Summary of Components Included in Reorganization Items (Parenthetical) (Detail) $ in Thousands	3 Months Ended
	Jun. 30, 2017 USD ($)
Reorganizations [Line Items]
Lessor claims - sale leaseback agreements	$ 323,600
Sale-leaseback contract termination, leasehold improvements to vessels	208,141	[1]
Sale-leaseback contract termination, remaining deferred gains	105,900
Sale leaseback contract termination, accrued liabilities associated with lease expense.	11,300
Term loan, revolving line of credit and senior notes
Reorganizations [Line Items]
Unamortized debt issuance costs	5,100
Stacked Vessels
Reorganizations [Line Items]
Sale-leaseback contract termination, leasehold improvements to vessels	1,700
Senior Notes
Reorganizations [Line Items]
Make-whole provision - Senior notes	$ 94,800

[1] Represents the lessors’ claims reserve of $323.6 million plus leasehold improvements to vessels underlying sale leaseback transactions of $1.7 million, partially offset by the recognition of remaining deferred gains of $105.9 million and accrued liabilities associated with the recognition of lease expense on a straight-line basis of $11.3 million.