Fair Value Measurements (Level 3 Valuation Techniques) (Details) (USD $) In Thousands, unless otherwise specified								6 Months Ended
	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Jun. 30, 2014 Income Approach Valuation Technique [Member]	Jun. 30, 2014 Income Approach Valuation Technique [Member] Minimum [Member] Rate	Jun. 30, 2014 Income Approach Valuation Technique [Member] Maximum [Member] Rate
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs	$ (39,116)	$ (6,097)	$ 6,709	$ 3,096	$ 0	$ 0	$ (39,116)
Expected Volatility Rate								13.60%	19.70%