Risk Management and Use of Derivative Financial Instruments (Details 5) In Thousands, unless otherwise specified	Dec. 31, 2013 USD ($)	Dec. 31, 2013 Not Designated as Hedging Instrument Interest rate swap Euro USD ($) instrument	Dec. 31, 2013 Not Designated as Hedging Instrument Interest rate swap Euro EUR (€)	Dec. 31, 2013 Derivatives in Cash Flow Hedging Relationships Interest rate cap Euro USD ($) instrument	Dec. 31, 2013 Derivatives in Cash Flow Hedging Relationships Interest rate cap Euro EUR (€)	Dec. 31, 2013 Derivatives in Cash Flow Hedging Relationships Interest rate swap USD ($) instrument	Dec. 31, 2013 Derivatives in Cash Flow Hedging Relationships Interest rate swap Euro USD ($) instrument	Dec. 31, 2013 Derivatives in Cash Flow Hedging Relationships Interest rate swap Euro EUR (€)
Derivative Disclosure
Derivative number of instruments		3	3	1	1	5	2	2
Notional Amount			€ 109,959		€ 64,543	$ 72,240		€ 8,375
Fair value	$ (13,109)	$ (11,995)		$ 2		$ (24)	$ (1,092)