Note 3 - Vessel Acquisitions and Dispositions (Tables)

9 Months Ended

Sep. 30, 2014

Asset under Construction [Member]

Note 3 - Vessel Acquisitions and Dispositions (Tables) [Line Items]

Property, Plant and Equipment, Schedule of Significant Acquisitions and Disposals [Table Text Block]

Vessels Under Construction as of October 20, 2014
Construction Yard	Region	Type(1)	Expected Delivery	Length (feet)		BHP(2)		DWT(3)		Expected Cost
										(millions)
Thoma-Sea	Americas	LgPSV	Q1 2015		271		9,990		3,600	$	36
BAE Systems	Americas	LgPSV	Q2 2015		286		10,960		5,300	$	48
BAE Systems	Americas	LgPSV	Q3 2015		286		10,960		5,300	$	48
Simek	North Sea	LgPSV	Q4 2015		304		11,935		4,700	$	60

Additions [Member]

Note 3 - Vessel Acquisitions and Dispositions (Tables) [Line Items]

Property, Plant and Equipment, Schedule of Significant Acquisitions and Disposals [Table Text Block]

Vessel Additions Since December 31, 2013
Vessel	Region	Type(1)	Year Built	Length (feet)		BHP(2)		DWT(3)		Month Delivered/ Acquired
North Cruys	N. Sea	LgPSV	2014		304		11,935		4,700	Feb-14
Highland Princess	N. Sea	LgPSV	2014		246		8,487		3,900	Mar-14
Polaris	Americas	LgPSV	2014		271		9,990		3,600	Apr-14

Acquired [Member]

Note 3 - Vessel Acquisitions and Dispositions (Tables) [Line Items]

Property, Plant and Equipment, Schedule of Significant Acquisitions and Disposals [Table Text Block]

Vessels Acquired Since December 31, 2013
			Year	Length				Month
Vessel	Region	Type(1)	Built	(feet)		BHP(2)	DWT(3)	Aquired
Highland Duke	N. Sea	LgPSV	2012		246	7,483	3,133	Feb-14

Disposed [Member]

Note 3 - Vessel Acquisitions and Dispositions (Tables) [Line Items]

Property, Plant and Equipment, Schedule of Significant Acquisitions and Disposals [Table Text Block]

Vessels Disposed of Since December 31, 2013
			Year	Length				Month
Vessel	Region	Type(1)	Built	(feet)		BHP(2)	DWT(3)	Disposed
Highland Piper	SEA	LgPSV	1996		221	5,450	3,115	Jul-14
Highland Legend	SEA	PSV	1986		194	3,600	1,442	Sep-14