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Term Loan and Revolving Credit Facility (Details Textual) (USD $)	3 Months Ended
	Mar. 31, 2013	Nov. 08, 2012
Term Loan and Revolving Credit Facility (Textual)
Debt	$ 124,219,000
Option to increase commitments under credit facility		50,000,000
Term loan facility, quarterly amortization payments, during 2013		781,250
Term loan facility, quarterly amortization payments, during 2014		781,250
Term loan facility, quarterly amortization payments, during 2015		1,562,500
Term loan facility, quarterly amortization payments, during 2016		1,562,500
Quarterly payment percentage of aggregate original principal amount of term loan facility in year one and two		0.625%
Quarterly payment percentage of aggregate original principal amount of term loan facility in year three and four		1.25%
Cash interest paid	1,100,000
Covenant terms required by credit facility	1) A total leverage ratio of not greater than 2.00:1.00; 2) A coverage ratio of not less than 1.75:1.00; 3) A Department of Education financial composite score of not less than 1.5.
Maximum total leverage ratio	2.00
Minimum coverage ratio	1.75
Minimum department of education financial composite score	1.5
Minimum [Member]
Term Loan and Revolving Credit Facility (Textual)
Unused commitment fee	0.30%
Term loan facility, effective percentage	2.85%
Maximum [Member]
Term Loan and Revolving Credit Facility (Textual)
Unused commitment fee	0.40%
Term loan facility, effective percentage	3.35%
Letter of Credit [Member]
Term Loan and Revolving Credit Facility (Textual)
Maximum borrowing on term loan facility		50,000,000
LIBOR [Member] | Minimum [Member]
Term Loan and Revolving Credit Facility (Textual)
Margin rate for interest if using base rate	2.00%
Interest rate swap, fixed rate	2.85%
LIBOR [Member] | Maximum [Member]
Term Loan and Revolving Credit Facility (Textual)
Margin rate for interest if using base rate	2.50%
Interest rate swap, fixed rate	3.35%
Revolving Credit Facility [Member]
Term Loan and Revolving Credit Facility (Textual)
Maximum borrowing on term loan facility		100,000,000
Term Loan Facility [Member]
Term Loan and Revolving Credit Facility (Textual)
Maximum borrowing on term loan facility		125,000,000
Debt		$ 124,219,000

X

- Definition

Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt.

+ References

No definition available.

+ Details

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X

- Definition

Maximum leverage ratio to be maintained under credit facility.

+ References

No definition available.

+ Details

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X

- Definition

Minimum coverage ratio to be maintained under credit facility.

+ References

No definition available.

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- Definition

Minimum Department of Education financial composite score to be maintained under credit facility.

+ References

No definition available.

+ Details

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X

- Definition

The additional amount by which the Company can increase its commitments under the Credit Facility, subject to obtaining additonal loan commitments and the satisfaction of certain conditions.

+ References

No definition available.

+ Details

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X

- Definition

The percentage of the aggregate original principal amount of the term loan facility that is paid quarterly in year one and two.

+ References

No definition available.

+ Details

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X

- Definition

The percentage of the aggregate original principal amount of the term loan facility that is paid quarterly in year three and four.

+ References

No definition available.

+ Details

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- Definition

Term Loan Facility, Quarterly Amortization Payments, year four.

+ References

No definition available.

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- Definition

Term Loan Facility, Quarterly Amortization Payments, year one.

+ References

No definition available.

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- Definition

Term Loan Facility, Quarterly Amortization Payments, year three.

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No definition available.

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- Definition

Term Loan Facility, Quarterly Amortization Payments, year two.

+ References

No definition available.

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- Definition

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

+ References

No definition available.

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- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ 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



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

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-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

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Fixed interest rate related to the interest rate derivative.

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The amount of cash paid for interest during the period.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4297-108586



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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 29

-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.



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-Name Accounting Standards Codification

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- Definition

Description of the conditions for borrowing under the credit facility including the nature of any restrictions.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 129

-Paragraph 2, 4

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

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



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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

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- 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 Statement of Financial Accounting Standard (FAS)

-Number 129

-Paragraph 2, 4

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

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



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- 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.

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