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Derivative Instruments - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Derivative Instruments [Line Items] |  |  |
Period of LIBOR interest rate | 30 days |  |
Fair value of interest rate corridor instrument | $ 1,917 |  |
Effective portion of gain/loss on derivatives included as a component of other comprehensive income, net of taxes |  |  | (92)
Maximum percentage of variable interest rates based on LIBOR | 1.50% |  |
Percentage of amount paid by University | 1.50% |  |
Minimum percentage of LIBOR | 1.50% |  |
Maximum percentage of LIBOR | 3.00% |  |
Percentage deducted from LIBOR for actual payment | 1.50% |  |
Interest expense on derivatives related to credit risk | 22 |  |
Interest Rate Corridor [Member] |  |  |
Derivative Instruments [Line Items] |  |  |
Notional amount of interest rate swap | 84,418 |  |
Interest Rate Swap [Member] |  |  |
Derivative Instruments [Line Items] |  |  |
Notional amount of interest rate swap | 8,915 |  |
Interest rate swap inception date | May 01, 2010 |  |
Interest rate swap maturity date | Apr. 30, 2014 |  |
Percentage of fixed interest on the amortizing notional amount of interest rate swap | 3.245% |  |
Interest rate swap reflected in a restricted cash account | 0 | 225 |
Interest Rate Swap [Member] | Accrued Liabilities [Member] |  |  |
Derivative Instruments [Line Items] |  |  |
Fair value of the interest rate swap liability | 111 |  |
Interest Rate Swap [Member] | Other Noncurrent Liabilities [Member] |  |  |
Derivative Instruments [Line Items] |  |  |
Fair value of the interest rate swap liability |  | 390 |
Cash Flow Hedging [Member] |  |  |
Derivative Instruments [Line Items] |  |  |
Effective portion of gain/loss on derivatives included as a component of other comprehensive income, net of taxes | $ 947 | $ 241 | $ 10

X
- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Details
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- Definition Interest expense on derivatives related to credit risk. + References No definition available. + Details
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- Definition Maximum percentage of variable interest rates based on base interest rate. + References No definition available. + Details
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- Definition Percentage deducted from base interest rate for actual payment. + References No definition available. + Details
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- Definition Percentage of amount paid by university. + References No definition available. + Details
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- Definition Percentage of fixed interest on the amortizing notional amount. + References No definition available. + Details
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- Definition Period of base interest rate. + References No definition available. + Details
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- Definition Reduced pledge collateral. + References No definition available. + Details
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- Definition Fair value of credit risk derivative asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13433-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4K -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5708775-113959 + Details
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- Definition Fair value of credit risk derivative liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13433-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4K -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5708775-113959 + Details
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X
- Definition High end of the range of variable interest rates when a range is presented for a group of interest rate derivatives. + References No definition available. + Details
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- Definition Date the entity entered into the derivative contract, in CCYY-MM-DD format. + References No definition available. + Details
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- Definition Low end of the range of variable interest rates when a range is presented for a group of interest rate derivatives. + References No definition available. + Details
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- Definition Date the derivative contract matures, in CCYY-MM-DD format. + References No definition available. + Details
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- Definition Amount after tax of reclassification adjustment from accumulated other comprehensive income of accumulated gain (loss) realized from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's deferred hedging gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=28358780&loc=d3e637-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=28358780&loc=d3e689-108580 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph c -URI http://asc.fasb.org/extlink&oid=7476318&loc=d3e41638-113959 + Details
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