Accounting Policies (Details 1) - USD ($)	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Schedule of Changes in Accumulated Other Comprehensive Income [Line Items]
Balance, beginning	$ (58,846,000)	$ (76,582,000)
Gain (loss) recognized in accumulated OCI	(9,495,000)	(6,187,000)
Loss reclassified from accumulated OCI	18,382,000	21,461,000
Total other comprehensive income	8,887,000	15,274,000
Balance, ending	(49,959,000)	(61,308,000)
Foreign Currency Translation
Schedule of Changes in Accumulated Other Comprehensive Income [Line Items]
Balance, beginning	(84,000)	(116,000)
Gain (loss) recognized in accumulated OCI	29,000	48,000
Loss reclassified from accumulated OCI	0	0
Total other comprehensive income	29,000	48,000
Balance, ending	(55,000)	(68,000)
Interest Rate Contracts
Schedule of Changes in Accumulated Other Comprehensive Income [Line Items]
Balance, beginning	(58,762,000)	(76,466,000)
Gain (loss) recognized in accumulated OCI	(9,524,000)	(6,235,000)
Loss reclassified from accumulated OCI	18,382,000	21,461,000
Total other comprehensive income	8,858,000	15,226,000
Balance, ending	$ (49,904,000)	$ (61,240,000)