Summary of Significant Accounting Policies (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 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	$ 162,039	$ 169,386
Minimum [Member]
Summary of Investment Holdings [Line Items]
Fair market value of embedded derivatives at the midpoint of the inputs	160,400	167,593
Maximum [Member]
Summary of Investment Holdings [Line Items]
Fair market value of embedded derivatives at the midpoint of the inputs	$ 163,711	$ 171,215