Derivative Financial Instruments Foreign Currency Exchange Rate Risk (Details)	12 Months Ended					12 Months Ended			3 Months Ended			12 Months Ended
	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2011 USD ($)	Dec. 03, 2012 The New Swap [Member] USD ($)	Dec. 03, 2012 The New Swap [Member] AUD	Dec. 31, 2013 The New Swap [Member] Not Designated as Hedging Instrument [Member] USD ($)	Dec. 31, 2012 The New Swap [Member] Not Designated as Hedging Instrument [Member] USD ($)	Dec. 31, 2011 The New Swap [Member] Not Designated as Hedging Instrument [Member] USD ($)	Dec. 31, 2012 The New Swap [Member] AUD BBSW Interest Rate [Member]	Dec. 31, 2012 The New Swap [Member] LIBOR Interest Rate [Member]	Dec. 31, 2012 The Swap [Member] USD ($)	Dec. 31, 2012 The Swap [Member] USD ($)	Dec. 01, 2010 The Swap [Member] USD ($)	Dec. 01, 2010 The Swap [Member] AUD
Derivatives [Line Items]
Third party debt related to foreign operations denominated in foreign currencies	$ 142,100,000
Notional Amount				109,600,000	105,000,000								100,600,000	105,000,000
Interest (expense)/income						(2,696,000)	(4,638,000)	(5,935,000)				(4,400,000)
Other income, net	2,122,000	2,182,000	703,000			427,000	303,000	246,000				600,000
Derivative settlement payment											$ 9,100,000
Description of variable rate basis									Australian dollar BBSW plus 3.25%	LIBOR plus 2.82%