Derivative Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2013

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Fair Value Of Derivative Instruments Included In Balance Sheets

	Liability Derivatives
	Balance Sheet Location	Fair Value
		March 31, 2013		December 31, 2012
Derivatives designated as hedging instruments:
Interest rate swap contracts	Other liabilities	$	11,546	$	13,398
Derivatives not designated as hedging instruments:
Interest rate swap contracts	Other liabilities	8,021		8,739
Total derivatives		$	19,567	$	22,137

Schedule Of Gains And Losses Related To Derivative Instruments

	Amount of Gain or (Loss) Recognized  in Other Comprehensive  Income (“OCI”) on Derivatives  (Effective Portion)						Location of Gain or (Loss) Reclassified from Accumulated OCI into Earnings  (Effective Portion)	Amount of Gain or (Loss) Reclassified  from Accumulated OCI into  Earnings (Effective Portion)(a)
	Three Months Ended March 31,							Three Months Ended March 31,
	2013			2012				2013		2012
Derivatives in cash flow hedging relationships:
Interest rate swap contracts	$	(59	)	$	(2,934	)	Interest expense	$	1,911	$	(2,114	)

(a) There were no gains or losses recognized in earnings related to any ineffective portion of the hedging relationship or related to any amount excluded from the assessment of hedge effectiveness for the three months ended March 31, 2013 and 2012.

Schedule of Other Derivatives Not Designated as Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block]

	Location of Gain or (Loss) Recognized in Earnings on Derivatives	Amount of Gain or (Loss) Recognized in Earnings on Derivatives
		Three Months Ended March 31,
		2013		2012
Derivatives not designated as hedging relationships:
Interest rate swap contracts	Interest expense	$	79	$	—