Fair Value Measurements (Details 1) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2014
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative Liability	$ 0	$ 1,283
Restricted Cash and Cash Equivalents	54,000	98,137
Cash and Cash Equivalents, at Carrying Value	656,247	155,904	$ 149,041	$ 169,656
Fair Value, Inputs, Level 1 [Member] | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative Liability	0	0
Estimate of Fair Value Measurement [Member] | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative Liability	$ 0	$ 1,283