Summary of Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016	Sep. 29, 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	$ 95,627	$ 112,332
Minimum
Embedded Derivative [Line Items]
Fair market value of embedded derivatives at the midpoint of the inputs	95,256	111,653
Maximum
Embedded Derivative [Line Items]
Fair market value of embedded derivatives at the midpoint of the inputs	$ 96,300	$ 113,090