Summary of Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Sep. 28, 2017	Dec. 31, 2016
Accounting Policies [Abstract]
Stock dividend paid to company stockholders		5.00%
Embedded Derivative [Line Items]
Fair market value of embedded derivatives at the midpoint of the inputs	$ 86,190		$ 112,332
Minimum
Embedded Derivative [Line Items]
Fair market value of embedded derivatives at the midpoint of the inputs	85,885		111,653
Maximum
Embedded Derivative [Line Items]
Fair market value of embedded derivatives at the midpoint of the inputs	$ 86,731		$ 113,090