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Capital Notes (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Jan. 25, 2017	Sep. 30, 2012
Debt Instrument [Line Items]
Duration of written notice to holders	30 days
2012 Notes [Member]
Debt Instrument [Line Items]
Capital notes issued			$ 10,000,000
Debt instrument, interest rate, stated percentage	6.00%
Debt instrument, maturity date	Apr. 01, 2017
2017 Notes [Member]
Debt Instrument [Line Items]
Debt instrument, maturity date	Jan. 24, 2022
2017 Notes [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Capital notes issued		$ 5,000,000
Debt instrument, interest rate, stated percentage		4.00%

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Duration Of Financials Sole Discretion Written Notice

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Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

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Contractual interest rate for funds borrowed, under the debt agreement.

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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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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(2))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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