Other Assets (Tables)

12 Months Ended

Dec. 31, 2012

Other Assets [Abstract]

Schedule Of Other Assets

Other assets consist of the following at December 31:

	2012							2011							Weighted Average Life
	Cost		Accumulated Amortization			Net		Cost		Accumulated Amortization			Net
Intangible assets:
Technology licenses	$	44,548	$	(41,413	)	$	3,135	$	44,827	$	(40,860	)	$	3,967	12
Patents	6,503		(3,956		)	2,547		6,503		(3,306		)	3,197		10
Customer relationships	17,649		(8,259		)	9,390		17,649		(6,901		)	10,748		13
Goodwill	29,990		—			29,990		29,990		—			29,990
Other	3,230		—			3,230		1,161		—			1,161
Total intangible assets	101,920		(53,628		)	48,292		100,130		(51,067		)	49,063
Available-for-sale investments	—		—			—		30,113		—			30,113
Notes receivable from affiliate	1,192		—			1,192		2,383		—			2,383
Turnaround costs	83,726		(54,666		)	29,060		86,728		(57,175		)	29,553		5
Debt issuance costs	19,219		(8,149		)	11,070		20,628		(8,989		)	11,639		13
Other, net	27,736		(10,351		)	17,385		22,502		(9,678		)	12,824		4
Other assets, net	$	233,793	$	(126,794	)	$	106,999	$	262,484	$	(126,909	)	$	135,575

Schedule of Realized Gains on Available-for-sale Equity Securities

The proceeds from sales of available-for-sale equity securities and the gross realized gains included in the consolidated statements of operations are reflected in the table below. The cost of securities sold was determined using the specific identification method.

	Year Ended December 31,
	2012
Proceeds from sales of available-for-sale equity securities	$	47,655
Gross realized gains	$	16,429

Available-For-Sale Investments

The cost, gross unrealized gains, gross unrealized losses and fair value of the Company's available-for-sale investments at December 31, 2011 were as follows:

	December 31, 2011
	Cost		Gross Unrealized Gains		Gross Unrealized Losses (1)			Fair Value
Available-for-sale equity securities	$	28,265	$	1,981	$	(133	)	$	30,113

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(1) All unrealized loss positions were held at a loss for less than 12 months.