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Term Loan and Revolving Credit Facility (Details Textual) (USD $) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012 | Nov. 08, 2012
Term Loan and Revolving Credit Facility (Textual) |  |  |  |  |
Debt | $ 123,438,000 |  | $ 123,438,000 |  |
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 | 900,000 | 2,200,000 | 1,900,000 |
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 |  | 2.00 |  |
Minimum coverage ratio | 1.75 |  | 1.75 |  |
Minimum department of education financial composite score | 1.5 |  | 1.5 |  |
Minimum [Member] |  |  |  |  |
Term Loan and Revolving Credit Facility (Textual) |  |  |  |  |
Unused commitment fee |  |  | 0.30% |  |
Term loan facility, effective percentage | 2.85% |  | 2.85% |  |
Maximum [Member] |  |  |  |  |
Term Loan and Revolving Credit Facility (Textual) |  |  |  |  |
Unused commitment fee |  |  | 0.40% |  |
Term loan facility, effective percentage | 3.35% |  | 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% |  | 2.00% |  |
Interest rate swap, fixed rate | 2.85% |  | 2.85% |  |
LIBOR [Member] | Maximum [Member] |  |  |  |  |
Term Loan and Revolving Credit Facility (Textual) |  |  |  |  |
Margin rate for interest if using base rate | 2.50% |  | 2.50% |  |
Interest rate swap, fixed rate | 3.35% |  | 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 | $ 123,400,000 |  | $ 123,400,000 |  |

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- 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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