Investments (Summary Of Other Equity Investments) (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Schedule of Equity Method Investments [Line Items]
Other Equity Investments	$ 68,670	$ 68,230
G5 [Member]
Schedule of Equity Method Investments [Line Items]
Other Equity Investments	19,498	20,595
ABS [Member]
Schedule of Equity Method Investments [Line Items]
Other Equity Investments	46,398	45,104
Pan [Member]
Schedule of Equity Method Investments [Line Items]
Other Equity Investments	$ 2,774	$ 2,531