Derivative Financial Instruments (Details 2) (USD $)	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended		1 Months Ended	3 Months Ended	9 Months Ended			3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013 Reclassification	Sep. 30, 2012 Reclassification	Sep. 30, 2013 Reclassification	Sep. 30, 2012 Reclassification	Sep. 30, 2012 Gain (loss) for cash flow hedges Reclassification	Sep. 30, 2013 Gain (loss) for cash flow hedges Reclassification	Sep. 30, 2012 Gain (loss) for cash flow hedges Reclassification	Jan. 31, 2013 Cash flow hedges	Sep. 30, 2012 Cross currency interest rate Gain (loss) for cash flow hedges Reclassification	Sep. 30, 2013 Cross currency interest rate Gain (loss) for cash flow hedges Reclassification	Sep. 30, 2012 Cross currency interest rate Gain (loss) for cash flow hedges Reclassification	Sep. 30, 2012 Cross currency interest rate Cash flow hedges	Sep. 30, 2012 Cross currency interest rate Other Revenues - Other Gain (loss) for cash flow hedges Reclassification	Sep. 30, 2012 Cross currency interest rate Other Revenues - Other Gain (loss) for cash flow hedges Reclassification	Sep. 30, 2012 Cross currency interest rate Interest Expense Gain (loss) for cash flow hedges Reclassification	Sep. 30, 2013 Cross currency interest rate Interest Expense Gain (loss) for cash flow hedges Reclassification	Sep. 30, 2012 Cross currency interest rate Interest Expense Gain (loss) for cash flow hedges Reclassification
Amount of gain (loss) recognized
AOCI(L)																$ (16,987,000)
From AOCI(L) to Earnings																	293,000	(12,453,000)
From AOCI(L) to Earnings																			899,000	160,000	975,000
Net income (loss)	(91,395,000)	(49,973,000)	(73,686,000)	(141,178,000)	6,000	384,000	1,427,000	(8,084,000)	774,000	104,000	(7,461,000)		1,192,000	160,000	(11,478,000)
Recognized in Other Revenues - Other																(426,000)
Deferred net gain on cash flow hedges reclassified from accumulated other comprehensive income to earnings												$ 200,000