Summary of Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014	Sep. 26, 2014
Summary of Investment Holdings [Line Items]
Stock dividend paid to company stockholders			5.00%
Fair market value of embedded derivatives at the midpoint of the inputs	$ 156,783	$ 169,386
Minimum [Member]
Summary of Investment Holdings [Line Items]
Fair market value of embedded derivatives at the midpoint of the inputs	155,272	167,593
Maximum [Member]
Summary of Investment Holdings [Line Items]
Fair market value of embedded derivatives at the midpoint of the inputs	$ 158,324	$ 171,215