Debt Debt (Schedule of Debt) (Captions) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Debt Instrument, Unamortized Discount	$ (2,497)
Debt Instrument, Name, Q3 2014 HUD Mortgages [Member]
Debt Instrument [Line Items]
Debt Instrument, Unamortized Discount	(1,299)	$ (1,320)
Debt Instrument, Name, Convertible Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Unamortized Discount	$ (1,199)	$ (1,391)

Amount, after accumulated amortization, of debt discount.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28541-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

Name:	us-gaap_DebtInstrumentUnamortizedDiscount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant