Fair values as of the balance sheet date of all liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments, and which are expected to be extinguished or otherwise disposed of after one year or beyond the normal operating cycle, if longer, net of the effects of master netting arrangements.

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+ Details

Derivative Instruments (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended
Derivative Instruments (Narrative) (Details) (USD $)	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Derivative Instruments [Line Items]
Increase (decrease) in interest expense from derivatives	$ 351,000	$ 2,900,000	$ 1,800,000	$ 4,600,000
Interest rate swap	$ 6,570,000		$ 6,570,000		$ 4,722,000
NAB Australian Corporate Credit Facility [Member]
Derivative Instruments [Line Items]
Minimum swap percentage			75.00%
Minimum years for drawdowns on swap			5 years
Percentage of variable interest debt converted to fixed rate			100.00%
Pay Fixed Rate			5.50%
US GE Capital Term Loan [Member]
Derivative Instruments [Line Items]
Minimum swap percentage			50.00%
Minimum years for drawdowns on swap			3 years
Percentage of variable interest debt converted to fixed rate			100.00%
Pay Fixed Rate			5.84%