Fair Value of Financial Instruments (Narrative) (Details) - USD ($)	Sep. 30, 2016	Dec. 31, 2015
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Liabilities	$ 293,407,000	$ 301,785,000
Level 2 [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Liabilities	293,285,000	301,525,000
Level 2 [Member] \| Secured Notes One [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Secured notes	120,000,000
Level 2 [Member] \| Secured Notes Two [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Secured notes	20,000,000
Options Sold [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Liabilities	$ 122,000	$ 260,000

Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: 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))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Name:	us-gaap_SecuredDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant