Long- Term Debt to Affiliated Trust Long-Term Debt to Affiliated Trust (Schedule of Distribution Rates Paid) (Details)	9 Months Ended	12 Months Ended
Sep. 30, 2015	Dec. 31, 2014
Long-Term Debt to Affiliated Trust [Abstract]
Interest Rate, minimum	1.11%	1.10%
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum	1.20%	1.11%

Maximum contractual interest rate for funds borrowed, under the debt agreement.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration