Property, plant and equipment

12 Months Ended

Dec. 31, 2012

6. Property, plant and equipment

	2012			2011			Depreciable Lives

Land	$	7,349		$	8,868
Office equipment, machinery and other		2,931			7,633		3 - 10 years
Leasehold improvements		433			3,413		7 - 15 years
Asset retirement obligation		35,846			31,769		1 - 42 years
Plant in service		1,901,062			1,285,131		1 - 45 years
Construction in progress		193,683			170,475		—

		2,142,304			1,507,289
Foreign currency translation adjustment		(6,627	)		(2,748	)
Less accumulated depreciation		(79,167	)		(116,287	)

	$	2,055,510		$	1,388,254

Depreciation expense of $58.6 million, $13.2 million and $0.1 million was recorded for the years ended December 31, 2012, 2011 and 2010, respectively.

- Definition

The entire disclosure for long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. This disclosure may include property plant and equipment accounting policies and methodology, a schedule of property, plant and equipment gross, additions, deletions, transfers and other changes, depreciation, depletion and amortization expense, net, accumulated depreciation, depletion and amortization expense and useful lives, income statement disclosures, assets held for sale and public utility disclosures.

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