v2.4.0.6
Derivative Instruments (Narrative) (Details) (USD $)
 12 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2012
NAB Australian Corporate Credit Facility [Member]
Oct. 31, 2012
US GE Capital Term Loan [Member]
Dec. 31, 2011
US GE Capital Term Loan [Member]
Dec. 31, 2012
US Bank Of America Revolver [Member]
Derivative [Line Items]              
Minimum swap percentage       75.00%      
Interest rate swap term       5 years      
Percentage of variable interest debt converted to fixed rate       100.00%      
Swap contract rate       5.50%     1.44%
Interest rate swap, amount in-the-money       $ 160,000      
Increase (decrease) in derivative fixed interest rate       (0.05%)     0.10%
Note payable 196,597,000 209,614,000     27,700,000 32,188,000 30,000,000
Interest rate swap 5,855,000 4,722,000         29,100,000
Fixed interest rate       8.15%     5.84%
Fixed interest rate margin       2.65%     4.50%
Interest rate       5.82%     3.21%
Increase (decrease) in interest expense from derivatives $ 1,100,000 $ 5,000,000 $ (284,000)