Percentage points added to the reference rate to compute the variable rate on the debt instrument.

No definition available.

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
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- Definition

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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- Definition

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 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

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-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

The average effective interest rate during the reporting period.

+ References

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

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

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-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

+ Details

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Period Type:	duration

- Definition

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

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

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(a)(1))

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

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	na
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- Details

Name:	us-gaap_DebtInstrumentLineItems
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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 470

-Section 50

-Paragraph 3

-Subparagraph e

-URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 1A

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399

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-Topic 835

-SubTopic 30

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+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

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 210.5-02.19(b),22(b))

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-Number 210

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Period Type:	instant

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

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- Definition

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 7

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-Paragraph 1

-Subparagraph (SX 210.5-02.22)

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-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

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-Paragraph 1

-Subparagraph (SX 210.9-03.16)

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-Name Regulation S-X (SX)

-Number 210

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-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

Represents the issue price of the debt instrument as a percentage of its face value.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
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Period Type:	duration

- Definition

Represents the LIBOR floor.

+ References

No definition available.

+ Details

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Debt Obligations (Details) (USD $)			6 Months Ended			0 Months Ended	6 Months Ended								0 Months Ended	6 Months Ended			0 Months Ended	6 Months Ended
Debt Obligations (Details) (USD $)	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2013 Senior secured term notes due 2017	Dec. 31, 2012 Senior secured term notes due 2017	Jun. 30, 2012 Senior secured term notes due 2017	Aug. 07, 2013 Senior secured term notes due 2017 Subsequent events	Jun. 30, 2013 Senior secured term notes due 2017 Year 1	Jun. 30, 2013 Senior secured term notes due 2017 Year 2	Jun. 30, 2013 Senior secured term notes due 2017 Year 3 and thereafter	Jun. 30, 2013 Senior secured term notes due 2017 LIBOR	Jun. 30, 2013 Senior secured term notes due 2017 Secured revolving credit facility Minimum	Jun. 30, 2013 Senior secured term notes due 2017 Secured revolving credit facility Maximum	Jun. 30, 2013 Senior secured term notes due 2017 Term loan	Feb. 28, 2013 $10.0 million secured revolving credit facility due 2018	Feb. 28, 2013 Revolver Phase	Jun. 30, 2013 Revolver Phase	Jun. 30, 2013 Revolver Phase Prime rate	Jun. 30, 2013 Revolver Phase Prime rate Minimum	Feb. 28, 2013 Term Phase	Jun. 30, 2013 Term Phase U.S. Treasury Bond for a term of five years	Jun. 30, 2013 Term Phase U.S. Treasury Bond for a term of five years Minimum	Feb. 28, 2013 Term Phase Letters of credit	Aug. 07, 2013 6.875% senior notes Subsequent events
Debt obligations
Debt obligations	$ 122,936,000	$ 122,729,000	$ 122,936,000	$ 122,729,000
Maximum borrowings capacity											25,000,000	40,000,000	25,000,000	10,000,000								5,000,000
Term Of loan															36 months				24 months
Variable rate basis										LIBOR							Prime Rate			U.S. Treasury Bond for a term of five years
Variable rate basis floor (as a percent)										2.00%
Base rate margin (as a percent)										8.00%							1.00%			3.00%
Interest on outstanding borrowings (as a percent)																		4.00%			5.00%
Non-use fee based on average unfunded portion of loan (as a percent)																0.25%
Amount drawn																0
Notes issued					125,000,000	125,000,000																	200,000,000
Redemption price (as a percent)						101.00%	102.00%	101.00%	100.00%
Issue price as percentage of par value			98.00%
Unamortized discount			$ 2,100,000	$ 2,300,000
Interest rate (as a percent)																							6.875%