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Subsequent Events Subsequent Events (Notes) | 9 Months Ended
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Sep. 30, 2017
Subsequent Event [Line Items] |
Subsequent Events [Text Block] | Subsequent Events The Company acquired the m/v Bulk Pride on October 11, 2017 through its new wholly owned subsidiary Bulk Pride Corp. The purchase price of the vessel, which is expected to be delivered in December 2017, was $13.8 million.

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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business. + References No definition available. + Details
Name: | us-gaap_SubsequentEventsTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration