Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2013

Fair Value Disclosures [Abstract]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

The Company’s financial assets and liabilities as of June 30, 2013 that are measured at fair value on a recurring basis were as follows (in thousands):

	Level 1		Level 2		Level 3
ASSETS
Marketable securities(1)	$	27,264	$	—	$	—
Derivative instruments (included in other receivables)	820		5,961		—
Construction reserve funds and Title XI reserve funds	150,375		—		—
LIABILITIES
Short sale of marketable securities (included in other current liabilities)	7,809		—		—
Derivative instruments (included in other current liabilities)	703		4,770		—

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(1) Marketable security gains, net include unrealized gains of $6.5 million and unrealized losses of $2.0 million for the three months ended June 30, 2013 and 2012, respectively, related to marketable security positions held by the Company as of June 30, 2013.

Estimated Fair Value Of Other Financial Assets And Liabilities

The estimated fair values of the Company’s other financial assets and liabilities as of June 30, 2013 were as follows (in thousands):

			Estimated Fair Value
	Carrying Amount		Level 1		Level 2		Level 3
ASSETS
Cash, cash equivalents and restricted cash	$	411,559	$	411,559	$	—	$	—
Investments, at cost, in 50% or less owned companies (included in other   assets)	9,315		see below
Notes receivable from other business ventures (included in other   receivables and other assets)	21,674		see below
LIABILITIES
Long-term debt, including current portion(1)	699,553		—		813,568		—

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(1) The estimated fair value includes the conversion option on the Company's 2.5% Convertible Notes.

Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Table Text Block]

The Company’s non-financial assets and liabilities that were measured at fair value during the six months ended June 30, 2013 were as follows (in thousands):

	Level 1		Level 2		Level 3
ASSETS
Long-lived assets under construction(1)	$	17,494	$	—	$	—
Investment in C-Lift LLC(2)	—		13,290		—

______________________

(1) During the six months ended June 30, 2013, the Company recognized impairment charges of $3.0 million related to two of Shipping Services' harbor tugs while under construction, which were sold and leased back upon their completion (see Note 5).

(2) During the six months ended June 30, 2013, the Company marked its equity investment in C-Lift LLC ("C-Lift") to fair value following its acquisition of a controlling interest (see Note 4). The investment's fair value was determined based on the Company's purchase price of the acquired interest.