercise of 2018 Warrants	250,000	0	0
Proceeds from sale-leaseback of vessels	0	90,753	354,000
Financing fees	(16,122)	(8,226)	(12,992)
Intercompany dividends paid	0
Dividends on common shares	(49,937)	(61,830)	(148,556)
Dividends on preferred shares	(65,765)	(64,416)	(54,085)
Advances from related parties		0
Cash from (used in) financing activities	206,354	(154,087)	106,907
Investing activities:
Expenditures for vessels	(318,740)	(338,518)	(343,552)
Short-term investments	(2,428)	307	3,004
Net proceeds from vessel disposals	0	37,091	12,078
Proceeds from sale of leased vessels	0	0	20,000
Other assets	(1,417)	(2,384)	(6,677)
Intercompany dividends received	0
Acquisition of GCI	(333,581)	0	0
Cash acquired from GCI	70,121	0	0
Loans to affiliate		19,648	49,735
Advances to related parties			0
Dividend recevied from subsidary			0
Capital contribution in subsidiary		0
Cash used in investing activities	(586,045)	(283,856)	(265,412)
Increase (decrease) in cash and cash equivalents	104,160	(114,724)	152,582
Cash and cash equivalents and restricted cash, beginning of year	267,236	381,960	229,378
Cash and cash equivalents and restricted cash, end of year	371,396	267,236	381,960
Eliminations [Member]
Condensed Cash Flow Statements Captions [Line Items]
Cash from (used in) operating activities	(35,000)	4,782	(36,421)
Financing activities:
Common shares issued, net of issuance costs	0	0	0
Preferred shares issued, net of issuance costs	0	0	0
Draws on credit facilities	0		0
Repayment of credit facilities	0	0	(1)
2025 Notes and 2018 Warrants issued	0
Senior unsecured notes repurchased, including related expenses	0	0
Draws on long-term obligations under capital lease	0	0	0
Repayment of long-term obligations under capital lease	0	0	(1)
Senior unsecured notes issued		0
Common shares repurchased, including related expenses			0
Preferred shares redeemed, including related expenses	0		0
Proceeds from exercise of 2018 Warrants	0
Proceeds from sale-leaseback of vessels		0	0
Financing fees	0	(2)	0
Intercompany dividends paid	36,100
Dividends on common shares	0	4,950	42,465
Dividends on preferred shares	0	0	0
Advances from related parties		(48,177)
Cash from (used in) financing activities	36,100	(43,229)	42,463
Investing activities:
Expenditures for vessels	0	0	0
Short-term investments	0	0	0
Net proceeds from vessel disposals		0	0
Proceeds from sale of leased vessels			0
Other assets	0	206	(6,042)
Intercompany dividends received	(1,100)
Acquisition of GCI	0
Cash acquired from GCI	0
Loans to affiliate		(4,950)	0
Advances to related parties			42,466
Dividend recevied from subsidary			(42,466)
Capital contribution in subsidiary		43,191
Cash used in investing activities	(1,100)	38,447	(6,042)
Increase (decrease) in cash and cash equivalents	0	0	0
Cash and cash equivalents and restricted cash, beginning of year	0	0	0
Cash and cash equivalents and restricted cash, end of year	0	0	0
Parent Issuer [Member]
Condensed Cash Flow Statements Captions [Line Items]
Cash from (used in) operating activities	223,936	315,803	268,780
Financing activities:
Common shares issued, net of issuance costs	0	118,966	95,978
Preferred shares issued, net of issuance costs	144,375	2,690	541,694
Draws on credit facilities	205,600		220,485
Repayment of credit facilities	(242,220)	(430,271)	(673,128)
2025 Notes and 2018 Warrants issued	250,000
Senior unsecured notes repurchased, including related expenses	(17,529)	(7,075)
Draws on long-term obligations under capital lease	46,964	176,254	180,750
Repayment of long-term obligations under capital lease	(30,504)	(9,649)	(9,182)
Senior unsecured notes issued		80,000
Common shares repurchased, including related expenses			(8,269)
Preferred shares redeemed, including related expenses	(143,430)		(333,074)
Proceeds from exercise of 2018 Warrants	250,000
Proceeds from sale-leaseback of vessels		90,753	354,000
Financing fees	(10,057)	(9,840)	(14,912)
Intercompany dividends paid	0
Dividends on common shares	(49,937)	(61,830)	(148,555)
Dividends on preferred shares	(65,765)	(64,416)	(54,085)
Advances from related parties		0
Cash from (used in) financing activities	337,497	(114,418)	151,702
Investing activities:
Expenditures for vessels	(157,268)	(329,328)	(324,962)
Short-term investments	0	0	7
Net proceeds from vessel disposals		0	12,078
Proceeds from sale of leased vessels			20,000
Other assets	891	2,782	3,678
Intercompany dividends received	1,100
Acquisition of GCI	(333,581)
Cash acquired from GCI	0
Loans to affiliate		27,376	49,735
Advances to related parties			(30,466)
Dividend recevied from subsidary			30,466
Capital contribution in subsidiary		(43,188)
Cash used in investing activities	(488,858)	(342,358)	(239,464)
Increase (decrease) in cash and cash equivalents	72,575	(140,973)	181,018
Cash and cash equivalents and restricted cash, beginning of year	146,328	287,301	106,283
Cash and cash equivalents and restricted cash, end of year	218,903	146,328	287,301
Guarantors [Member]
Condensed Cash Flow Statements Captions [Line Items]
Cash from (used in) operating activities	19,832	10,891	45,017
Financing activities:
Common shares issued, net of issuance costs	0	0	0
Preferred shares issued, net of issuance costs	0	0	0
Draws on credit facilities	0		0
Repayment of credit facilities	0	0	0
2025 Notes and 2018 Warrants issued	0
Senior unsecured notes repurchased, including related expenses	0	0
Draws on long-term obligations under capital lease	0	0	0
Repayment of long-term obligations under capital lease	(17,636)	(16,549)	(15,550)
Senior unsecured notes issued		0
Common shares repurchased, including related expenses			0
Preferred shares redeemed, including related expenses	0		0
Proceeds from exercise of 2018 Warrants	0
Proceeds from sale-leaseback of vessels		0	0
Financing fees	0	832	975
Intercompany dividends paid	(23,800)
Dividends on common shares	0	(4,950)	(23,100)
Dividends on preferred shares	0	0	0
Advances from related parties		6,667
Cash from (used in) financing activities	(41,436)	(14,000)	(37,675)
Investing activities:
Expenditures for vessels	(20,003)	(7,076)	(17,891)
Short-term investments	(1)	307	2,997
Net proceeds from vessel disposals		37,091	0
Proceeds from sale of leased vessels			0
Other assets	(4,078)	(5,365)	(4,896)
Intercompany dividends received	0
Acquisition of GCI	0
Cash acquired from GCI	0
Loans to affiliate		(2,778)	0
Advances to related parties			(12,000)
Dividend recevied from subsidary			12,000
Capital contribution in subsidiary		(3)
Cash used in investing activities	(24,082)	22,176	(19,790)
Increase (decrease) in cash and cash equivalents	(45,686)	19,067	(12,448)
Cash and cash equivalents and restricted cash, beginning of year	85,600	66,533	78,981
Cash and cash equivalents and restricted cash, end of year	39,914	85,600	66,533
Non-Guarantors [Member]
Condensed Cash Flow Statements Captions [Line Items]
Cash from (used in) operating activities	275,083	(8,257)	33,711
Financing activities:
Common shares issued, net of issuance costs	0	0	0
Preferred shares issued, net of issuance costs	0	0	0
Draws on credit facilities	120,000		0
Repayment of credit facilities	(227,442)	(24,734)	(31,162)
2025 Notes and 2018 Warrants issued	0
Senior unsecured notes repurchased, including related expenses	0	0
Draws on long-term obligations under capital lease	0	0	0
Repayment of long-term obligations under capital lease	0	0	0
Senior unsecured notes issued		0
Common shares repurchased, including related expenses			0
Preferred shares redeemed, including related expenses	0		0
Proceeds from exercise of 2018 Warrants	0
Proceeds from sale-leaseback of vessels		0	0
Financing fees	(6,065)	784	945
Intercompany dividends paid	(12,300)
Dividends on common shares	0	0	(19,366)
Dividends on preferred shares	0	0	0
Advances from related parties		41,510
Cash from (used in) financing activities	(125,807)	17,560	(49,583)
Investing activities:
Expenditures for vessels	(141,469)	(2,114)	(699)
Short-term investments	(2,427)	0	0
Net proceeds from vessel disposals		0	0
Proceeds from sale of leased vessels			0
Other assets	1,770	(7)	583
Intercompany dividends received	0
Acquisition of GCI	0
Cash acquired from GCI	70,121
Loans to affiliate		0	0
Advances to related parties			0
Dividend recevied from subsidary			0
Capital contribution in subsidiary		0
Cash used in investing activities	(72,005)	(2,121)	(116)
Increase (decrease) in cash and cash equivalents	77,271	7,182	(15,988)
Cash and cash equivalents and restricted cash, beginning of year	35,308	28,126	44,114
Cash and cash equivalents and restricted cash, end of year	$ 112,579	$ 35,308	$ 28,126

Subsequent events - Additional

Subsequent events - Additional Information (Detail)	Jan. 16, 2019USD ($)Vessel	Jan. 15, 2019USD ($)$ / sharesshares	Jan. 04, 2019USD ($)$ / shares	May 31, 2018USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Jul. 16, 2018$ / sharesshares	Mar. 31, 2018shares	Mar. 13, 2018$ / shares	Feb. 14, 2018shares
Subsequent Event [Line Items]
Dividends on preferred shares | $					$ 68,712,000	$ 64,416,000	$ 53,630,000
Proceeds from warrant exercises | $					$ 250,000,000	$ 0	$ 0
Fairfax Financial Holdings Limited [Member]
Subsequent Event [Line Items]
Warrants outstanding | shares											38,461,539
Proceeds from warrant exercises | $				$ 500,000,000
Class A Common Shares [Member] | Fairfax Financial Holdings Limited [Member]
Subsequent Event [Line Items]
Warrants outstanding | shares								25,000,000
Warrants exercise price								$ 8.05
Class A Common Shares [Member] | 2019 Warrants [Member] | Fairfax Financial Holdings Limited [Member]
Subsequent Event [Line Items]
Warrants outstanding | shares									38,461,539
Warrants exercise price										$ 6.50
Subsequent Events [Member]
Subsequent Event [Line Items]
Dividends declared date			Jan. 4, 2019
Dividends date of record			Jan. 14, 2019
Dividends date paid			Jan. 30, 2019
Dividends on common share, per share			$ 0.125
Subsequent Events [Member] | Revolving Credit Facilities [Member]
Subsequent Event [Line Items]
Repayments of debt | $	$ 147,000,000
Number of vessels in process of becoming unencumbered | Vessel	8
Subsequent Events [Member] | Fairfax Financial Holdings Limited [Member]
Subsequent Event [Line Items]
Reclassification of long-term debt to current liabilities puttable in period.		1 year
Debt redemption terms		As the right to call for early redemption of the Fairfax Notes is solely within the control of Fairfax, the Fairfax Notes will be reclassified from long-term debt to current liabilities when they become puttable within one year from period end.
Subsequent Events [Member] | 2019 Warrants [Member]
Subsequent Event [Line Items]
Warrants outstanding | shares		38,461,539
Subsequent Events [Member] | 2019 Warrants [Member] | Fairfax Financial Holdings Limited [Member]
Subsequent Event [Line Items]
Proceeds from warrant exercises | $		$ 250,000,000
Subsequent Events [Member] | 2026 Notes [Member]
Subsequent Event [Line Items]
Face value of debt | $		$ 250,000,000
Subsequent Events [Member] | Series D, Series E, Series G and Series H Preferred Share [Member]
Subsequent Event [Line Items]
Dividends on preferred shares | $			$ 17,719,000
Subsequent Events [Member] | Series D Preferred Shares [Member]
Subsequent Event [Line Items]
Dividends declared date			Jan. 4, 2019
Dividends on preferred shares, per share			$ 0.496875
Dividends date of record			Jan. 29, 2019
Dividends date paid			Jan. 30, 2019
Subsequent Events [Member] | Series E Preferred Shares [Member]
Subsequent Event [Line Items]
Dividends declared date			Jan. 4, 2019
Dividends on preferred shares, per share			$ 0.515625
Dividends date of record			Jan. 29, 2019
Dividends date paid			Jan. 30, 2019
Subsequent Events [Member] | Series G Preferred Shares [Member]
Subsequent Event [Line Items]
Dividends declared date			Jan. 4, 2019
Dividends on preferred shares, per share			$ 0.512500
Dividends date of record			Jan. 29, 2019
Dividends date paid			Jan. 30, 2019
Subsequent Events [Member] | Series H Preferred Shares [Member]
Subsequent Event [Line Items]
Dividends declared date			Jan. 4, 2019
Dividends on preferred shares, per share			$ 0.492188
Dividends date of record			Jan. 29, 2019
Dividends date paid			Jan. 30, 2019
Subsequent Events [Member] | Series I Preferred Stock [Member]
Subsequent Event [Line Items]
Dividends declared date			Jan. 4, 2019
Dividends on preferred shares, per share			$ 0.500000
Dividends date of record			Jan. 29, 2019
Dividends date paid			Jan. 30, 2019
Subsequent Events [Member] | Class A Common Shares [Member] | Fairfax Financial Holdings Limited [Member]
Subsequent Event [Line Items]
Warrants exercise price		$ 6.50
Subsequent Events [Member] | Class A Common Shares [Member] | 2019 Warrants [Member]
Subsequent Event [Line Items]
Warrants outstanding | shares		38,461,539
Warrants exercise price		$ 6.50