Fair Value Measurements (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Carrying Value (Balance Sheet) [Member]
Fixed-rate debt outstanding [abstract]
Fixed-rate debt	$ 1,260	$ 1,544
Fair Value [Member]
Fixed-rate debt outstanding [abstract]
Fixed-rate debt	1,275	1,615
Recurring [Member]
Financial liability recorded at fair value on a recurring basis [Abstract]
Derivative financial instrument	219	572
Recurring [Member] \| Level 1 [Member]
Financial liability recorded at fair value on a recurring basis [Abstract]
Derivative financial instrument	0	0
Recurring [Member] \| Level 2 [Member]
Financial liability recorded at fair value on a recurring basis [Abstract]
Derivative financial instrument	219	572
Recurring [Member] \| Level 3 [Member]
Financial liability recorded at fair value on a recurring basis [Abstract]
Derivative financial instrument	$ 0	$ 0

Derivative instrument obligations meeting the definition of a liability which the Company is a party to as of the balance sheet date.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 15

-Paragraph 83

-URI http://asc.fasb.org/extlink&oid=6913464&loc=d3e34841-113949

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 10

-Subparagraph i

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 6

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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