Debt (Tables)

3 Months Ended

Mar. 31, 2012

Debt [Abstract]

Summary Of Credit Facilities And Related Information

	March 31, 2012		December 31, 2011
Letters of credit outstanding	$	4,535	$	4,785
Borrowings		—		—
	Three Months Ended March 31,
	2012		2011
Interest expense (including commitment and letter of credit fees)	$	322	$	321
Amortization of issuance costs	$	181	$	181