Debt (Summary Of Credit Facilities And Related Information) (Detail) (USD $) In Thousands, unless otherwise specified			3 Months Ended		9 Months Ended
	Dec. 31, 2011	Sep. 30, 2012 Liabilities Held For Sale [Member]	Sep. 30, 2012 Discontinued Operations [Member]	Sep. 30, 2011 Discontinued Operations [Member]	Sep. 30, 2012 Discontinued Operations [Member]	Sep. 30, 2011 Discontinued Operations [Member]
Line of Credit Facility [Line Items]
Letters of credit outstanding	$ 4,785	$ 4,206
Borrowings
Interest rate on revolver borrowings
Interest expense (including commitment and letter of credit fees)			455	328	1,163	974
Amortization of issuance costs			$ 181	$ 182	$ 544	$ 544