Summary Of Significant Accounting Policies (Other Intangible Amortization) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Finite-Lived Intangible Assets [Line Items]
Other intangible amortization	$ 2,436	$ 1,145	$ 7,091	$ 3,298