Basis of Presentation and Accounting Policy (Tables)

9 Months Ended

Sep. 30, 2012

Nature Of Operations And Accounting Policies [Abstract]

Deferred Revenues Included In Other Current Liabilities

Deferred revenues, included in other current liabilities, for the nine months ended September 30 were as follows (in thousands):

	2012			2011
Balance at beginning of period	$	9,968		$	21,045
Revenues deferred during the period	21,794			6,518
Revenues recognized during the period	(14,975		)	(13,313		)
Write-off of previously deferred revenues	—			(16		)
Balance at end of period	$	16,787		$	14,234