Shipbuilding Contracts (Detail) $ in Millions |
1 Months Ended | ||||
|---|---|---|---|---|---|
|
Feb. 15, 2016
USD ($)
|
Apr. 30, 2013
vessel
contract
DWT
|
Mar. 31, 2016
USD ($)
|
Nov. 30, 2014
USD ($)
|
Nov. 30, 2013
vessel
|
|
| Property, Plant and Equipment [Line Items] | |||||
| Number of special purpose subsidiaries | 4 | ||||
| STX [Member] | |||||
| Property, Plant and Equipment [Line Items] | |||||
| Weight capacity in dead-weight tonne | DWT | 113,000.000 | ||||
| Number of shipbuilding contracts | contract | 4 | ||||
| Litigation settlement amount | $ | $ 32.4 | ||||
| Orders to Construct Newbuildings [Member] | STX [Member] | |||||
| Property, Plant and Equipment [Line Items] | |||||
| Number of vessels | 4 | ||||
| Additional Order Option Maximum [Member] | STX [Member] | |||||
| Property, Plant and Equipment [Line Items] | |||||
| Number of vessels | 12 | ||||
| Option To Order Exercised [Member] | STX [Member] | |||||
| Property, Plant and Equipment [Line Items] | |||||
| Number of vessels | 8 | ||||
| Cash and Cash Equivalents [Domain] | STX [Member] | |||||
| Property, Plant and Equipment [Line Items] | |||||
| Amount of escrow account placed | $ | $ 0.6 | $ 0.6 |