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

Reference 1: 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

Reference 2: 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=6584090&loc=d3e28878-108400

+ Details

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

- Definition

Amount borrowed under the credit facility as of the balance sheet date.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

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

- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 15

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	credit
Period Type:	duration

- Details

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Subsequent Events (Narrative) (Details) (USD $)	6 Months Ended			6 Months Ended		0 Months Ended	6 Months Ended
Subsequent Events (Narrative) (Details) (USD $)	Jun. 30, 2013	Jun. 30, 2012	Apr. 26, 2012 Secured Syndicated Credit Facility [Member] Citi Bank [Member]	Jun. 30, 2013 Secured Term Loan [Member] Secured Syndicated Credit Facility [Member] Citi Bank [Member]	Apr. 26, 2012 Secured Term Loan [Member] Secured Syndicated Credit Facility [Member] Citi Bank [Member]	Jul. 30, 2013 Revolving Credit Facility [Member] Secured Syndicated Credit Facility [Member] Citi Bank [Member]	Jun. 30, 2013 Revolving Credit Facility [Member] Secured Syndicated Credit Facility [Member] Citi Bank [Member]	Aug. 07, 2013 Revolving Credit Facility [Member] Secured Syndicated Credit Facility [Member] Citi Bank [Member]
Subsequent Event [Line Items]
Principal payments of debt obligations	$ (624,000)	$ (600,000)		$ (4,100,000)		$ (5,000,000)	$ (5,000,000)
Debt instrument, face amount			100,000,000		45,000,000
Credit agreement, amount outstanding							$ 32,800,000	$ 27,800,000