Equipment Acquisitions, Dispositions and Depreciation and Impairment Policies (Tables)

9 Months Ended

Sep. 30, 2014

Equipment Acquisitions, Dispositions And Depreciation And Impairment Policies [Abstract]

Schedule Of Deferred Gain Activity

Deferred gain activity related to these transactions for the nine months ended September 30 was as follows (in thousands):

	2014			2013
Balance at beginning of period	$	124,763		$	111,514
Adjustments to deferred gains arising from asset sales	53,832			14,609
Amortization of deferred gains included in operating expenses as a reduction to rental expense	(12,196		)	(7,707		)
Amortization of deferred gains included in gains on asset dispositions and impairments, net	(3,484		)	(2,146		)
Balance at end of period	$	162,915		$	116,270

Schedule of Estimated Useful Life of Newly Acquired Equipment

As of September 30, 2014, the estimated useful life (in years) of each of the Company’s major categories of new equipment was as follows:

Offshore support vessels (excluding wind farm utility)	20
Wind farm utility vessels	10
Inland river dry-cargo and deck barges	20
Inland river liquid tank barges	25
Inland river towboats	25
U.S.-flag product tankers	25
Short-sea Container/RORO(1) vessels	20
Harbor tugs	25
Ocean liquid tank barges	25
Terminal and manufacturing facilities	20

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(1) Roll on/Roll off ("RORO").